带复合宾语的动词变被动时为什么不用加by

问题描述

精选答案

不是不用加by ,而是by 短语可省略（不是强调动作的执行者时）。

如 1. They heard her sing an English song at the party. 他们在晚会上听到她唱了一首英语歌。被动语态是：:She was heard to sing an English song (by them ) at the party. （by them 可省略。） 2.Jim often see him play basketball on the playground. 吉姆经常看见他在操场上打篮球。被动语态是： He is often seen to play basketball by Jim on the playground .(by JIm 不可省略） 拓展： 含复合宾语的动词变成被动语态时,将宾语变为主语,宾语补足语变为主语补足语,但若谓语动词为listen to,feel,hear,see,look at,notice,make等而宾补不带to的不定式时,变被动应加上to.