The document discusses the simple past tense in English. It explains that the simple past tense is used to talk about actions that happened at a specific time in the past or habitual actions in the past. It provides examples of regular and irregular verbs in the positive, negative, and interrogative forms in simple past tense. It also discusses using time expressions like yesterday or last year with the simple past tense. The document concludes by providing example sentences using simple past tense verbs.