yang Exercise nya tolong diubah ke present perfect tense..!!! Butuh sekarang pliis

1. i've been waiting for the bus for half an hour.
2. excuse me, sir. have you been to Indonesia begore?
3. he has gone.
4. have you made up your mind yet?
5. i haven't returned the car yet.
6. have you had dinnet yet?
7. has anik made a report?
8. they have been looking for you for an hour.
9. how long have you been sitting in the waiting room?
10. how long have you been studying English?