The document discusses different types of conditionals in English, including the zero conditional, which describes situations that are always true. It provides examples of zero conditionals like "if you heat water, it boils." The document also discusses the first conditional, which refers to possible situations in the present or future, and provides examples. Additionally, it covers the second conditional, which refers to unlikely or imaginary situations and uses "if" with the past tense. It provides examples of second conditionals and other conditional structures like "unless," "in case," "provided," and "as long as." Finally, the document discusses conditionals used to express wishes.
2. The zero conditional (always true) If X
happens, Y happens.
If you go , I come with
you.
When I was a child, if
you didnt have money
for something, you
couldnt buy it.
If you press the switch,
the light comes on.
3. OTHER EXAMPLES:
IF YOU HEAT WATER, IT BOILS.
IF YOU BOIL WATER, IT TURNS INTO
STREAM.
IF YOU COOL THE STEAM , IT TURNS
BACK TO THE PRIMARY MODE.
IF YOU HEAT A PIECE OF METAL, IT
EXPANDS.
IF YOU FREEZE A PIECE OF METAL, IT
CONTRACTS.
IF YOU FREEZE WATER, IT EXPANDS.
6. EXAMPLES:
IF EVERYONE RECYCLES PAPER,
COMPANIES WONT CUT DOWN SO
TREES.
IF EVERYONE RECYCLES METAL AND
GLASS, WE WONT WASTE VALUABLE
RESOURCES.
IF EVERYONE RECYCLES PAPER
,METAL AND GLASS , WE WONT
PRODUCE SO MUCH RUBBISH.
IF EVERYONE TURNS OFF UNWANTED
LIGHTS, WE WILL SAVE A LOT OF
ELECTRICITY.
IF EVERYONE WALKS OR CYCLES, WE
WONT WASTE SO MUCH OIL AND
PETROL.
IF COUNTRIES USE POWER STATIONS
LESS , IT WILL CAUSE LESS AIR
POLLUTION.
7. UNLESS , IN CASE, PROVIDED, AS LONG AS.
UNLESS AND IN CASE +
PRESENT SIMPLE
UNLESS MEANS :IF NOT. WE USE
IT WHEN WE SAY THAT IF
SOMETHING DOES NOT HAPPEN,
SOMETHING ELSE WILL HAPPENT.
EX. UNLESS WE DEAL WITH THE
GLOBAL WARMING PROBLEM,
AVERANGE TEMPERATURES WILL
RISE.
IN CASE DESCRIBES A POSSIBLE
SITUATION WE WANT TO BE
PERPARED FOR.
EX. TAKE AN UMBRELLA IN CASE IT
RAINS.
TAKE A PAIR OF RUNNING SHOES IN
CASE YOU NEED THEM.
PROVIDED, AS LONG AS +
PRESENT SIMPLE
PROVIDED AND AS LONG AS
MEAN ONLY IF.
EX. PROVIDED WE REDUCE
ENERGY CONSUMPTION,
WE CAN SLOW DOWN
GLOBAL WARMING. OR
EX. AS LONG AS WE REDUCE
ENERGY CONSUMPTION,
WE CAN SLOW DOWN
GLOBAL WARMING.
9. Examples:
What would happen if
the Earth stopped
turning?
If the Earth didnt have
a Moon, there wouldnt
be any tides.
If I were you, I wouldnt
do that.
10. Examples
If you were a horse, you
would see everything in black
and white.
If you looked inside your own
eye at the images there, they
would be upside down, and
they would be moving.
The worlds oceans contain
huge amounts of salt. In fact ,
if you removed all the salt
from the oceans , you would
be able to use it to build a
wall about 300 km wide and
a km tall all around the Earth.
11. If Id seen you, I would have
said hello.
If Alexander the Great had
marched west instead of east,
he would have conquered the
whole of Europe.
If more Vikings had gone to
North America, the Viking
settlements would have
succeed.
If Columbus had sailed east in
1492, he would have reached
China or Japan.
14. WISHES
About the present:
When we use wish to make a
wish about the present present,
we use the unreal past simple, as
in an unreal conditional sentence.
I wish I knew more about
European history.
Wishes about the past.
When we use wish to make a
wish about the past, we use the
past perfect, as in an impossible
past conditional sentence.
I wish I had been present at the
battle of Waterloo.
Wishes with would
We also use wish with would
when we want someone to do
something or not to do
something. This is often because
we think it is a bad habit.
I wish you wouldnt keep staring
at me!
I wish Pete would phone.
If only
We can use if only to make a
stronger kind of wish about the
present or the past.
If only I knew more about
European history!
If only I had studied harder!
15. If X had happened, Y would be different.
We often think about past events, and their effects on the
present.
If Chris hadnt gone to the hospital, he wouldnt be alive
today.
If I hadnt brought a map we would be lost!
If we hadnt gone to the
theatre last night he would be
alive today.
If I hadnt invated Russia,
perhaps I still would be Emperor.