Present perfect vs past simple
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The document compares and contrasts the present perfect and past simple tenses. It states that the present perfect is used to talk about actions that happened at an unspecified time before now, without a specific time mentioned. In contrast, the past simple expresses actions that started and finished at a definite point in the past. Examples of the forms and uses of each tense are provided.
![Comparation PresentPerfect Past Simple We use the Present Perfect to say that an action happened at an unspecified time before now. The exact time is not important. You CANNOT use the Present Perfect with specific time expressions such as: yesterday, one year ago, last week. We CAN use the Present Perfect with unspecific expressions such as: never, once, before, already, yet, etc. Use the Simple Past to express the idea that an action started and finished at a specific time in the past. Sometimes, the speaker may not actually mention the specific time, but they do have one specific time in mind. FORM EXAMPLES FORM EXAMPLES [Pronoun + has/have + past participle + complement] ,[object Object]](https://image.slidesharecdn.com/presentperfectvspastsimple-100508150013-phpapp02/85/Present-perfect-vs-past-simple-1-320.jpg)
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