This document discusses the present perfect continuous tense. It is formed with "has/have been" plus the present participle. It is used to show an action that began in the past and continues in the present for a duration or recently/lately. Examples are given to illustrate using it for durations like "for five minutes" or "since Tuesday" as well as for recent, ongoing actions without a specific duration. The document concludes by noting that non-continuous verbs and some meanings of mixed verbs cannot be used in the continuous tenses and require the present perfect instead.