The document discusses the present continuous and past continuous tenses in English. The present continuous refers to ongoing or repeated actions happening now, while the past continuous refers to actions that were ongoing at a specific time in the past. Both tenses are formed using the auxiliary verb "to be" plus the present participle or "-ing" form of the main verb. The document provides examples of how to form, negate, and ask questions in both tenses, as well as common uses such as describing temporary or repeated situations.