问题描述：
The policeman wouldn't have believed me if you hadn't back me up
wouldn't have believed me 不要只翻译,还要语法解释,因为我这个语法点不明,
wouldn't have believed me 不要只翻译,还要语法解释,因为我这个语法点不明,
问题解答：
我来补答展开全文阅读