Possible Duplicate: What's the rule for using "who" or "whom"? Which is correct? A certificate is a statement that states who is entitled. A certificate is ...
Possible Duplicate: What's the rule for using "who" or "whom"? "Don't forget [who/whom] you're dealing with." I know the rules for who vs. whom, but I'm having ...
I understand that "who" is for the subject and "whom" is for the object. However, sometimes they are used as the only word in a sentence. For example: Person 1: Yeah, he ate the entire cake. ...