The document discusses various past tenses in English including the simple past, past continuous, past perfect, and past perfect continuous tenses. It provides examples of when each tense is used as well as how to form sentences in each tense. Key details include that the simple past tense is used to talk about completed actions in the past, the past continuous emphasizes ongoing or repeated actions, the past perfect expresses actions that happened before another past time or action, and the past perfect continuous emphasizes the duration of an activity before something else in the past.