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Modals of obligation

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  • mustn't
    in a swimming pool
  • shouldn't
    in a desert
  • must
    in a building on fire
  • must
    on the beach
  • should
    during a zombie apocalypse
  • mustn't
    at a petrol station
  • don't have to
    on an airplane
  • shouldn't
    at the zoo
  • mustn't
    in a national park
  • mustn't
    on social media
  • must
    at school
  • mustn't
    during an earthquake
  • don't have to
    at work
  • don't have to
    in a library
  • shouldn't
    in a lift
  • must
    at airport security
  • don't have to
    in a church
  • shouldn't
    in a museum
  • have to
    in a luxury hotel
  • must
    on the motorway
  • have to
    in a supermarket
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