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Use Must+ Infinitive to talk about rules and obligations. Eg. You must turn off your mobile phones before coming into class. UseHave to + Infinitiveto talk about rules and obligations or to say something is necessary. Eg. We don’t have to wear a uniform at this school. You can use mustn’t or can’t to talk about rules. Eg. You mustn’t park here. You can’t smoke here. |
1. Exercise 1. Complete the sentences with have to, don’t have to, or mustn’t. [1.5c, p125]
a) You _____touch those animals. They are dangerous.
b) We _____ take the bus to school. It’s too far to walk.
c) The concert is free. You _____ pay.
d) In Britain you ____ drive on the left.
e) We _____ to study tomorrow. It’s a holiday
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Useful expressions | | | Exercise 2. Complete the sentences with necessary words, use the pictures. |