为什么这里不要还原to?I heard the boy singing just now.The boy was heard singing just now.

分类: 作业答案 • 2022-06-08 09:34:35

问题描述：

答

I heard the boy singing just now. The boy was heard to sing just now.

答

hear +宾语 + 宾补[ do/doing/v+ed ]
hear +宾语 +do 宾补此结构中是省略了to的不定式.当变成被动时才要还原to