Question

giúp  mk với tí mk phải gửi bài cho cô rồi

Answer 1

Ex1:
1. might have
2. had to 
3. didn't have to
4. could
5. shouldn't have
6. couldn't have
Ex2:
1. don't have to
2. must
3. Do you have to /don't have to / must
4. do not need to / must

Answer 2

help

 

Answer 3

Ex1:

1, might have

2, had to

3, didn't have to

4, could

5, shouldn't have

6, couldn't have

Ex2:

1, don't have to 

2, must

3, Do you have to - don't have to - must

4, do not need to - must