Who/ Whom does he like to play with Who and whom有什么区别？口语中常用WHO 代替WHOM，但如果是放在动词或介词后只能用WHOM，作主语时只能用WHO，这里是作介词宾语，可用WHO 代替WHOM，但如果是 With whom does he like to play? (这种情况只能用WHOM）