it作形式宾语，代表其后所说的真正的宾语。真正的宾语是以that 引导的名词性从句或不定式短语。例如：

I consider it wrong that you Chinese students learn English without comparing it with your own language.考研资料下载

我认为你们中国学生学习英语，不和你们自己的语言比较是不对的。

I find it not so difficult to learn a foreign language.

我发现学习一门外语不那么困难。

I remember I made it clear to you that I was not coming.

我记得向你明确表示过我不来。

They want to make it clear to the public that they are doing an important and necessary job.

他们要向公众表明，他们在做一件重要而又必要的工作。