From Wiktionary
who is on the Basic English 850 List.
white - who - why
who is one of the 1000 most common headwords.
white - who - whole




  1. (relative) You use who to add a clause to explain more about the person or people you're talking about.
    They are good people who are working hard.
    We saw Kim, who was in his car.
    We asked everybody who was there.
    It was you who lost the keys, not me.
  2. (question) You use who to ask about a person or people.
    Who was on the phone?
    Who's your new teacher?
    Who did you meet today?
    He told me who was there.
    I'll ask who can help us.