I hear him sing the English song.改成被动句Emmashao个个对的，但为什么是这样？
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？
答
He is heard singing the English song.
答
He is heard to sing the English song by me.
答
He is heard sung the English song
答
He is heard sing the English song by me.
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.
答
The English song he sang was heard by me