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Упражнение 2. Сделайте данные предложения, в которых есть модальные глаголы, отрицательными.

You must read in bed.
You can cross the road when the lights are red.
You should open the window. It is cold outside.
It is already late. She must go outside.
He should dress so formal if he goes to a picnic.
You must keep books at home so long.
You can park here.
Students may shout at the lessons.
Teachers may be late for school.
Parents must obey their children. (obey — слушаться)