Change to negative:
I have read the book.
I haven’t read the book.
Change to affirmative:
Have they gone to the park?
They have gone to the park.
Make a question:
We have gone to the zoo.
Have we gone to the zoo?
Change to negative:
We have met the new teacher.
We haven’t met the new teacher.
Change to a question:
She hasn’t eaten lunch.
Has she eaten lunch?
Change to negative:
They have been to Japan.
They haven’t been to Japan.
Change to affirmative:
I haven’t sat down yet.
Have I sat down yet?
Change to a question:
You have had dinner already.
Have you had dinner already?
Change to both negative and question:
He has said hello.
negative: He hasn’t said hello.
question: Has he said hello?
Change to both affirmative and negative:
Has she been to London?
affirmative: She has been to London.
negative: She hasn’t been to London.