Has is used only for the third person singular number ie. ' He has, She has, it has' . Have is used for: first person that is ' I have For second person -' you have' , For plurals - 'we have , they have'

For the third person you use has in the present tense. For example: Evelin has a book in her hands. Jack has a dog. For I, we, you, they we use have : We have two rooms in our flat.

these are the use of HAVE: I you we HAVE they he she HAS it 1. HAVE (POSSESION): - she has a beautiful car (normally never contracted) 2. HAVE TO (sinonym of MUST): - you have to do your homework (normally never contracted) 3. HAVE (AUXILIARY FOR PRESENT PERFECT) - she has been to New York (also used in contractions. Example: she's been to New York) - you've done a good job (you have done a good job) there are some other use of HAVE, but these are the most common