It has 2 forms in the present tense (simple present tense), As :-
1- Basic Form/Verb (have) : to show 2 things :
a) Possessions (ownership of something) : (ex: a car, nice hair, children, etc.)
b) Actions : (ex: Shower, Dinner, Meeting, etc.)
2- Helping Form/Verb : (ex: have done homework)