1. doing, writing
2. written
3. studying
4. learnt
5. teaching
6. taught
7. done
8. found
9. looking
10. talking
11. talked
12. said
13. telling
14. told
15. told
16. had
17. having
18. spoken
19. asked
20. learnt
21. writing
22. doing, reding
23. read [red]
24. answering
25. fixed
26. heard
27. read [red]
28. done