___ is impossible for him to pass the English exam,for he never reads English.为什么填 It
问题描述：
___ is impossible for him to pass the English exam,for he never reads English.为什么填 It
答
这里It是形式主语. 固定句型,要记忆的.你先这样理解吧.更深层次的理解是,这里It替代的是to pass the English exam,for he never reads English动词不定式短语.这是为了避免头重脚轻的形式.所以你再看看如果除去It,那...