Listen everybody: The word "who" is a nominative.That means it is the subject in a sentence. Like "Who is it?" Who wants more cheesecake" Like that. Now, there is another form of this word, which is "whom". the word "whom" IS ALWAYS preceded by a preposition, like "to" or "for" or "with" . The use of the preposition changes "who" to "whom", but you will NEVER start a sentence with "whom", because there needs to be that preposition in position!! So, stop, all of you, using "whom" No where a nice "who" will do the trick. Maybe you are trying to sound "smart" or fancy, but you just sound uneducated. So, stop! I am getting acida!! No sentence starts with "Whom"!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! "Whom will they rob?",NOOOOOOOO! Who will they rob. Yesssssssssssssssssss!