为什么用whom 而不用who

Jack (whom) I teach is lazy 这句中为什么用whom而不用who 英语定语从句；为什么用whom不用who? whom are you looking for 为什么是用 whom 为什么不用who the man whom i saw told me to come back today.为什么用whom.不用who Do you know who this dictionary belongs to?为什么用who,不用whom Mum,this is kate,who I knew in Paris.为什么用who不用whom? 这句话为什么用who 不用whom啊 .who does this book belong to? 为什么No matter who you are.的who不用whom 为什么用who is it 而不用who are you? She's the only one who's studying Frence?为什么用who,而不用that? Who looks after Rose 为什么这里要用looks而不用Who does look after Rose do you know the person to whom I am talking.为什么不用who