Is these sentences are correct for using "a"
The old man does not have a black hair. He has whit hair. The woman does not have long blond hair. She has short red hair. The boy does not have hair. He is bald. The girl does not have curly hair. She has straight hair. I don't have long red hair. I have long black hair. You don't have blond hair. You have brown hair.
Please advice me.
Thanks for all.