Grand Duke wrote:Can someone give me a basic rule to determine when to use "WHO" and when to use "WHOM"? It has always puzzled me. Thanks!
Yes. "Who" is used (as an interrogative pronoun?) as the subject of a sentence only.
example: Who did this?
Otherwise, use "whom"
example:
A frisky young miss from Khartoum
Took a ladyboy up to her room
As they lay on the bed
She turned and she said
Who does what, and with what, and to whom?
-But everyone breaks the strict rules now. For example, most would say "Who does this belong to" rather that the clunky "To whom does this belong", or worse "whom does this belong to" which sounds awful, but is correct, I believe.