1. They know us but they do not know our son.
2. We know them but we do not know their son.
3. I know her but i do not know her son.
4. She and I, often play tennis together.
5. I am going to London with him and his sister on saturday.
6. Where are our cups ? They are in the kitchen.
7. I do not see her often, i write to her every week.
8. Come with us, our car is very comfortable.
9. Their neighbours do not talk to them.
10. Our neighbours do not talk to us.
