4 don't go 

5 was playing - entered

6 was studying -came

7 bake

1 starts

2 doesn't play

3 likes

1 start 

2 Doesn't play

3 Likes

1 starts

2 doesn't play

3 likes

4 don't go

5 was playing - entered

6 was studying - came

7 bake

8 don't do

9 writes

10 doesn't arrive

1 have held

2 is sleeping

3 has lived

4 cried

5 Have you seen

6 has finished

7 were

8 are making

9 is running

10 is

11 went

12 writes

13 was playing

14 are doing

15 has just come

16 will come

17 did you go

18 haven't left

19 will come

20 met

21 bloom

22 haven't lived

23 haven't seen

24 hasn't drunk

25 is going to rain

26 were

27 hasn't finished

28 have just made

29 has used

30 was doing

31 are using

32 haven't seen

33 has just opened

34 died

35 Have you seen

36 have

37 won't use

38 haven't seen

39 saw

mustn't

- must + V: phải làm gì (mang tính bắt buộc)

- mustn't + V: cấm làm gì, buộc người khác không được làm gì

mustn't

ở đây sẽ mang nghĩa theo ý thức của người nói

6. The children don't need to have all of these books to start the course.

7. We need them completed to report on Friday.

8. My mother wants me to stay at home after 9.00 pm.

9. My parents always encourage me to work hard at school.

10. The increase in oil price will certainly affect other fields.

1 The children don't need to have all the books to start the course

2 We need them to complete the report on Fiday

3 My mother wants me to stay at home after 9.00 pm

4 My parents always encourage me to work hard after school

5 The increase in oil price will certainly affect the other fields