How do you know when to use who or whom?
‘Who’ replaces the subject of a clause or sentence.
‘Whom’ replaces the object in a sentence.
How do I decide?
Replace ‘who’ with he, she, or they.
Replace ‘whom’ with him, her, or them.
Can you tell me (who, whom) turned in their outlines?
Answer: They turned in their outlines. The answer is ‘who.’
Do you know for (who, whom) these flowers were sent?
Answer: The flowers were sent for them. The answer is ‘whom.’
For (Who or Whom) are you voting?
Answer: You are voting for them. The answer, then, is ‘whom.’