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Mustn't, don't have to, needn't 9 Look at the information about a job. Complete
the sentences with the correct form of have to.
Mustn't and don't have to have different meanings.

We use mustn't, especially in rules, to say something Looking for a summer job?
is not permitted.
You mustn't walk on the gross. (= Don't walk on the grass.)
Work on our summer camp in South America.
You mustn't go in there. It's dangerous.
I mustn,t eat that chocolate. I'm going to have dinner
in a minute.
We use don't have to to say something is not
obligatory.
We don't have to walk. We can go in the car.
We don't have to go to the cinema. We can stay at my
house and watch a DVD.

We can use needn't in the same way as don't have to.
We don't have to walk. = We needn't walk.
We don't have to go to the cinema. = We needn't go
to the cinema.

Note: the negative form needn't is a modal verb and Essential Not essential
is followed by the infinitive (without to). The affirmative
speak English speak Spanish
and question forms of need are followed by to + the
infinitive. be enthusiastic have a degree
You needn't wait.
have previous
Do I need to wait? like children
experience
You need to wait.
be over 18 be able to drive
enjoy outdoor
8 Look at the signs at a swimming pool. Write rules activities play sport
with must or mustn't and the words in the box.
work for at least four
stay all summer
weeks
ÿ ÿ

You don't have to speak Spanish.
You speak English.
You play sport.
You enjoy outdoor activities.
A You have a degree.

be enthusiastic.
You
6 You like children.
7 You have previous experience.
eat food have a shower jump run
8 You stay all summer.
take photos smoke use rubbish bins
9 You work for at least four weeks.
wear shoes
10 You be able to drive.
ÿ You mustn,t yv
1
2
3
4
5
6
7

Unit 16 91