The document discusses different past verb tenses in English, including the simple past, past continuous, past perfect, and past perfect continuous. It provides examples of how to form each tense and the contexts in which each tense is commonly used, such as to describe completed actions, ongoing actions, or actions that occurred before other past events. Key details include how regular and irregular verbs are conjugated in the past tense, the use of auxiliary verbs like "did" and "had", and common time expressions used with each past tense.