Выразите запрещение при помощи отрицательной
формы глагола “must” (mustn’t)
You mustn’t do it Вы не должны (вам нельзя) этого делать
to come late to your classes; to miss your English classes; to make noise
here; to talk at the lectures; to read in the darkness; to call him so late; to smoke
in the children’s room;