Ai giúp em giải bài này với đang cần gấp ạ

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, ...
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Hành động xảy ra trong QK và kéo dài ⇒ QKTD

Hành động ngắn / cắt ngang ⇒QKĐ

When + QKĐ, QKTD

While + QKTD, QKĐ

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1. opened/ was raining 

2. was studying / suddenly felt 

3. were listening / phoned

4. was having / rang 

5. was going / started 

6. went / was reading

7. Were you thinking / called

8. were waiting / arrived

9. was climbing / began

10. was driving / saw 

12. was reading / went 

13. began / was cycling 

14. was walking / heard 

15. were playing / came

16. left / was still shining 

17. ran / was walking

18. were you doing / rang

19. were having / arrived

20. came / was sleeping

`color{orange}{~STMIN~}`

`-` When + S + Ved / V2 , S + was / were + V-ing

`-` While + S + was / were + V-ing , S + Ved / V2

`-` When + S + was / were + V-ing , S + Ved / V2

`=>` Dùng để diễn tả hành động đang xảy ra thì có hành động khác xen vào

`1`.opened / was raining

`2`.was studying / suddenly felt

`3`.were listening / phoned

`4`.was having / rang

`5`.went / started

`->` When + S + Ved / V2 , S + Ved / V2

`=>` Dùng để diễn tả `2` hành động đã xảy ra trong Quá khứ

`->` S + started / began + V-ing / to V ( `5 , 12` )

`=>` Đã bắt đầu làm gì ( `5 , 12` )

`6`.went / was reading

`7`.Were you thinking ? / called

`8`.were waiting / arrived

`9`.was climbing / began

`10`.was driving / saw

`11`.was reading / went

`12`.began / was cycling

`13`.woke / was

`14`.was walking / heard

`15`.were playing / came

`16`.left / was still shining

`17`.ran / was walking

`18`.were you doing / rang

`19`.were having / arrived

`20`.came / was sleeping

`\text{# TF}`