3/
1. has lived
2. had worked
3. Have you finished
4. have never been
5. had played/was
6. have finished
7. has worked/began
8. have already eaten
9. learned/has played
10. has grown
11. have thought
12. have believed
13. have you worked
14. came
15. has eaten
16. have been visiting
17. haven't worn
18. has been working/hasn't finished
19. bought
20. haven't written
