Use:
We use the Present Perfect tense to talk about past events and activities that have results or consequences now:
The teacher has gone out . (he isn't here)
He hasn't cut his hair. (his hair is still long)
Form:
Affirmative.
I/We/You/They have/ 've cleaned the house.
He/She/It has/ 's seen a ghost.
Negative.
I/We/You/They have not/haven't cleaned the house.
He/She/It has not/hasn't played football.
Yes/No Q
uestions.Have I/you/we/they painted the walls?
Short Answers.
Yes, I/you/we/they have.
No, I/you/we/they haven't.
Yes/No Questions.
Has he/she/it talked to you?
Short Answers.
Yes, he/she/it has.
No, he/she/it hasn't.
Rule:
Aff- Subject + has/have + verb Past Participle + Predicate or complement.
Neg. Subject + hasn't/haven't + verb Past Participle + Predicate or complement.
Ques. Have/has + Subject + verb Past Participle + Predicate or complement + ?
Please, write down the summary on your Grammar notebook. Study the summary.