Obligation, necessity and permission | Baamboozle - Baamboozle

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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

_____ is used to give ver strong advice.

must

____ is used to tell oneself what is necessary.

must

____ is used in signs and notices indicating rules and laws

must

______ is used to talk about something that is not permitted.

must not or mustn't

______ is used to give very strong advice about what not to do.

must not or mustn't

______ does not have a past form. We use _______ instead.

must, have 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 lack of obligation.

don't have to

____ is used to express necessity.

need to

_______ is used to express a lack of necessity.

don't need to / needn't

You can use _____ or ______ or ____ when giving permission not to do something.

needn't, don't need, don't have to

to talk about general necessity we use _____.

don't need to

_______ + ________ is used to talk about an action which was unnessary, but was performd.

needn't have + past participle

_____ + _____ is used to talk about an action which was unnecessary, but usually indicates that the action was not performed.

didn't need to + infinitive

_____ (positive) and _____ (negative) are used to express obligation or give advice.

should, shouldn't

____ usually has the same meaning as 'should'.

ought to

to express permission it is possible to use ______ or ______ or ______.

can, may, be allowed to

_____ and _____ are possible for general permission in the past.

could, was/were allowed to

We can only use __________ when referring to a particular situation in the past.

was/were allowed to