This document provides examples and explanations for using the present perfect tense in English. It discusses how the present perfect is used to describe actions that began in the past and continue in the present, actions that occurred at an unspecified time in the past, and recent past actions. It also explains how words like "since," "for," "just," "already," and "yet" are often used with the present perfect. Finally, it gives practice examples of forming affirmative, negative, and interrogative sentences in the present perfect simple tense.