must, duty / strong obligation / strong advice, mustn't, prohibition, have to, strong necessity / obligation, don't have to, lack of necessity / obligation, should, advice, ought to, advice/, can, permission / possibility / suggestion / request, can't, prohibition / impossibility, may, permission / possibility, might, possibility, could, possibility / polite permission, need to, necessity, needn't, lack of necessity/, don't need to, lack of necessity

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