Do you like him? Yes, I do.
Can I go there? No, you can't. Yes, you can.
Are you happy? Yes, I am.
!! Does your dad write books? No, he doesn't. Yes, he does.
Is he your best friend? Yes, he is. No, he isn't.
Do they have pets? No, they don't. Yes, they do.
Do you go on holiday? Yes, I do / No, I don't.