The document discusses the past continuous and future continuous tenses in English. The past continuous is used to describe an action that was ongoing or in progress at a specific time in the past. It is formed using was/were + verb+ing. The future continuous is used to describe an action that will be ongoing or in progress at a specific time in the future. It is formed using will/shall + be + verb+ing. Examples are provided to illustrate the use of these tenses in affirmative, negative and interrogative sentences.