Ответ:

ex.1

2. Have to

3. dont have to

4. must

5. dont have to

6. mustnt

ex.2

2. Can

3. dont have to

4. may

5. must

6. shall

7. mustnt

8. should

ex.3

2. mustnt

3. dont have to

4. can

5. mustnt

6. dont have to

7. can

8. can

9. mustnt

Объяснение: