we saw him come 变为被动语态 （ ）was ( ) ( ) come 要按这种形式改

题目

we saw him come 变为被动语态 （ ）was ( ) ( ) come 要按这种形式改

答案

He was seen to come.
（一些单词后面是do的,比如hear sb.do sth.改为被动语态就要变成be done的形式后加to do）