41 has already been

- already -> HTHT : S + have/has + PII

42 haven't met - said

- HTHT + since + QKĐ : kể từ khi

43 saw - was reading

- Hành động đang diễn ra chia QKTD, hành động xen vào chia QKĐ

44 was practicing - rang

- Tương tự 43

45 died - have never seen

- since then + HTHT

- ago -> QKĐ

46 used

- Would you mind if + S + V quá khứ đơn : bạn có phiền nếu...?

47 were you doing - met - was waiting

- Tương tự 43, 44

48 didn't smoke

- would rather S + V quá khứ đơn : muốn ai đó làm gì

49 didn't go - was

- yesterday -> QKĐ

50 did you buy - bought

- yesterday morning -> QKĐ

Công thức thì HTHT

(+) S + has/have + V3/ed 

(-) S + has/have + not + V3/ed 

(?) Has/Have + S+ V3/ed?

DHNB: before, since + mốc thời gian, for + khoảng thời gian, yet, already, just,....

Công thức thì QKTD 

(+) S + was/were + Ving 

(-) S + was/were+ not + Ving 

(?) Was/Were +S +Ving? 

Công thức thì QKĐ (V: to be)

(+) S + was/were + ... 

(-) S + was/were + not ... 

(?) Was/Were + S ... ? 

S số ít, I, he, she, it + was

S số nhiều, you, we ,they + were

Công thức thì QKĐ (V: thường)

(+) S + V2/ed 

(-) S + didn't + V1 

(?) Did + S+ V1?

DHNB: ago, last (year, month ...), yesterday, in + năm QK, ...

-------------------------------------------------

41. has already been 

DHNB: already (HTHT)

42. haven't met / said 

HTHT + since + QKD

43. saw / was reading 

When + QKD, QKTD

44. was practising / rang 

QKTD + when + QKD

45. died / have never seen 

DHNB: ago( QKD), since (HTHT)

46. used 

Would you mind + if + S + V2/ed? xin phép ai làm gì (1 cách lịch sự)

47. were you doing / met / was waiting 

QKTD + when + QKĐ

48. didn't smoke 

S + would rather + S + V2/ed 

49. didn't go / was

DHNB: yesterday (QKD)

50. did you buy / bought 

DHNB: yesterday morning (QKD)

`color{orange}{~MiaMB~}`