1. I have a computer game. Do you have one?
2. We don't have a computer game.
3. — Do they have a computer game?
— Yes, they do., they don't.
4. He has a dog. It eats a bone every day.
5. She doesn't have a dog.
6. — Does he have a dog?
— Yes, he does., he doesn't. 是的,他有。/不,他没有。