The room was cleaned by Tom.对Tom提问,答案是Who was the room cleaned by?Who可不可以换成whom?为什么?
问题描述：
The room was cleaned by Tom.对Tom提问,
答案是Who was the room cleaned by?Who可不可以换成whom?为什么?
答
可以用whom，因为这个句子中的who 是by的宾语。
答
By whom the room was cleaned?
答
可以.你可以换一下句子结构the room was cleaned by whom(宾语)作宾语可以用whom
但是我觉得是不是用who cleaned the room?提问更简洁呢.但是这里就不能换成whom了,因为这里疑问代词是做主语的.
答
可以
who 可坐主语，也可坐宾语
whom 只可做宾语