Learn how to make questions with the verb TO HAVE.

I have a car - Do I have a car? - Yes, I do / No, I don't
You have a car - Do you have a car? - Yes, you do / No, you don't
He/She has a car - Does he/she have a car? - Yes, s/he does / No, s/he doesn't
We have a car - Do we have a car? - Yes, we do / No, we don't
You have a car - Do you have a car? - Yes, you do / No, you don't
They have a car - Do they have a car? - Yes, they do / No, they don't