Mi a különbség a "who" és a "whom" között?

A whom az a who tárgyesete: who = kit?/akit, to whom = kinek?/akinek, with whom = kivel?/akivel, stb.

De ezeket ma már csak a leghivatalosabb formában használják, azon kívül mindenhol felváltotta simán a who:

She is the girl who has a car.

She is the girl who I saw yesterday. = She is the girl whom I saw yesterday.

She is the girl who I gave the keys. = She is the girl to whom I gave they keys.

She is the girl who I danced with. = She is the girl with whom I danced.

She is the girl who I told you about. = She is the girl about whom I told you.

A whom-os alakokat a köznyelv már nem használja, nyelvvizsgán sem kell használni, legfeljebb felismerni és megérteni kell tudni.

A who alany, a whom tárgy.

A who's az a who is rövidítése. Szóval pl. Who's this -> Who is this -> Ki ez?

A whose a birtokos.

Ó anyám.

Nem Whose this bag?, hanem Whose IS this bag?

Alternatíva a Whose bag IS this?