In this text we will talk about the Present Perfect Tense, that is a very important tool for the English language:
The Present Perfect is used to indicate actions that started in the past and extend up to the present or when we.The Present Perfect is formed by the auxiliary verb “have” or “has” and the past participle of the main verb.
Affirmative Form:
She has lost.
Subject=SHE to have=HAS past participle=lost
Negative Form:
I haven’t walked.
Subject=I to have + n=haven’t past participle=walked
Interrogative Form:
Has he walked?
to have= Has Subject= past participle=walked?
more examples:
Affirmative Form Negative Form Interrogative Form
I have walked. I haven’t walked. Have I walked?
You have walked. You haven’t walked. Have you walked?
He has walked. He hasn’t walked. Has it walked?
We have walked. We haven’t walked. Have we walked?
They have walked. They haven’t walked. Have they walked?