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When + QKĐ , QKTD

While + QKTD, QKĐ/QKTD

QKĐ: mô tả về 1 hđ trong quá khứ

S + V2/ed + O

QKTD: mô tả về 1 hđ diễn ra liên tục trong quá khứ

S + was/were + V-ing + O

41. was listening

42. came

43. was cooking

44. were picking up

45. was cooking

46. rang

47. arrested

48. was washing / were cleaning

49. was playing / arrived

50. was being / enjoyed

#kenleweb13

Công thức thì QKTD 

(+) S + was/were + Ving 

(-) S + was/were+ not + Ving 

(?) Was/Were +S +Ving? 

--> Diễn tả hành động đang xảy ra ở 1 thời điểm nào đó trong quá khứ 

--> Diễn tả hành động đang xảy ra thì có hành động khác chen vào (while / when)

DHNB: at + giờ + thời gian trong QK, at this time + thời gian trong QK, …

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, …

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41. was listening

42. came 

43. was cooking

44. were picking up 

45. was cooking

46. rang 

47. arrested 

48. was washing / were cleaning 

49. was playing / arrived 

50. was / enjoyed 

`color{orange}{~LeAiFuRuiHuiBao~}`