Subject + Have/Has + ...+ V3
Affirmative
full form: I have worked./ He has worked.
short form: I've worked./He's worked.
ırregular: I have left./He has left.
Negative
full form: I have not worked./He has not worked.
short form: I haven't worked./He hasn't worked.
Interrogative
Have I worked?/ Has he worked?
Short answers
Yes, I have./No, I haven't.
= The present perfect tense is used to describe something that happened in the past, but the exact time it happened is not important. It has a relationship with the present.
**There must be connection with now.
We use the Present Perfect Tense (Usage):
1-) Actions which present started in the past and continued up to now;
I have worked here since 2016.
We have studied here for six months.
2-)To talk about experiences;
I have been to Istanbul.
I have never met a famous actor.
Have you ever seen a ghost? (Yes ı have, everyday. )
3-)Recent actions;
mom: What happened?
little Ben: Nothing mom! I have just broken the glass.
4-)Unstated time for actions happened in the past; (Time is not important!)
What a change! She has cut her hair.
What a suprise! They've had a baby.
*** We form the Present Perfect Simple with "have/has" and past participle.
To form the past participle of irregular verbs, we add "-ed".
However, some verbs have irregular past participles.
For Example: eat(base form) -ate(past simple) -eaten(past participle)
