1. have been (htht - for some months)
2. Has he ever drunk (htht - ever)
3. have met (htht- met)
4. left (qkđ- yesterday)
5. brings (htđ- every year)
6. were (htđ- last sunday)
7. have not painted (htht - yet)
8. are
9. have been (htht - for a long time)
10. has (htđ- always)
11. write (must+ V)
12. already have known (htht- already)
13. know (should +V)
14. was
15. help (ought to+ V)
16. has to
17. watches (htđ- often )
18. have visited
19. is cutting (httd- now)
20. was reading (qktd - at this time yesterday )
