present perfect simple

present perfect simple present perfect simple plan: 1.affirmative version 2. explanation of grammar 3types of grammar apperance form affirmative interrogative i you have worked we have written they he she has worked it has written have i/you/we/they worked? have i/you/we/they written? has he/she/it worked? has he/she/it written? i/you/we/they haven’t worked i/you/we/they haven’t written he/she/it hasn’t worked he/she/it hasn’t written negative uses 1. for an action that happened in the past but whose results are obvious in the present. john’s car is dirty. he washes the car. he has washed the car. 2. for an action that has just finished. time expression: just marc is having lunch. he has just had lunch. 3. for an action that started in the past …

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