This document provides information and examples about using the present perfect tense in English. It discusses how the present perfect is used to talk about actions that began in the past but continue in the present, actions that happened at an unspecified time in the past, and recently completed actions. It also covers the use of words like "already", "yet", "ever", "never", "since", and "for" with the present perfect. Examples are provided to illustrate the different uses.