The document discusses the present perfect continuous tense in English. It explains the affirmative, negative, and interrogative forms using the auxiliary verbs "have" and "been" plus the present participle. It then provides examples of how to use the tense to talk about actions that began in the past and are ongoing, actions that have been happening recently or lately, and how the present perfect continuous is often used with time expressions like "for" and "since". Finally, it compares using the present perfect continuous versus the present perfect simple tense.