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nếu câu trả lời hữu ích nhé!
1.When I was walking to school, I saw John.
2.When I was helping in the kitchen, Mary came.
3.While she was cooking , the children were playing.
4.While they were playing cards, the baby was sleeping.
5.When I was working, my uncle called.
6.Carol was watching TV while Bob and Peter were playing football.
7.When she was washing her hair, the baby started to cry.
8.A strong wind was blowing when the plane landed.
9.When she was playing tennis, it began to rain.
10.When I was watching TV, the lights went out.
11.While he was playing the piano, she was listening to him.
12.While she was tidying her room, he was washing his car.
13.The boys were helping in the garden while she was watering the flowers.
14.He met Mary when he was walking through the park.
15.We were playing computer games while she was reading a book.
Hãy giúp mọi người biết câu trả lời này thế nào?

`Đáp` `án:`
1. was walking / saw
2. was helping / came
3. was cooking / were playing
4. were playing / was sleeping
5. was working / called
6. was watching / were playing
7. was washing / began
8. was blowing / landed
9. was playing / began
10. was watching / went
11. was playing / was listening
12. was tidying / was washing
13. were helping / was watering
14. met / was walking
15. were playing / was reading
-----------------------------------------------------
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)
--> Diễn tả hành động xảy ra song song / cùng lúc
DHNB: at + giờ + thời gian trong QK, at this time + thời gian trong QK, ...
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, ...
Hãy giúp mọi người biết câu trả lời này thế nào?
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