Перепишите предложения в пассивном залоге обратите внимание на употребление модальных глаголов в пассивных конструкциях

1. Children's toys may be taken to the class.

2. They must be warned about the danger.

3. The door shouldn't be left unlocked.

4. Tom should be taught good manners by his parents.

5. Pupils' books have to be brought to school.