English

The Present Perfect Tense

The present perfect is formed from the present tense of the verb have  and the past participle of a verb.

We use the present perfect for something that started in the past and continues in the present.

Affirmative	Negative	Interrogative
I have walked	I haven’t walked	Have I walked?
You have walked	You haven’t walked.	Have you walked?
He, she, it has walked	He, she, hasn’t walked	Has he, she, it walked?
We have walked	We haven’t walked	Have we walked?
You have walked	You haven’t walked	Have you walked?
They have walked	They haven’t walked	Have they walked?

Key words forthe present perfect are: for; since; yet; ever; always; so far; times; many times; lately; recently; already.

Sam has visited Hawaii many times. Paul has been here for six hours. Yoko has known Mary since 1994. I have already written a letter to the president.