If they say in a way of a sentence, it would be; "You are a doctor"
If is a Question; "Are you a doctor?"
what are you?
Tú eres = You are
Well, first of all, it should be "ella es una doctora" and it means "she is a doctor."
de donde eres = where are you from
"Where is the (female) doctor from?"
you are
"Hola quien eres" translates to "hello who are you" in English.
"Tu eres linda" means "you are beautiful" in English.
It is masculine for "you are mean".
"Where is the (female) doctor from?"
"Tu eres mi mundo" in English means "You are my world."
It's you