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5 Look back at the conversation. Who says what? Grammar Must/Mustn’t
1 Can I help you? Assistant
2 Where is this bag from?
3 Have you got any other bags? Affirmative and Negative
4 Here you are. I/You/He/She/It/We/They must be careful.
5 I’ll take it.
I/You/He/She/It/We/They mustn’t (must not) eat
6 Read the shopping phrases. in the shop.
Working in a shop Asking for help in a shop
Grammar reference Workbook page 96
Can I help you? Have you got a/any …?
1 Study the grammar table. Choose the correct
Here you are. How much is it/are they?
options to complete the rules.
It’s £7. / £10. / £25. That’s cheap! I’ll take it/them. 1 We can use must and mustn’t to talk about
rules (obligation).
That’s expensive!
2 We can use must / mustn’t to say that it is
I don’t want it/them, thanks. a good idea to do something (strong advice).
3 We use must / mustn’t to say that
someone can’t do something because it
7 2.35 Listen to the conversation. Act out the is not allowed (prohibition).
conversation in pairs.
Assistant Can I help you?
Zak Yes, please. Have you got any 2 Choose the correct options.
1 baseball caps ? 1 You must / mustn’t leave rubbish in the street.

Assistant Yes, we have. We’ve got lots of Put it in the bin!
them. Here you are. 2 It’s late. I must / mustn’t go home now.
Zak Great. How much is it? 3 We must / mustn’t pollute rivers. It’s bad for
2
Assistant It’s £5. the environment.
4
3
Zak That’s cheap. I’ll take it. Thanks. 4 When you are driving, you must / mustn’t stop

at a red light.
8 Work in pairs. Replace the words in purple in 5 Shh! We must / mustn’t talk in the library.
Exercise 7. Use these words and/or your own
ideas. Act out the conversation. 3 Look at the shop signs. What do they mean?
Make sentences with must or mustn’t .
Can I help you?
Yes, please . Have you
got any pens?

Yes, we have.

1 eat or drink 3 pay here
You mustn’t eat or drink.
1 bags / notebooks / pens / T-shirts

2 £20 / 95 pence / £1.25 / £7
3 expensive

4 I don’t want it. / I don’t want them.

2 use a mobile phone 4 touch things in the shop

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