If Subject is Third Person Singular like He, She, It and Singular names like Ram, Suresh , Jovika etc., we use has in present perfect tense as a auxillary verb or in simple present as a verb (possessive). Simple Present : He/She/It/Ram has a car. For the rest, we use 'Have'. I/We/They/You have a car. Present perfect: He/She/It/Ram has gone to market. I/We/They/You have gone to market. We use "Has" in present perfect tense in the same cases we use "is" is in present continuous.