I have a car

[F.K]

Hi,
a)I have a car.
b)He has a car.

Now choose:
a)
-I don't have a car.
-I haven't a car.

b)
-He doesn't have a car.
-He hasn't a car.

Thank you

[Donbelid]

I like using "do" better:

She doesn't have a car.
We don't have a car.
so on.

Because have (to own something) is not an auxiliary verb.

As far as I know Americans use the same form even in their daily conversations.