PRESENT PERFECT PASSIVE Exercise 5: Change into Passive Voice Example: I think I ought to help you find your raincoat. Don't worry about it. It has already been found. 1. I think I ought to help you wash the dishes. 2. I think we ought to post that letter to Dr Davis. 3. I think I ought to give him some money. 4. I think I ought to repair the typewriter.

1. You must'nt use your smartphones in class.

2. you must do your homework in time.

3. you mustnt chewing gum is forbidden at school.

4. You must to respect the teachers and other students.

5 Mustnt forget to stand up when your teacher enters a classroom.

6. Must'nt cheat in exams.

7 mustnt running in the school corridors is forbidden.

8. Remember you must to be quiet in the library.

Преобразуйте данные предложения, используйте mustили mustn’t.

1. You must not use your smartphones in class.

2. you must make sure you do your homework in time.

3. You must not chewing gum is forbidden at school.

4. Must to respect the teachers and other students.

5. You must don’t forget to stand up when your teacher enters a classroom.

6 you must not cheat in exams.

7. must not Running in the school corridors is forbidden.

8. Remember must to be quiet in the library.