Răspuns:
1. I have been working
2. has not worked
3. have never slept
4. has been sleeping
5. have not been sleeping
6. have been waiting
7. have waited
8. have been cleaning
9. have you already cleaned
10. has never drunk
11. have been drinking
12. have finished
13. has been working
14. have you known
15. has been reading
16. have never eaten
17. have been dreaming
18. has become
19. have been
