The document discusses the present continuous, present perfect continuous, past continuous, and future continuous tenses in English. It provides examples of how each tense is used to describe actions that are happening now, recent activities with visible effects, actions in progress in the past, and pre-arranged future activities. The document also discusses how certain verbs like state verbs cannot be used in the continuous form and how some verbs can change meaning depending on whether they are used in a state or dynamic sense.