who
1
used in questions to ask about the name or identity of one person or several people
- Who are those people sitting at the back?
- Who is going to pick up the kids from school?
- Who is helping you with your homework?
- Who is responsible for organizing the event?
- Who is that person standing near the door?
2
used to refer to people or animals with names
- The person who is standing over there is my brother.
- I met a woman yesterday who knows how to play the piano.
- The doctor who treated me was very kind.
- She is the friend who helped me through difficult times.
3
used to represent a person as the subject or object of verb or preposition in a sentence
- I know who did it.
- They will announce who gets the promotion.
- We discovered who wrote the mysterious letter.