The document discusses the simple past tense in English. It explains that the simple past is used to describe actions that have happened in the past and ended. There are two types of past tense verbs: regular verbs that form the past by adding "-ed" and irregular verbs that have varying past forms. Examples of forming questions, affirmative answers, and negative responses in the simple past are provided. Exercises for conjugating verbs into the past tense and forming interrogative sentences are included at the end.