Word/Phrase: quien eres tu
Translation: who are you
Pronunciation: kiˈen ˈeɾes tu
Who are you? - ¿Quien eres tu?
I do not know who you are. - No sé quien eres.
Can you tell me who you are? - ¿Puedes decirme quien eres?
I wonder who you are. - Me pregunto quien eres.
It is important to know who you are. - Es importante saber quien eres.