This document provides information about the present perfect and past simple tenses in English. It discusses the differences between these tenses and provides examples of how to use each one properly based on clue words that indicate whether an action is completed or ongoing. Key points include:
- The present perfect tense uses "have/has + past participle" and indicates actions that began in the past and continue in the present or are relevant in the present. It is used with words like "since, for, yet, already."
- The past simple tense uses the simple past form of the verb and indicates actions that were completed at a specific time in the past. It is used with words like "yesterday, last year, in