1. This is your book. - This book is yours.
2. That is her dog. - That dog is hers.
3. This is his pen. - This pen is his.
4. Those are not my children. - Those children are not mine.
5. Are these her pencils? - Are these pencils hers?
6. This is his typewriter. - This typewriter is his.
7. This is our house. - This house is ours.
8. That is their house. - That house is theirs.
9. Is this your pencil? - Is this pencil yours?
10. This is my pen. - This pen is mine.