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Permission, obligation and prohibition

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  • "You mustn't/don't need to drive, we can get a train"
    Don't need to
  • "You ought to/can take warm clothes with you to Dublin"
    Ought to
  • "You don't have to/mustn't use your phone in quiet zones"
    Mustn't
  • "You ought not to/don't have to go to the party if you don't want to"
    Don't have to
  • "My sister is a nurse, so some weeks she has to/may work nights"
    Has to
  • "You ought not to/can't drink so much coffee"
    Ought not to
  • "When I was at school I had to/must wear an ugly uniform"
    had to
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