The document provides information about using the past continuous tense in English grammar: 1) The past continuous tense is used to describe actions that were ongoing or in progress at a specific time in the past. 2) It is often used with time expressions like "while" or "when" to indicate that one action was happening simultaneously with another action in the past. 3) The past continuous and past simple tenses can be used together, with the past continuous showing an ongoing action that was interrupted by a one-time action in the past simple.