This document provides information and examples about using the present perfect continuous tense in English. It explains that this tense is used to show an action that began in the past and has continued up until now. It gives "for five minutes," "for two weeks," and "since Tuesday" as examples of time durations that can be used with the present perfect continuous. The document also notes that the present perfect continuous can imply an action has been happening recently or repeatedly without a specific duration. It warns that some verbs like "have" are non-continuous so the simple present perfect must be used instead of the continuous form.