Rewrite sentences in the passive with full verb forms. Pay attention to the use of modal verbs in passive structures. (Перепиши предложения в пассивном залоге. Обрати внимание на употребление модальных глаголов в пассивных конструкциях.)
Children may take their toys to the class.
Children’s toysto the class.
1. Someone must warn them about the danger.
Theyabout the danger.
2. You should not leave the door unlocked.
The doorunlocked.
3. Tom’s parents should teach him good manners.
Tomgood manners by his parents.
4. Pupils had to bring their books to school.
Pupils’ books... to school.