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Unit four

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  1. Doing the right thing Unit four

  2. Answers 1) I can't go. I shouldn't go. I mustn't go. I don't have to go. 2) Can I go? Should I go? Must I go? Do I have to go? 3 ) He / She can go. He / She should go. He / She must go. He / She has to go.

  3. Use

  4. Answers : • I am allowed to/ can ... mean the same . They express permission . • I have to... expresses obligation. • Answers • Children have to go to school. • Millionaires don't have to work. • You don't have to go to England if you want to learn English. • In England , you have to drive on the left.

  5. Answers • 2) I don't have to wear a uniform. • Do I have to wear a uniform. • I had to wear a uniform. • 3 ) She doesn't have to work hard . • Does she have to work hard1 • She didn't have to work hard. • 4) He can't do what he likes. • Can he do what he \ likes? • He couldn't do what he liked. • 5) We aren't allowed to wear jeans. • Are we allowed to wear jeans? We were allowed to wear jeans.

  6. Answers • The sentence with must expresses strong obligation . • Should and must are model auxiliary verbs .

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