The document discusses the present perfect tense in English. It is used to narrate events that occurred in the past but still have relevance in the present. The present perfect is formed using the present tense of the auxiliary verb "have" plus the past participle of the main verb. It connects the past with the present and future and is often used with time adverbs like "for" and "since". Examples of affirmative, negative, and interrogative sentences in the present perfect tense are provided.