问题描述： You must reply to that boy who wrote you a letter 谁是主语能不能用whom 1个回答 分类：英语 2014-09-18 问题解答： 我来补答 you是主语.You must reply to that boy who wrote you a letter who wrote you a letter 分句里who 作主语,不可以换.You must reply to that boy who/whom you wrote a letter.这句可以,分句中作宾语 展开全文阅读
