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Obligation, necessity and permission

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  • ____ is used to tell oneself what is necessary.
    must
  • _______ + ________ is used to talk about an action which was unnessary, but was performd.
    needn't have + past participle
  • ____ is used to express necessity.
    need to
  • ______ is used to talk about something that is not permitted.
    must not or mustn't
  • _____ (positive) and _____ (negative) are used to express obligation or give advice.
    should, shouldn't
  • _____ is used to give ver strong advice.
    must
  • _____ and _____ are possible for general permission in the past.
    could, was/were allowed to
  • to express permission it is possible to use ______ or ______ or ______.
    can, may, be allowed to
  • ____ usually has the same meaning as 'should'.
    ought to
  • ____ is used for strong obligations imposed by the speaker (internal obligation). The speaker uses this modal verb to express his/her authority.
    must
  • You can use _____ or ______ or ____ when giving permission not to do something.
    needn't, don't need, don't have to
  • ______ is used to give very strong advice about what not to do.
    must not or mustn't
  • to talk about general necessity we use _____.
    don't need to
  • ____ is used in signs and notices indicating rules and laws
    must
  • We can only use __________ when referring to a particular situation in the past.
    was/were allowed to
  • _____ is used to express obligation, particularly when this is imposed by someone else or by external circumstances (external obligation).
    have to
  • _______ is used to express a lack of necessity.
    don't need to / needn't
  • ______ does not have a past form. We use _______ instead.
    must, have to
  • _____ + _____ is used to talk about an action which was unnecessary, but usually indicates that the action was not performed.
    didn't need to + infinitive
  • ____ is used to express lack of obligation.
    don't have to