Choose the correct options

Must is used to say that something is necessary when the speaker himself decided so (is used only for present and future actions).

I must eat more vegetables. (I say so.)

Have to is used when the necessity comes from outside the speaker or when others decide for him.

I have to eat more vegetables. (The doctor says so, the doctor decides for me.)

Have to forms its questions and negations with do/does (Present Simple), did (Past Simple) and will (Future Simple).

A: Did you have to work late last week?

B: Yes, I had to finish my monthly report.

Mustn't is used when something is forbidden.

You mustn't be late for school.

Don't/didn't/won't have to are used to say something is not necessary in the present/past/future.

You don't have to take an umbrella. It is not going to rain.

1. A: Will you go out tonight?

   B: No, I can't. I [must|mustn't|don't have to] write an essay for school.

2. Mum, can I watch TV now? I [must|mustn't|don't have to] do any homework.

3. I have decided to go on a diet, so now I [have to|mustn't|don't have to] eat vegetables every day.

4. I have enough cash, so I [can't|mustn't|don't have to] go to the bank.

5. You [must|mustn't|don't have to] park your car here. It's a pedestrian area.

6. We [must|mustn't|don't have to] do a lot of washing-up after the picnic if we use plastic dishes.

7. I can do the shopping alone. You [must|mustn't|don't have to] accompany me.

8. The swimming pool is not free. You [have to|mustn't|don't have to] buy a ticket.

9. Bobby, you [must|mustn't|don't have to] ride a bike across the street without looking first. It's very dangerous!

10. Molly [must|mustn't|has to] see the head teacher after History class because she was rude to a classmate.