1. has been cleaning
2. haven’t watched
3. were walking
4. is washing
5. haven’t seen
6. left
7. boils
8. have been working
9. are repairing
10. will
11. was sleeping
12. was sailing
13. has been teaching
14.
15. examined
16. are discussing
17.
18.
19. Haven’t danced
20. Has been playing
