1. I have a book. It is my book. The book is mine.
2. Do you have a book? - No I don't. Well then it is her ( his ) book. The book is hers ( his ).
3. She has a passport. It is her passport. The passport is hers.
4. He has a bicycle. It is his bicycle. The bicycle is his.
5. The dog has a bone. It is its bone. The bone is its.
6. We have a tutor. It is our tutor. The tutor is ours.
7. They have a boat . It is their boat. The boat is theirs