通常意义的形式宾语主要见于真正宾语为不定式、动名词、从句等且其后跟有宾语补足语时的情形，即用于“动词+it+宾语补足语+真正的宾语”这样的结构。
1、动词+ it + that-从句能用于此结构的动词不多，常见的有 have, take, put, like 等。
Rumor has it that the defence minister will soon resign. 据传闻，国防部长不久就要辞职。
2、动词 + it + when (if)-从句能用于此结构的动词不多，常见的有 enjoy, hate, love, like, dislike, appreciate, prefer 等。
We really appreciate it when she offered to help. 她来帮忙了，我们十分感激。
3、动词 + prep + it + that-从句能用于此结构的动词不多，常见的有see to, look to, insist on, stick to, depend on, answer for 等。
See to it that you’re not late again. 注意千万不要再迟到。
4、动词 + it + 介词短语+ that-从句能用于此结构的动词不多，常见的有take it for granted, bring it to sb’s attention, owe it to sb 等。
I owe it to you that I am still alive. 多亏有你我才仍然活着。
扩展资料：
It 用作形式主语
当不定式（短语）、动名词（短语）或从句在某个句子中作主语时，为保持句子结构前后平衡，避免头重脚轻，因此常用it作形式主语置于句首，而将真正的主语放在句尾。此时it只起先行引导作用，本身无词义。
It is wrong to tell a lie.(说谎是错误的。) 〔It为to tell a lie的形式主语〕
It is no use arguing about it.(争吵是没用的。) 〔It为arguing about it的形式主语〕
It 作形式主语的常见句型： It + be + 形容词 + to do sth. / doing / that ….
It is very important to learn a foreign language.(学一门外语非常重要。)
下列四种情况须用it 作形式宾语：
① 当不定式（短语）、动名词（短语）或从句在复合宾语结构中作某些动词的宾语时（如think, make, find, consider, feel, suppose等）；
e.g. They found it pleasant that they worked with us Chinese.
（他们发现与我们中国人一起工作很愉快。）
I don’t feel it difficult to understand the Special English.
（我觉得理解英语 特别节目并不难。）
He makes it a rule never to borrow money.
（他立志决不向别人借钱。）
I think it no need talking about it with them.
（我认为没必要跟他们谈。）
② 某些表示“喜、怒、哀、乐”的动词，如like, enjoy, love, hate等，往往不能直接接宾语从句；
e.g. I don’t like it that he’s so lazy.
（我不喜欢他那么懒惰。）
I hate it when my mother asks me to eat eggs.
（我讨厌母亲要我吃鸡蛋。）
③ that引导的宾语从句不能直接作介词的宾语；
e.g. You may depend on it that we shall always help you.
（尽管放心，我们会随时帮你的。）
Would you see to it that she gets home early?
（你负责保证她早到家，好吗？）
He insisted on it that he was innocent.
（他坚持说自己是无辜的。）
④ 由及物动词与介词组成的固定搭配中，宾语从句若作该动词的宾语时，须借用it。
e.g. I leave it to your own judgement whether you should do it.
（我让你自己判断这事是否该做。）
We owe it to you that there wasn’t a serious accident.
（多亏了你才没有发生严重事故。）
6指主句中常用的动词：think,believe,make,find,consider,feel；
1指的是形式宾语it；
2指的是宾补的两种形式：形容词或名词；
3指的是真正宾语的三种形式：不定式短语，动名词短语或that引导的宾语从句。
We think it our duty to clean our classroom every day.
He felt it important learning English well.
They found it difficult that they would finish their work in two days.