This document provides examples of how to use present perfect simple and past simple tenses in English. It discusses using present perfect to talk about finished actions without a specific time reference. It provides examples of time expressions that can refer to periods continuing to the present. The document also gives examples of using "ever/never", "yet", "already" to talk about experiences and the timing of events. It includes exercises for learners to practice using these tenses in contexts like describing past experiences and asking about plans for the future.