English tenses can be categorized into simple, progressive, perfect, and perfect progressive forms. They indicate the time of an action (past, present, future) and whether it is ongoing, completed, or experienced up to a point in time. The document provides examples of how to form each tense in both affirmative and negative constructions using auxiliary verbs like be, have, and modal verbs. It also explains the typical uses of each tense in terms of time frames and the relationship between actions.