The document describes the past continuous tense in English. It is used to describe actions that were ongoing or happening at a specific time in the past. It is formed using was/were + the present participle (-ing form) of the verb. The past continuous is used to talk about background actions that were interrupted by other events in the past or actions that occurred simultaneously. Examples are provided to illustrate the difference between the simple past and past continuous tenses. The document also provides instructions on forming questions and negatives in the past continuous as well as exercises for the reader to practice using the tense.