This document summarizes the present perfect continuous tense in English. It provides the formula for forming sentences in the present perfect continuous, including the subject pronoun, auxiliary verb "to have", main verb in the -ing form, and other complements. Examples are given for affirmative, negative, and question sentences. It explains that the present perfect continuous is used to describe an activity that has recently stopped or just stopped and is connected to the present. It lists time expressions that are frequently used, such as "how long", "for", and "since".