I find it necessary to tell him about it.

题目

I find it necessary to tell him about it.
把 it necessary to tell 换成 that necessary to tell

答案

不能,因为sb.find it +adj.+to……是固定搭配.这里的it 是形式主语,英语中避免主语太长而用it来代替长主语,后面其实是真正的主语（it is necessary to tell him about it）