11. When we watched/ were watching TV, Dad was arriving/ arrived home.
12. We weren't having/ didn't have dinner when you called us.
13. What did they do/ were

Question

11. When we watched/ were watching TV, Dad was arriving/ arrived home.
12. We weren't having/ didn't have dinner when you called us.
13. What did they do/ were they doing when the light went out/ was going out?
14. What was Max doing/ did Max do when you saw/ was seeing him?
15. I found my toy when I tidied / I was tidying my room.
16. Grandpa found/ was finding some old coins when he was working in the garden.
17. When the children were visiting/ visited the zoo, an elephant escaped/ was escaping.
18. What was you doing/ were you doing when the storm started/ was starting?
19. Kate was having / had dinner and then she did/ was doing her homework
20. While we were cleaning/ we cleaned the house, we broke / were breaking some

huutin202 · Answer

11. were watching - arrived
12. weren't having - called
13. were they doing - went out
14. was Max doing - saw
15. was tidying
16. found
17. were visiting - escaped
18. were you doing - started
19. had - did
     Chuỗi hành động trong quá khứ, thì quá khứ đơn: S + Ved/V2
20. were cleaning - broke
__
Các câu còn lại: Một hành động đang xảy ra trong quá khứ thì bị một hành động khác xen vào:
- When/While + QKTD, QKĐ
- QKĐ + when/while + QKTD
- QKTD + when/while + QKĐ
* Hành động đang xảy ra chia thì quá khứ tiếp diễn: S + was/were + V-ing
* Hành động xen vào chia thì quá khứ đơn: S + Ved/V2.

TuyenNguyen1908 · Answer

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, ...
-----------------------------------------------------
11. were watching / arrived
12. weren't having
13. were they doing/ went
14. was Max doing / saw
15. was tidying
16. found
17. were visiting / escaped
18. were you doing / started
19. had / did
20. were cleaning / broke

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