This document provides instruction on using the present perfect tense in English. It explains that the present perfect is used to describe actions or events that began in the past but have relevance to the present. It gives examples of the present perfect simple and continuous forms using common time expressions like "just", "already", "yet", and "ever". It also distinguishes when to use the present perfect versus the past simple tense, noting that the past simple is used for completed actions connected to specific past times while the present perfect is more ambiguous about time. Finally, it provides exercises for learners to practice using the present perfect tense in sentences and paragraphs.