The document discusses verb tenses in English grammar. It explains that tenses refer to the time of actions and events using the present, past and future. Each tense has four forms - simple/indefinite, continuous/progressive, perfect, and perfect continuous. The divisions of each tense are then defined, with examples provided of how to use the present, present continuous, present perfect, present perfect continuous, past indefinite, past continuous, past perfect, past perfect continuous, and future tenses. Sentence completion exercises are included to practice applying the tenses.