This document provides information on the present perfect tense in English, including its uses, structure, contractions, verbs, pronunciation, and time expressions. The present perfect is used for actions that began in the past and have relevance to the present. It is formed using some form of the verb "have" plus the past participle of the main verb. There are regular and irregular past participles. Time expressions like "yet", "already", "ever", "never", "before", "since", and "for" are used with the present perfect to indicate the time frame of the action. Exercises are provided for practice with this tense.