Các anh chị giúp em với. huhu

12 lived

13 could play was

14 left

15 met was doing

16 was paying heard

17 turned saw

18 was wearing saw

19 decided

20 was picking cut

21 left said

22 lit was still burning

23 was walking attacked

24 arrived was having had

25 did you think liked

26 realized was traveling

27 was playing opened threw

28 didn’t allow was blowing

29 knew were looking hid went

30 came were sitting was doing was knitting was

`-` QKTD while/when/as QKD: hành động đang tiếp diễn, hành động quá khứ khác xen vào 

`-` QKTD while/when/as QKTD: hai hành động xảy ra cùng lúc trong quá khứ 

`->` Thì QKTD: S + was/were + V-ing 

`->` Thì QKD: S + V-ed