present perfect

Present Perfect - Use

1) Result of an action in the past is important in the present

I have cleaned my room.

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2) Recently completed action

He has just played handball.

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3) State beginning in the past and still continuing

We have lived in Canada since 1986.

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Signal words

just, yet, never, already, ever, so far, up to now, recently, since, for

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Form

have/has + past participle

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Examples

Affirmative sentences:

I have cleaned my room. I've cleaned my room.

You have cleaned your room. You've cleaned your room.

Negative sentences:

I have not cleaned my room. I've not cleaned my room. I haven't cleaned my room.

You have not cleaned your room. You've not cleaned your room. You haven't cleaned your room.

Questions:

In the Present Perfect we put the auxiliary (have or has) before the subject
(Auxiliary - Subject - Verb - Rest). see: Questions in the Present Perfect

Have I cleaned my room?

Have you cleaned your room?