` 30 `  : weren't learning

` - `  Ta chia thì QKTD :

` ( - ) ` : S +wasn't /weren't + V-ing

`DHNB `  : at this time last Thursday

` 31 `  : haven't seen

` - `  Ta chia thì HTHT + since :

` -> `  : S + have / has + VPII + since + 1 mốc TG / QKĐ

` DHNB ` : since last monday

` 32 `  : hasn't come

` - `  HTHt + yet : S + haven't / hasn't + VPII + yet

` 33 ` : didn't go

` - ` Ta chia thì QKĐ :

`( - ) ` : S + didn't + V nguyên mẫu

` DHNB ` : Yesterday

` 34 ` : haven't lived

` - `  Ta chia thì HTHT + since :

` -> `  : S + have / has + VPII + since + 1 mốc TG / QKĐ

` DHNB ` : since 2010

` 35 ` : wasn't sleeping 

` - `  Ta chia thì QKTD :

` ( - ) ` : S +wasn't /weren't + V-ing

`DHNB `  : at 3 o'clock yesterday

` 36 `  : hasn''t appeared

` - ` Ta chia thì HTHT + for 

` -> `  S + have / has + VPII + for + 1 khoảng TG

` DHNB ` ; for a long time

30. weren't learning

at this time last thursday => thì quá khứ tiếp diễn

31. haven't seen

since => thì hiện tại hoàn thành

32. hasn't come

yet => thì hiện tại hoàn thành

33. didn't go

yesterday => thì quá khứ đơn

34. haven't lived

since + mốc thời gian=> thì hiện tại hoàn thành

35. wasn't sleeping

at three o'clock yesterday =>thì quá khứ tiếp diễn

36. hasn't appeared

for + khoảng thời gian=> thì hiện tại hoàn thành