1)this is the children's room.
2)These are the boy's families
3)These are the leaves of the tree.
4) That's mum's dress.
5)This is John's book.
6)Those are the lady's shoes .
Объяснение:
употребление is означает кому-то относящиеся.
к примеру1)this is the children's room.. children is будет просто сократили и поэтому childre