Here are examples of sentences in the present perfect tense:
1. Positive Sentences
I have visited Paris twice.
She has finished her homework.
They have just arrived at the station.
We have lived in this city for five years.
He has already eaten dinner.
2. Negative Sentences
I have not (haven’t) seen that movie yet.
She has not (hasn’t) completed the project.
They have not (haven’t) been to Japan.
We have not (haven’t) met the new teacher.
He has not (hasn’t) cleaned his room.
3. Questions
Have you ever traveled abroad?
Has she read this book before?
Have they completed their assignments?
Has he called you yet?
Have we reached the right address?
4. Uses
Experiences: I have never tried sushi.
Actions with a result in the present: He has lost his keys. (He can’t find them now.)
Unfinished time periods: We have worked hard this week.
Recently completed actions: She has just finished her exam.