Переведите следующие предложения на русский
язык, обращая внимание на модальный глагол must
и эквиваленты модальных глаголов have to, be to:
1) They
must spend more time on their English.
2) You
must help her in every way possible.
3) He
will have to stay there for a month.
4) We
are to leave on Monday.