The document discusses the simple past tense in English. It explains that the simple past is used to talk about activities or situations that began and ended in the past, and provides examples using time expressions like "yesterday" and "last night." It then gives the forms of the simple past for statements, negatives, and questions. Finally, it provides examples of regular verbs like "asked" and "baked" changing from the simple present to the simple past tense, as well as tables listing common irregular verbs and their past and past participle forms.