The verbs have and has are used to say what people own or possess. They are also used to talk about things that people do or get, such as illnesses. These words are the simple present tense of the verb have.
He has a lot of stamps.
She has long hair.
Our house has large windows.
I have a younger brother.
We have art lessons on Mondays.
Have a cookie, if you like.
Use has with he, she, it, and with singular nouns. Use have with I, you, we, they, and with plural nouns.
Kaynak: Basic English Grammer Book1