WHO: 1.what person or persons?: Who did it?
2.(of a person) of what character, origin, position, importance, etc.: Who does she think she is?
3.the person that or any person that (used relatively to represent a specified or implied antecedent): It was who you thought.
4.(used relatively in restrictive and nonrestrictive clauses to represent a specified antecedent, the antecedent being a person or sometimes an animal or personified thing): Any kid who wants to can learn to swim.
5.Archaic. the person or persons who.
WHOM: 1.the objective case of who: Whom did you call? Of whom are you speaking? With whom did you stay?
2.the dative case of who: You gave whom the book?
Hi, teacher i would like,know what is the difference between WHO and WHOM, were should i use them.
You'll probably never need "whom" in Australia, at least in speech or informal writing. It's OK for formal writing.
The only place it's still commonly used here is after a preposition: to whom, with whom. "To whom did you give the book". But even this is uncommon. Most people would say "Who did you give the book to?"
I've never heard anyone say "You gave whom the book?"
But the answer about usage would depend on who(m) you ask.