Here are wider contexts for the sentences:
I write emails (Present Simple):
As part of my job, I write emails on a regular basis to communicate with colleagues and clients.
I’m writing an email (Present Continuous):
Right now, I am sitting at my computer and composing an email to send my boss the details of an upcoming project.
I’ve written an email (Present Perfect):
Earlier today, I wrote a lengthy email to the project team outlining my suggestions for the meeting agenda. I've already sent the email, so now I will wait for their responses.
Tc fls sihi_lem_lel_91_to_161_fla_en (pump chan khong)thanh Le
Ìý
The document describes SIHI liquid ring vacuum pumps models LEM and LEL. Key points:
- They are single-stage, displacement pumps with robust, uncomplicated construction.
- They can handle nearly all gases and vapors, as well as small amounts of entrained liquids. Operation is easy and reliable with low noise and vibration.
- Continuous water supply is needed during operation to remove heat from gas compression and replenish the liquid ring.
- Applications include exhausting dry and humid gases where a vacuum of 33 to 900 mbar is required.
- Specifications and performance characteristics and cutaway diagrams are provided for models LEM/LEL 91, 126, and 161.
La pericarditis es una inflamación del pericardio que generalmente se debe a una infección viral o bacteriana. Puede ser aguda o crónica. La pericarditis aguda se caracteriza por dolor precordial intenso que empeora con la inspiración, mientras que la crónica causa disnea, tos y fatiga debido al mal funcionamiento cardÃaco. Existen diferentes tipos como la fibrinosa, hemorrágica y constrictiva, dependiendo de si hay exudado o adherencias fibrosas en el pericardio.
El trauma torácico constituye una causa significativa de mortalidad.
Menos de 10% de las lesiones torácica cerradas y alrededor de 15-30% de las lesiones torácicas penetrantes requieren toracotomÃa
This document provides vocabulary related to sports in Spanish. It includes a list of sports vocabulary words with images. It then presents several activities to practice the sports vocabulary, including matching sports to images, a word search, matching winter sports to images, answering questions about sports, and selecting the correct sport or equipment for different questions. Links are provided at the end to additional online resources for learning more sports vocabulary.
This document lists various sports equipment and places. It includes helmets, pads, gloves, rackets, sticks, boots, boards, and courts, pitches, pools, rings, rinks, gyms, and tracks related to sports like boxing, tennis, hockey, football, surfing, skating, and athletics.
This document discusses English tenses and their uses. It covers the present simple, present continuous, past simple, past continuous, present perfect, present perfect continuous, future with "will", and future with "going to". For each tense, it provides the structure, examples, and explanations of when to use each tense. It also compares and contrasts the uses of similar tenses such as present simple vs present continuous, and future with "will" vs "going to".
The document summarizes key aspects of the present perfect simple and present perfect continuous tenses in English. It discusses their forms, definitions, differences between them, and provides examples of each. An exercise is included for learners to practice using these tenses correctly. The summary focuses on the key elements covered in the document at a high level.
This document discusses the present continuous tense in English. It explains that the present continuous is used to describe actions that are happening now, ongoing actions, scheduled future actions, and repeated actions. It provides examples of how to form the present continuous in affirmative, negative, and interrogative sentences. Finally, it includes exercises for learners to practice forming and using the present continuous tense.
This document provides information on verb tenses, specifically the simple present and present progressive tenses in English. It outlines the forms, usage, and meaning of these tenses. Key points include:
- The simple present is used for habitual or repeated actions, general truths, and scheduled future events. It is also used with stative verbs.
- The present progressive expresses ongoing or temporary actions happening at or around the time of speaking. It is used to describe changing situations or arrangements.
- Examples are given to illustrate the differences between the simple present and present progressive and their typical uses. Spelling rules for forming the '-ing' verb form in the present progressive are also covered. Exercises are provided for practice.
This document provides information about the present continuous tense in English. It defines the present continuous tense as describing actions that are happening at the time of speaking or around the current time. It gives examples of affirmative, negative, and interrogative forms of the present continuous tense and rules for forming the -ing verb form (gerund). It also lists some verbs like seem, want, know that are typically not used in the continuous tenses since they describe states rather than actions.
This document provides information about the present continuous tense in English. It defines the present continuous tense as describing actions that are happening at the time of speaking or around the current time. It gives examples of affirmative, negative, and interrogative forms of the present continuous tense and rules for forming the -ing verb form (gerund). It also lists some verbs like seem, want, know that are typically not used in the continuous tenses and instead take the simple present or past tense.
This document discusses various English verb tenses and structures including:
- Simple present tense is used for routines, habits, facts.
- Present continuous is used for temporary situations and future arrangements.
- Present perfect simple is used for actions that started in the past and continue to the present.
- Simple past is used for completed past actions and past situations.
- Used to is used for past habits or actions that no longer occur.
- Will, be going to, modal verbs and other structures are used to discuss future events or situations. Conditionals and other structures express conditional meanings.
This document provides an outline for an English grammar course, covering topics such as verbs, adjectives, adverbs, tenses, and exercises. The course consists of 16 sessions, beginning with greetings, verbs and tenses. Later sessions cover pronouns, passive voice, conjunctions, and comparative adjectives, culminating in a final exam. Interspersed are quizzes, a midterm, and reviews of previously taught material.
The document discusses various English verb tenses:
- Simple Present, Present Continuous, Present Perfect, and Present Perfect Continuous tenses are explained in terms of their structures and common uses.
- Simple Past, Past Continuous, Past Perfect, and Past Perfect Continuous tenses are also defined in terms of formation and application.
- Future tenses like Simple Future, Future Continuous, and Future Perfect are outlined along with examples of appropriate usage.
The document discusses various English verb tenses:
- Simple Present tense is used for habitual or repeated actions and general truths. It uses the base form of the verb.
- Present Continuous tense expresses an action happening now or at around the time of speaking. It uses the verb "be" plus the present participle form of the main verb.
- Present Perfect tense connects a past action to the present. It uses the auxiliary verb "have/has" plus the past participle form of the main verb. It can express experience, change, or a continuing situation from the past until now.
The document provides information on present continuous tense and present simple tense. It discusses how present continuous is used to describe temporary actions happening around now while present simple describes general or repeated actions. It also lists verbs that can and cannot be used in continuous form, including state verbs versus action verbs. Examples are given to illustrate the different uses of present continuous and present simple.
The document discusses the present tense in English. It describes two main uses of the present simple tense: (1) for repeated or habitual actions, and (2) for facts or generalizations. It provides examples like "I play tennis" and "Cats like milk." The document also discusses the present continuous tense and its uses to talk about actions happening now or these days. It provides examples of forming the present continuous with subjects and verbs, and covers spelling rules for verbs ending in consonant+y and verbs with one syllable ending in a consonant before adding -ing.
The document discusses the differences between the present perfect and past simple tenses. The past simple is used to refer to completed actions or situations that were true over a definite period in the past. The present perfect is used to refer to situations that began in the past but continue in the present, or when the exact time of an event is unknown. Examples are provided to illustrate using each tense with time phrases like "yesterday" or "up to now." Common verbs are classified by their pronunciation when using the past tense "-ed" ending.
This document provides information about the present continuous and simple present verb tenses in English. It explains that the present continuous tense is used to describe actions happening now, while the simple present tense describes habitual or routine actions. Key points include examples and forms of each tense, spelling rules for -ing verbs, uses of static vs. continuous verbs, and questions/negatives in both tenses. Common verbs are given as examples to demonstrate when to use the present continuous or simple present form.
1. The present perfect tense is used to talk about experiences that have occurred at unspecified times in the past. It is used to discuss actions that began in the past and continue in the present, or that have results in the present.
2. The present perfect tense is formed using the auxiliary verb "have" and the past participle of the main verb. It is used with time expressions like "never," "ever," "since," and "for."
3. Questions in the present perfect can be formed to ask about experiences, durations of time, numbers of occurrences, or locations.
The document summarizes various verb tenses in English:
- It discusses the present, past, and future simple tenses as well as continuous, perfect, and perfect continuous tenses.
- For each tense, it provides examples of formation, use, and placement on a timeline diagram. Key uses include habitual actions, plans/schedules, recent experiences, and the sequence of past events.
- The tenses are used to express the timing or continuity of actions across time frames from the past to the present to the future.
This document provides a summary of English grammar structures including:
1) The use of "have to/had to" in questions and short answers in various tenses.
2) The difference between using the present continuous and present simple tenses.
3) How to form the present continuous, present simple, questions, and short answers, including spelling rules.
4) Common structures for apologies, reasons, and promises.
The document discusses the present perfect tense in English. It is used to talk about experiences without mentioning when they occurred, actions that began in the past and continue in the present, and past actions that have present results. Examples are provided for forming positive and negative sentences in the present perfect tense, asking yes/no and information questions, and using words like already, yet, for, and since with the tense.
The document discusses the simple past tense in English, including how regular and irregular verbs are formed in the past tense, when the simple past tense is used, common time expressions used with it, and how to pronounce the "-ed" ending on regular past tense verbs which can sound like "t", "d", or "id". It provides examples of regular and irregular verb forms and encourages students to practice identifying regular and irregular past tense verbs and their pronunciation.
The document is a worksheet with exercises for students to practice verb conjugations and tenses in English. Section I has students fill in blanks with "am", "are", "have", or "can" to form questions and answers. Section II has students read statements and write the opposite. Section III has students unscramble sentences and write the response. The worksheet provides practice with basic English grammar through identification and formation of simple sentences.
This document discusses English tenses and their uses. It covers the present simple, present continuous, past simple, past continuous, present perfect, present perfect continuous, future with "will", and future with "going to". For each tense, it provides the structure, examples, and explanations of when to use each tense. It also compares and contrasts the uses of similar tenses such as present simple vs present continuous, and future with "will" vs "going to".
The document summarizes key aspects of the present perfect simple and present perfect continuous tenses in English. It discusses their forms, definitions, differences between them, and provides examples of each. An exercise is included for learners to practice using these tenses correctly. The summary focuses on the key elements covered in the document at a high level.
This document discusses the present continuous tense in English. It explains that the present continuous is used to describe actions that are happening now, ongoing actions, scheduled future actions, and repeated actions. It provides examples of how to form the present continuous in affirmative, negative, and interrogative sentences. Finally, it includes exercises for learners to practice forming and using the present continuous tense.
This document provides information on verb tenses, specifically the simple present and present progressive tenses in English. It outlines the forms, usage, and meaning of these tenses. Key points include:
- The simple present is used for habitual or repeated actions, general truths, and scheduled future events. It is also used with stative verbs.
- The present progressive expresses ongoing or temporary actions happening at or around the time of speaking. It is used to describe changing situations or arrangements.
- Examples are given to illustrate the differences between the simple present and present progressive and their typical uses. Spelling rules for forming the '-ing' verb form in the present progressive are also covered. Exercises are provided for practice.
This document provides information about the present continuous tense in English. It defines the present continuous tense as describing actions that are happening at the time of speaking or around the current time. It gives examples of affirmative, negative, and interrogative forms of the present continuous tense and rules for forming the -ing verb form (gerund). It also lists some verbs like seem, want, know that are typically not used in the continuous tenses since they describe states rather than actions.
This document provides information about the present continuous tense in English. It defines the present continuous tense as describing actions that are happening at the time of speaking or around the current time. It gives examples of affirmative, negative, and interrogative forms of the present continuous tense and rules for forming the -ing verb form (gerund). It also lists some verbs like seem, want, know that are typically not used in the continuous tenses and instead take the simple present or past tense.
This document discusses various English verb tenses and structures including:
- Simple present tense is used for routines, habits, facts.
- Present continuous is used for temporary situations and future arrangements.
- Present perfect simple is used for actions that started in the past and continue to the present.
- Simple past is used for completed past actions and past situations.
- Used to is used for past habits or actions that no longer occur.
- Will, be going to, modal verbs and other structures are used to discuss future events or situations. Conditionals and other structures express conditional meanings.
This document provides an outline for an English grammar course, covering topics such as verbs, adjectives, adverbs, tenses, and exercises. The course consists of 16 sessions, beginning with greetings, verbs and tenses. Later sessions cover pronouns, passive voice, conjunctions, and comparative adjectives, culminating in a final exam. Interspersed are quizzes, a midterm, and reviews of previously taught material.
The document discusses various English verb tenses:
- Simple Present, Present Continuous, Present Perfect, and Present Perfect Continuous tenses are explained in terms of their structures and common uses.
- Simple Past, Past Continuous, Past Perfect, and Past Perfect Continuous tenses are also defined in terms of formation and application.
- Future tenses like Simple Future, Future Continuous, and Future Perfect are outlined along with examples of appropriate usage.
The document discusses various English verb tenses:
- Simple Present tense is used for habitual or repeated actions and general truths. It uses the base form of the verb.
- Present Continuous tense expresses an action happening now or at around the time of speaking. It uses the verb "be" plus the present participle form of the main verb.
- Present Perfect tense connects a past action to the present. It uses the auxiliary verb "have/has" plus the past participle form of the main verb. It can express experience, change, or a continuing situation from the past until now.
The document provides information on present continuous tense and present simple tense. It discusses how present continuous is used to describe temporary actions happening around now while present simple describes general or repeated actions. It also lists verbs that can and cannot be used in continuous form, including state verbs versus action verbs. Examples are given to illustrate the different uses of present continuous and present simple.
The document discusses the present tense in English. It describes two main uses of the present simple tense: (1) for repeated or habitual actions, and (2) for facts or generalizations. It provides examples like "I play tennis" and "Cats like milk." The document also discusses the present continuous tense and its uses to talk about actions happening now or these days. It provides examples of forming the present continuous with subjects and verbs, and covers spelling rules for verbs ending in consonant+y and verbs with one syllable ending in a consonant before adding -ing.
The document discusses the differences between the present perfect and past simple tenses. The past simple is used to refer to completed actions or situations that were true over a definite period in the past. The present perfect is used to refer to situations that began in the past but continue in the present, or when the exact time of an event is unknown. Examples are provided to illustrate using each tense with time phrases like "yesterday" or "up to now." Common verbs are classified by their pronunciation when using the past tense "-ed" ending.
This document provides information about the present continuous and simple present verb tenses in English. It explains that the present continuous tense is used to describe actions happening now, while the simple present tense describes habitual or routine actions. Key points include examples and forms of each tense, spelling rules for -ing verbs, uses of static vs. continuous verbs, and questions/negatives in both tenses. Common verbs are given as examples to demonstrate when to use the present continuous or simple present form.
1. The present perfect tense is used to talk about experiences that have occurred at unspecified times in the past. It is used to discuss actions that began in the past and continue in the present, or that have results in the present.
2. The present perfect tense is formed using the auxiliary verb "have" and the past participle of the main verb. It is used with time expressions like "never," "ever," "since," and "for."
3. Questions in the present perfect can be formed to ask about experiences, durations of time, numbers of occurrences, or locations.
The document summarizes various verb tenses in English:
- It discusses the present, past, and future simple tenses as well as continuous, perfect, and perfect continuous tenses.
- For each tense, it provides examples of formation, use, and placement on a timeline diagram. Key uses include habitual actions, plans/schedules, recent experiences, and the sequence of past events.
- The tenses are used to express the timing or continuity of actions across time frames from the past to the present to the future.
This document provides a summary of English grammar structures including:
1) The use of "have to/had to" in questions and short answers in various tenses.
2) The difference between using the present continuous and present simple tenses.
3) How to form the present continuous, present simple, questions, and short answers, including spelling rules.
4) Common structures for apologies, reasons, and promises.
The document discusses the present perfect tense in English. It is used to talk about experiences without mentioning when they occurred, actions that began in the past and continue in the present, and past actions that have present results. Examples are provided for forming positive and negative sentences in the present perfect tense, asking yes/no and information questions, and using words like already, yet, for, and since with the tense.
The document discusses the simple past tense in English, including how regular and irregular verbs are formed in the past tense, when the simple past tense is used, common time expressions used with it, and how to pronounce the "-ed" ending on regular past tense verbs which can sound like "t", "d", or "id". It provides examples of regular and irregular verb forms and encourages students to practice identifying regular and irregular past tense verbs and their pronunciation.
The document is a worksheet with exercises for students to practice verb conjugations and tenses in English. Section I has students fill in blanks with "am", "are", "have", or "can" to form questions and answers. Section II has students read statements and write the opposite. Section III has students unscramble sentences and write the response. The worksheet provides practice with basic English grammar through identification and formation of simple sentences.
The document discusses the differences between infinitives and gerunds. It provides examples of verbs that can take infinitive or gerund complements, as well as verbs that can take both. The examples show how the different structures indicate different sequences of actions. The document asks questions about forgetting to take medicine versus forgetting taking medicine.
This document introduces some basic greetings and conversational phrases in 3 sections:
1) Greetings for different times of day such as "Good morning!", "Good afternoon!", and "Good evening!". It also includes shorter responses like "Morning!", "Afternoon!", and "Evening!".
2) Farewell phrases including "Goodnight!", "Good-bye!", and "Bye-bye!". It also includes the response "Night!".
3) The final section encourages listening to a sample conversation and practicing the greetings and farewells presented.
The document discusses the present perfect tense and how it connects past actions or situations with the present. It is used to indicate that something started in the past and may still be ongoing now or has relevance to the present. Examples are provided to illustrate using the present perfect with phrases like "for 5 years" to discuss how long something has been happening up until now, and with time words like "recently" or "since" to specify a time period.
This document describes a town that received huge aid from an agency, allowing it to build massive new facilities like a leisure centre and great shops, though it remains a small village with only a small bus system.
The document lists various places in town and provides a brief 1-sentence description of each, including that a post office delivers mail, a kindergarten is where children play and learn, a playground is for fun and games, a school is where children learn, a police station safeguards public order, a hospital treats people, a shop sells necessities, a library houses books to read and borrow, a church is a community of believers, a skyscraper is a tall building, a block of flats houses many people, and a family house is for a single family to live in.
This document provides information about using the future intention construction "going to" in English. It discusses the form, which is "am/is/are + going to + infinitive", examples of positive and negative sentences, and questions. It also discusses the use, which is to express a future decision, intention or plan made before the moment of speaking. There are then two short examples that model conversations using "going to" to discuss plans for a party.
This document provides examples of prepositions used with gerunds, adjectives, and verbs. It then introduces Ted and Nicole, describing their personalities and attitudes. Ted is an extrovert who is honest, doesn't complain about working long hours, and is afraid of flying. Nicole is an introvert who is bored and tired of being a student but is excited to go on vacation, unlike Ted she is not afraid of flying.
This document describes an individual who possesses both positive and negative personality traits. They are sociable, pretty and smart, but also determined, creative and shy. The document provides a brief high-level view of this person's personality by listing these six traits in two lines with three adjectives each.
This document discusses the present continuous tense in English. It is used to describe actions that are happening now or ongoing actions happening these days. Examples are provided like "I am working" and "She is studying at MiraCosta College." Learners are asked to practice with a partner by describing what people are doing using sentences with the structure of "subject + to be + verb + ing." The spelling rules for -ing verbs and exceptions to non-continuous verbs like "have" are also briefly covered.
This document provides instructions for forming verbs in the simple past tense in English, including using -ed or -d for regular verbs, dropping the -y and adding -ied for verbs ending in consonant -y, and memorizing irregular verb forms. It also explains how to form questions in the simple past by changing "do" to "did" and how to form the passive voice using the past tense of "to be" plus the past participle.
This document provides information about using the simple present tense in English. It discusses the uses of the simple present tense, including for everyday activities, routines, and general truths. Rules for forming the simple present tense in both affirmative and negative forms are presented, including spelling rules for third person singular verbs and how to form questions.
2.  1. I’m learning Chinese.
 2. You’ve walked across the Amazon jungle.
 3. It has meant that I can finance my next
expedition.
 4. My mum and dad always watch my
documentaries.
 5. My agent is waiting for me.
 6. I’ve always loved travelling.
 7. I don’t like going with groups.
3. Answers
 1. I’m learning Chinese. – Present Continuous
 2. You’ve walked across the Amazon jungle. –
Present Perfect
 3. It has meant that I can finance my next
expedition. – Present Perfect
 4. My mum and dad always watch my
documentaries. – Present Simple
 5. My agent is waiting for me. – Present
Continuous
 6. I’ve always loved travelling. – Present Perfect
 7. I don’t like going with groups. - Present Simple
4. Present Simple
 I live in Belgrade.  We live in Belgrade.
 You live in Belgrade.  You live in Belgrade.
 He/She/It lives in  They live in
Belgrade. Belgrade.
5. Present Simple - questions
 Do I live in  Do we live in
Belgrade? Belgrade?
 Do you live in  Do you live in
Belgrade? Belgrade?
 Does he/she/it live  Do they live in
in Belgrade? Belgrade?
6. Present Simple - negative
 I don’t live in  We don’t live in
Belgrade. Belgrade.
 You don’t live in  You don’t live in
Belgrade. Belgrade.
 He/she /it doesn’t  They don’t live in
live in Belgrade. Belgrade.
7. We use the Present Simple to talk
about:
 Activities that we repeat regularly (routines, habits).
My mum and dad always watch my documentaries.
 Permanent situations and states.
I don’t like cheese.
 General truths
A doctor works in a hospital.
Common time adverbials:
always, often, usually, sometimes, never
every day, every week, every year ...
twice a week, once a month
regularly, seldom, hardly ever, occasionally
8. Spelling
 Y is lost in verbs  We use –es with
ending in consonant verbs ending in -s,
+y: -z, -sh, -ch, -s, -x:
fly – flies watches, teaches,
study – studies washes, fixes...
 -es where you
wouldn’t normally
expect it
does
goes
9. Present Continuous
 I am watching TV.  We are watching TV.
 You are watching TV.  You are watching
 He/she/it is watching TV.
TV.  They are watching
TV.
10. Present Continuous - questions
 Am I watching TV?  Are we watching
 Are you watching TV?
TV?  Are you watching
 Is he/she/it watching TV?
TV?  Are they watching
TV?
11. Present Continuous - negative
 I am not watching  We are not watching
TV. TV.
 You are not  You are not
watching TV. watching TV.
 He/she/it is not  They are not
watching TV. watching TV.
12. We use the Present Continuous to talk
about:
 Activities that are going on at the time of
speaking.
Right now, I am giving a lecture and you are
listening.
 Activities that happen regularly but only for a
limited period of time (temporary routines and
habits).
I’m studying English a lot these days because we
are having a test next week.
Common time adverbials:
13. Spelling
 Verbs ending in –e lose  Short verbs ending in
the final -e when –ing is one vowel + one
added. consonant double the
phone – phoning last consonant.
make – making sit – sitting
change – changing cut – cutting
swim – swimming
 Verbs ending in –ie:
lie – lying
tie – tying
14. Present Perfect: have/has +3rd
column
 I have done the  We have done the
homework. homework.
 You have done the  You have done the
homework. homework.
 He/she/it has done  They have done the
the homework. homework.
15. Present Perfect - Questions
 Have I done the  Have we done the
homework? homework?
 Have you done the  Have you done the
homework? homework?
 Has he/she/it done  Have they done the
the homework? homework?
16. Present Perfect - negative
 I have not done the  We have not done
homework. the homework.
 You have not done  You have not done
the homework. the homework.
 He/she/it has not  They have not done
done the homework. the homework.
17. We use the Present Perfect to talk
about:
 Past events and activities with results or
consequences in the present.
I’ve lost my keys and now I can’t open the door.
 An action in the past when we don’t know or are not
interested in when it happened. (to talk about
experience)
I’ve been to China.
 Things that started in the past and continue up till
now.
I’ve always wanted to travel.
Common time adverbials:
never, ever, since, for, already, yet, all my life, always
18. The use and meanings of time
adverbials
 already and yet  since and for
We use already in Since tells us about a
statements and yet in point in time when the
questions and activity began.
negative sentences. We’ve been friends
I’ve already seen that since 2003.
film. For tells us about the
I haven’t finished yet. period of time that the
activity has taken.
We’ve been friends for
five years.
19. Do the matching task
 Write the use(s) for each example presented
in diapo nº 2. Only Present Simple and
Present Continuous.
20. Revision
Give a wider context for each of the sentences
below.
 I write emails.
 I’m writing an email.
 I’ve written an email.