问题描述：
I couldn't remember后从句应用什么时态?
还有,You must give the wallet back to whom it belongs to..此句为何语法正确?whom前面不是应该加被其修饰的名词（the person）吗?
还有,You must give the wallet back to whom it belongs to..此句为何语法正确?whom前面不是应该加被其修饰的名词（the person）吗?
问题解答：
我来补答展开全文阅读