Modals of obligation & prohibition

No thanks. I shouldn’t/mustn’t eat any more cake. I’m on a diet.

• shouldn’t

• mustn’t

• both

You mustn't/don't have to tell anyone what I've told you. It's a secret.

• mustn't

• don't have to

• both

Living at home is great. I don't have to/mustn't do anything. My Mum does it all for me!

• don't have to

• must

• both

You must/have to get a visa if you want to go to Cuba.

• must

• have to

• both

You ought to/have to pay a fine if you don't return your library books on time.

• ought to

• have to

• both

Jerry doesn't have to/mustn't get up early this morning. He isn't working.

• doesn't have to

• mustn't

• both

It's Hannah's birthday tomorrow. I mustn't/shouldn't forget to phone her.

• mustn't

• shouldn't

• both

You mustn't/don't have to touch electrical things when your hands are wet.

• mustn't

• don't have to

• both

I think you should/must go to bed early. You look tired.

• should

• must

• both

When I was a child, I had to/must tidy my room every weekend.

• had to

• must

• both