问题描述: I heared him sing that song yesterday.中sing为什么不改变形式? 1个回答 分类:英语 2014-12-03 问题解答: 我来补答 hear sb do sth固定搭配,听见某人做某事如果是听见某人正在做某事就是hear sb doing sth 展开全文阅读