The document compares and contrasts the present perfect simple tense and past simple tense. 1. The present perfect simple tense expresses an action that is still ongoing or recently stopped, putting emphasis on the result. It uses the form of "have/has + past participle." 2. The past simple tense is used to talk about actions that happened at a specific time in the past, whether short or long. It uses the form of "verb + ed" or irregular verbs. 3. An exercise is provided requiring the use of correct forms for present perfect simple and past simple tenses.