1. You don't have to

2. has to

3. mustn't

4. don't have to

5. mustn't

6. must

7. mustn't

8. doesn't have to

9. don't have to

10. mustn't

1. You don't have to worry about her! She's all right now! (bạn không cần phải lo lắng...)
2. He's very il, he has to stay in bed. (cần phải nhưng chủ ngữ số ít nên chia là has)
3. Children mustn't play in this dangerous place.  (trẻ con không được phép chơi ở nơi nguy hiểm)
4. We are on Saturday! We have to to get early! (cần phải dậy sớm)
5. You mustn't forget your dictionary for the exam! (không được phép quên từ điển)
6. Old people have to be helped. (cần được giúp đỡ)
7. You mustn't forget your dictionary for the exam! (không được phép quên từ điển)
8. She doesn't have to choose if she doesn't want to! (không phải chọn nếu cô ấy không muốn)
9. They are happy because they don't have to wear a uniform in their new school. (không cần phải)
10. The river is too deep, you mustn't swim here! (không được phép)

xin hay nhatt