Difference between "does have" and "has" [duplicate]

Based on my understanding as a native speaker (London, England), normally you would say "she has a car."

However, if you want to emphasize that it's not true to say the she does not have a car, then you would say that she does have a car.

For example:

How can Jane get there?
She has a car.

not:

How can Jane get there?
* She does have a car.

But:

Does Jane have a car? Yes, she does.

She doesn't have a van, but she does have a car. (Also correct: She doesn't have a van, but she has a car.)

In general, the difference between has and does have is simply that including the modal auxiliary verb do adds emphasis (which can also be achieved by intonation alone, but let that pass for now).

Thus, "She does have a car" might validly be used in various contexts. For example

• surprise the speaker didn't previously realise she had a car, and he's just seen her drive past.

• exasperation "We can't expect her to walk all the way to our house". "She does have a car!"

• refutation "She lost everything in the flood". "Not quite - she does have a car."

etc., etc.

British speakers often use get as the auxiliary verb - "She has got a car" - again, adding emphasis.