Interactive Grammar: Modals for Obligation, Prohibition and Advice

1It is forbidden to use flash photography here. → → Use 'mustn't'

2Attendance is optional — you can choose. → → Use 'don't have to'

3I think you need more sleep. → → Use 'should'

4It is compulsory for staff to wear a badge. → → Use 'must'

5Leave now or you will miss the last bus. → → Use 'had better'

6Eating junk food is not a good idea. → → Use 'shouldn't'

7I would advise her to see a doctor. → → Use 'ought to'

8Parking here is not allowed. → → Use 'must not'

1You mustn't to attend — it is optional.

2She musts wear a uniform.

3You should not to eat so late.

4He ought to called the bank.

5You mustn't not enter this area.

6You had better to leave now.

7She don't have to come if she is unwell.

8Must you to sign in every morning?

9You shouldn't eating too much sugar.

10Visitors mustn't not bring outside food.