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