III.
1. for ages
2. since three years ago
3. since I had a holiday
4. since February
5. for two days
6. since ten o'clock
7. for a year
8. since I got up this morning
9. for ten hours
10. since Chrismast
11. for a long time
12. since March
13. since yesterday
14. since I was ten
15. for an hour
16. since two days ago
17. since May
18. since Monday
19. for a day
20. for 15 minutes

IV.
1. Have - done
3. has seen 
4. have waited
5. fixing
6. go
7. didn't go
8. taught
9. ironed
10. has done
11. to come
12. not to smoke
13. playing
14. to wear
15. to correct