Living at home is great. I mustn't / don't have to do anything because my mum does it for me.
don't have to
Excuse me, do you think you _______ help me with my bags?
could
You ought to / have to pay a fine if you don't return your library books on time.
have to
I think you should / must go to bed early tonight.
should
It's Hana's birthday tomorrow. I mustn't / shouldn't forget to phone her.
mustn't
We won't _______ to meet tonight, I'm working.
be able to meet
He _______ play the piano when he was only four years old.
could / was able to (formal)
I like ______ do what I want when I'm on holiday.
being able to
I've never been able to / could dance well, though both my parents are good dancers.
been able to
When you open the photocopier, you mustn't / don't have to touch this part here; it's very hot.
mustn't
If you are late to class you ought to / should say sorry to the teacher.
both
I've invited Mark to the party, but I don't think he'll ________ come.
will be able to
You mustn't / don't have to touch electrical things when your hands are wet.
mustn't
Jerry doesn't have to / mustn't get up early this morning. He isn't going to work.
doesn't have to
Jerry doesn't have to / mustn't get up early this morning. He isn't going to work.
doesn't have to
You mustn't / don't have to tell anyone what I've just told you. It's a secret.
mustn't
I started reading Harry Potter, but I _________ finish it. It was too long.
couldn't/wasn't able to
No thanks. I mustn't / shouldn't eat any more cake. I'm on a diet.
both
When you drive across many European Union borders, you mustn't / don't have to show your passport.
don't have to
I wasn't able to / couldn't find the time do much homework.
both
You must / have to get a visa if you want to go to Cuba.
both