Obligation, prohibition, necessity
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What is the difference between must have and had to?
The use depends on whether we want to express obligation or if we want to say how certain we are about the probability of something happening.
The modal verb must has two past tense forms. Name them.
The modal verb must has two past tense forms: had to and must have.
Are these sentences correct? 1. It is not permitted to smoke in the kitchen//2.It is not allowed to smoke in the kitchen
Swan Practical English Usage says It is not permitted to smoke in the kitchen is correct, but it is not possible to say It is not allowed to smoke...
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