2. This is Sam's car.

It's his car.

This car is his.

3. This is grandpa's house.

It's his house.

This house is his.

4. This girls ball.

This is their ball.

This ball is theirs.

5. It's a police dog.

This is his dog.

This dog is his.

6. This is mother's radio.

This is her radio.

This radio is her.