The document discusses the past simple and past continuous tenses in English. The past simple uses a single verb to talk about completed actions in the past, while the past continuous uses "was/were + verb+ing" to describe actions that were ongoing or in progress at a specific time in the past. The document provides examples of how to use each tense and when each is appropriate, such as using past continuous to emphasize that an action was in progress or happening simultaneously with another action.