EX3:
1. You don't need to clean the window
2. You shouldn't give him so much money
3. She musn't leave home at night
4. My friends may(maybe) join us on the trip 
5. You should get up early and do morning exercise

Bai sau

1. You do not need to clean the window
2. you should not give him..
3. ..go out at night
4. will join us
5. You should get up early
6. You must not smoke..
7. Could you please turn off the TV
8. Do you allow me to ask some ...

6. You musn't/ don't have to smoke in the museum
7. Could you turn off the TV? 
8. Do you allow asking some questions about the subject?
9. The boy musn't have broken the window
10. The road needs to be widened

1. shouldn't
2. don't have to/ mustn't
3. must
4. may
5. mustn't
6. Can
7. don't need to
8. Can/ can't
9. musn't/ don't have to
10. must
Ex3
1. You don't need to clean the window
2. You shouldn't give him so much money
3. She musn't leave home at night
4. My friends may(maybe) join us on the trip 
5. You should get up early and do morning exercise
6. You musn't/ don't have to smoke in the museum
7. Could you turn off the TV? 
8. Do you allow asking some questions about the subject?
9. The boy musn't have broken the window
10. The road needs to be widened