20. entered/ was writing

When+ S+ Vqkđ,  S+ was/were+ Ving

21. got/put/went

liệt kê các hđ trong qk: qkđ: S+ Ved/cột 2

22. was/ had died

S+ Vqkđ after+ S+ had P2

23. was, wanted

qkđ: S+ was/were+ N/adj

S+ ved/cột 2

24. was working

at 4pm yesterday=> S+ was/were+ Ving

25. listened

last night=> qkđ: S+ Ved/cột 2

26. broke/ stole/ were dancing

S+ Vqkđ+ while+ S+ was/were+ Ving

27. had done

S+ had P2+ before+ S+ V qkđ

28. what did you do after you had gone

S+ Vqkđ+ after+ S+ had P2

29. will not come

tomorrow => tlđ: S+ will not+ V

30.was watching

at 8 last evening=>qktd:  S+ was/were+ Ving