1. he has been studying English since three months
2. they have been written a test for two hours
3. we have been clean the classroom since 3 oclock
4. what were you read when i telephoned you?
5. will you help me, please?
6. i have already saw the film
7. he has never wash his clothes
8. did you ever dance in class?
9. your brouther was talk with his friends when i saw him yesterday
10. he has been doing exercises ten minutes