1. did you do (yesterday -> QKĐ)
2. have you learned (how long -> HTHT)
3. has never been (never -> HTHT)
4. had (last week -> QKĐ)
5. have read (several times before -> HTHT)
6. was - heard - cried (Đã xảy ra, đã kết thúc + liên tiếp nhau -> cùng chia QKĐ)
7. have studied (so far -> HTHT)
8. haven't seen (since last week -> HTHT)
9. travelled (last summer -> QKĐ)
10. gave (ago->QKĐ)
11. have been waiting/have waited - hasn't come (nhấn mạnh quá trình -> HTHTTD/for 2h -> HTHT (2 cách); yet -> HTHT)
12. has written (since -> HTHT)
13. have you learnt (how long -> HTHT)
14. has already finished (already -> HTHT)
15. have read (several times before -> HTHT)
16. has never been (never -> HTHT)
17. has studied (for -> HTHT)