Has- is a 3rd person form of "have". He has a sports car.
Have - is a verb as well as a helping verb (sometimes called auxiliary word). i.e. I have fishing boat.They have a big house.
Have- also is needed to form present perfect tense. i.e. I have lived in California for 5 years. You need to study this form if you are not sure, because it'd take more a few posts to expalin the nu