u/Adventurous_Food1417

I have a dictionary with basic korean words and these I found out that "whose" in korean will be 누구 거 (whose thing, I guess). and I wonder if we could say 누구 거예요/누구 것임니다? and can we say 누구의 거예요?

ps sorry if this such a stupid question, I want to check myself if I'm right ㅠㅠ