Who vs. Whom
Rule. Use this he/him method to decide whether who or whom is correct:
he = who
him = whom
Example: Who/Whom wrote the letter?
He wrote the letter. Therefore, who is correct.
Example: Who/Whom should I vote for?
Should I vote for him? Therefore, whom is correct.
Example: We all know who/whom pulled that prank.
This sentence contains two clauses: we all know and who/whom pulled that prank. We are interested in the second clause because it contains the who/whom. He pulled that prank. Therefore, who is correct.
Example: We wondered who/whom the book was about.
This sentence contains two clauses: we wondered and who/whom the book was about. Again, we are interested in the second clause because it contains the who/whom. The book was about him. Therefore, whom is correct.
