问题描述: I hear him sing the English song.改成被动句Emmashao个个对的,但为什么是这样? 1个回答 分类:英语 2014-10-09 问题解答: 我来补答 He is heard to sing the English song.因为在主动语态中,感官动词hear要省to,但在被动语态中,感官动词hear不能省to. 展开全文阅读