Exemples :

Are you hungry ? Yes, I am.
Does she play the piano ? Yes, she does.
Is she your sister ? No, she isn't.
Do you like broccoli ? No, I don't.
Is it your dog ? Yes, it is.
Can they speak french ? No, they can't.
Is there any milk in the fridge ? Yes, there is.
Has she got a brother ? No, she hasn't.