The document discusses the present perfect and present perfect continuous tenses in English. It provides examples of when to use each tense, including when an action started in the past and continues in the present (present perfect continuous), or when an action in the past has relevance to the present (present perfect). It also discusses time words like "just", "ever", "yet", and "since" that are used with these tenses. Exercises are included to practice forming sentences in the present perfect and present perfect continuous tenses.