Anonymous I wonder whether you can use "mustn't" in a sentence like this: Yes, but I don't think it has the meaning you want. If your children are sick, you mustn't send them to school. You must keep them at home until they have no fever.
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AnonymousI wonder whether you can use "mustn't" in a sentence like this:Yes, but I don't think it has the meaning you want.
AnonymousIf you don't clean your room right now, you mustn't take part in our next excursion to Dover.It's "may not", not "mustn't". Your suggestion of "won't be allowed" is also perfectly fine, and probably used more often than "may not".