Read the question John Barkers grandfather asked him

1) Can you play tennis?
Yes, I can. No, I can't.
2) Can pupils do athletics in your school?
Yes, they can. No, they cannot.
3) Are you and your sister good swimmers?
Yes, we are. No, we aren't.
4) Are you good at cycling?
Yes, I am. No, I am not.
5) Do you have an interesting hobby?
Yes, I do. No, I don't.
6) Are you interested in photography?
Yes, I am. no, I am not.
7) Do you have a pet?
No, I don't. Yes, I do.
8) Can you cook?
Yes, I can. No, I cannot.