1) It`s my bag. It`s mine.
2) It`s John`s bag. It`s his.
3) Let`s play. This is my doll and that one is yours.
4) We study English. I like my teacher.
5) Mary has a dog. Her dog is very old.
6) It`s Mary`s dog. It`s hers.
7) These are your books and those ones are mine.
8) Take this pen. No, it`s not mine.
9) We live in this house. It`s our house. It`s ours.
10) They have a new car. Look, it`s their car. It`s theirs.