The present perfect simple expresses an action that is still going on or that stopped recently, but has an influence on the present. It puts emphasis on the result.

Form of Present Perfect:

[has/have + past participle]


I have seen that movie twenty times.

I think I have met him once before.

There have been many earthquakes in California.

People have traveled to the Moon.

People have not traveled to Mars.

Have you read the book yet?

Nobody has ever climbed that mountain.

A: Has there ever been a war in the United States?B: Yes, there has been a war in the United States.

For irregular verbs, use the participle form (see list of irregular verbs, 3rd column). For regular verbs, just add “ed”.

Use of Present Perfect :

1.Puts emphasis on the result
Example: She has written five letters.

2. Action that is still going on

Example: School has not started yet.

3. Action that stopped recently

Example: She has cooked dinner.

4. Finished action that has an influence on the present

Example: I have lost my key.

5. Action that has taken place once, never or several times before the moment of speaking
Example: I have never been to Australia

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