It 用作形式宾语
当不定式（短语）、动名词（短语）或从句在某个句子中作宾语时，为保持句子结构平衡，避免句式结构的混乱，常用it作形式宾语，而将真正的宾语放在句尾。此时it仍只起先行引导作用，本身无词义。
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 judgment 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。）
“it”作形式宾语时的几种特殊结构
英语中，当动词不定式、动名词或从句在句中充当宾语且其后又带有宾语补足语时，习惯上要在宾语补足语前使用一个没有具体意义的形式宾语it，而将真正的宾语移到补足语的后面，构成“动词＋it＋宾语补足语＋不定式（动名词或从句）”结构。如：She felt it her duty to take good care of them.
她感到好好照顾他们是她的责任。
I think it no good going there now.
我认为现在去那里没有好处。
The headmaster has made it clear that the school meeting will not be put off.
校长说得很清楚校会不会推迟。
但我们常会碰到it用作形式宾语时之后没有形容词或名词作宾语补足语的情况，这一点在近几年高考试题中经常涉及，需引起同学们的注意。
I hate_____ when people talk with their mouths full.
A. it B. that C. these D. them
我讨厌人们一边吃饭一边说话。
I like _____ in the autumn when the weather is clear and bright.
A. this B. that C. it D. one
我喜欢秋天晴朗的天气。
以上这两道高考题中，it用作形式宾语，它的真正的宾语则是由when引导的从句。“it”的这种特殊用法常出现在以下几种结构中。
A. 动词＋it＋when / if 从句。常见于appreciate, enjoy, like, dislike, love, hate, prefer等少数动词之后。
We would much appreciate it if you could do us that favour.
要是你们能帮我们这个忙，我们将非常感激。
I'd prefer it if I didn't have to finish the work.
要是我不必完成那项工作，那就太好了。
B. 动词+ it + that从句。常见于like, take, have, put等少数动词之后（it相当于that从句的同位语）。
I take it that they will succeed sooner or later.
我认为他们迟早会成功的。
The newspapers have it that some Japanese firms have gone bankrupt.
报上说一些日本商号破产了。
it作形式宾语的5种类型是哪5种？例句？
It 用作形式宾语 当不定式（短语）、动名词（短语）或从句在某个句子中作宾语时，为保持句子结构平衡，避免句式结构的混乱，常用it作形式宾语，而将真正的宾语放在句尾。
此时it仍只起先行引导作用，本身无词义。
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 judgment 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。
）“it”作形式宾语时的几种特殊结构英语中，当动词不定式、动名词或从句在句中充当宾语且其后又带有宾语补足语时，习惯上要在宾语补足语前使用一个没有具体意义的形式宾语it，而将真正的宾语移到补足语的后面，构成“动词+it+宾语补足语+不定式（动名词或从句）”结构。
如：She felt it her duty to take good care of them. 她感到好好照顾他们是她的责任。
I think it no good going there now.我认为现在去那里没有好处。
The headmaster has made it clear that the school meeting will not be put off.校长说得很清楚校会不会推迟。
但我们常会碰到it用作形式宾语时之后没有形容词或名词作宾语补足语的情况，这一点在近几年高考试题中经常涉及，需引起同学们的注意。
I hate_____ when people talk with their mouths full. A. it B. that C. these D. them （答案为： A） 我讨厌人们一边吃饭一边说话。
I like _____ in the autumn when the weather is clear and bright. （全国卷 2004） A. this B. that C. it D. one （答案为： C）我喜欢秋天晴朗的天气。
以上这两道高考题中，it用作形式宾语，它的真正的宾语则是由when引导的从句。
“it”的这种特殊用法常出现在以下几种结构中。
A. 动词+it+when / if 从句。
常见于appreciate, enjoy, like, dislike, love, hate, prefer等少数动词之后。
We would much appreciate it if you could do us that favour.要是你们能帮我们这个忙，我们将非常感激。
I'd prefer it if I didn't have to finish the work.要是我不必完成那项工作，那就太好了。
B. 动词+ it + that从句。
常见于like, take, have, put等少数动词之后（it相当于that从句的同位语）。
I take it that they will succeed sooner or later.我认为他们迟早会成功的。
The newspapers have it that some Japanese firms have gone bankrupt.报上说一些日本商号破产了。
形式宾语的句型结构是什么？
顺手采纳答案it作形式宾语的句型通常和下列动词连用： consider, think, make, find, believe, count, declare, deem, fancy, feel, guess, imagine, judge, prove, see, show, suppose, understand, take等。
例如： ● We consider it our duty to support good leaders. ● I think it best to get along well with others. ● The new method makes it possible to complete the task faster. ● Tom found it very embarrassing to be reminded of the long-standing debt. ● Susan deemed it advisable to keep the matter secret. ● We all feel it nice to be able to visit that distinguished university. ● Who can prove it wrong to have a ＂make-money-quick＂ mentality?...
用宾格形式的英语单词造个句子每句不少于五个单词
it作形式主语或宾语时没有具体的意义，而只是帮助把真正的主语或宾语移到句子后部去，使句子显得平稳一些，不至于头重脚轻。
不能直接加从句需要形式宾语的动词或短语、甚至句式太多。
无法在此给你列举，建议去网上搜：it作形式主语和形式宾语。
给你个参考：讲下面的地址复制到网页的地址栏内，回车后就能看到。
http://wenku.baidu.com/link?url=NSHteGhuLCxCqnbt2Jln4AQKVV5zlFUj34rYk6Nt9BMCMyG2-cgQPVYhkf6xTJW54JkysO3AjrcohvXm5CQRmc53MCm4J8II25mEydNBxVC
宾语+陈述句造句两句
（一）that引导的宾语从句（在非正式场合that可以省略）例句：I don't think it is right for him to treat you like that.在以下情况中that不能省略当句中的动词后接多于两个由that引导的宾语从句时，第一个that可省，但后面的that不可省.例句：He said you were too young to understand the matter and that he was asked not to tell you.当主句的谓语动词与that宾语从句之间有插入语时，that一般不可省.例句：Just then I noticed, for the first time, that our master was wearing his fine green coat and his black silk cap.当that从句是双宾语中的直接宾语时，that不可省.例句：I can't tell him that his mother died.注意事项：许多带复合宾语的句子，that引导的宾语从句经常移到句子后部，而用it作形式宾语.例句：I find it necessary that we should do the homework on time.（二）由whether,if 引导的宾语从句由whether引导的宾语从句，实际上是一般疑问句演变而来的.意思是“是否”.宾语从句要用陈述句语序.一般说来，在宾语从句中whether与if可以互换使用，但在特殊情况下if与whether是不能互换的.例句：I wonder whether they will come to our party.只能用whether，不能用if引导的宾语从句在带to的不定式前例句：We decided whether to walk there.在介词的后面例句：I'm thinking of whether we should go to see the film.在动词后面的宾语从句时例句：We discussed whether we had a sports meeting next week直接与or not连用时例句：I can't say whether or not thet can come on time.只能用if不能用whether引导的宾语从句if引导条件状语从句，意为“如果”例句：The students will go on a picnic if it is sunny.if引导否定概念的宾语从句时例句：He asked if I didn't come to school yesterday.引导状语从句even if（即使）和as if（好象）时例句：He talks as if he has known all about it.
形式宾语讲解！非常感谢！
在英语中，为了平衡句子结构或避免句子结构的混乱，常用it作形式宾语，而将真正的宾语后置。
一、当谓语动词为think, make, find, consider, feel, hear等，后接复合宾语[宾语+宾语补足语]时， 常用“主语+谓语动词（think等）+it+宾语补足语+不定式结构/V-ing分词/that从句”。
如： We think it our duty to study and work hard for our great motherland. 我们认为为祖国努力学习和工作是我们的职责。
二、某些表示“喜怒哀乐”的动词如like, enjoy, love, dislike, hate, appreciate等，往往不直接接从句，特别是that引导的宾语从句。
若接宾语从句，从句前须跟一个形式宾语it。
如： I hate it when people speak with their mouths full of food. 我讨厌人们满口食物讲话。
由于that从句一般不能直作做介词的宾语， 所以介词后若接that引导的宾语从句，则须先接一个形式宾语it而后才接真正的宾语。
如： Before we leave, we must see to it that everything is ready. 在离开前，我们必须确保一切都准备好。
You may depend on it that I shall help you. 你可以依靠我来帮你。
三、“动词+介词”所构成的固定词组如果跟宾语从句必须先跟it 形式宾语，it须置于动词和介词之间，此类词组常见的有：leave it to（由„„决定/判断），owe it to somebody（归功于/多亏），take it for granted（想当然/认为„„是真的），have/bear/keep it in mind（记住）。
如： I will leave it to your own judgment whether you should do it. 我将由你判断是否应做那件事。
We owed it to you that there was not a serious accident. 我们多亏了你才没有出严重的事故。
We must have/bear/keep it in mind that nothing is too difficult if we put our heart into it. 我们必须记住：世上无难事，只怕有心人。
为保持句子平衡,用it来代替动词不定式,在句子中作形式主语或形式...
1. 形式主语为了保持句子平衡，通常将主语从句移至句末而在原主语位置使用形式主语it。
具体说来，有以下两种情况：对于以that引导的主语从句，通常用形式主语代主语从句；对于以连接代词（副词）引导的主语从句，可以使用形式主语代主语从句，也可直接在句首使用主语从句。
如：It's a shame he didn't come. 很遗憾他没来。
Whether it will do us harm remains to be seen.= It remains to be seen whether it will do us harm. 是否对我们有害还要看一看。
Where I spend my summer is no business of yours.= It is no business of yours where I spend my summer. 我在哪里过暑假不关你的事。
2. 形式宾语当宾语从句后跟有宾语补足语时，通常在宾语从句处使用形式宾语 it，而将真正的宾语从句移至句末。
如：He didn't make it clear why he had left so early. 他没有讲清他为什么那么早离开。
He doesn't want it to be known that he's going away. 他不想让人知道他要离开。
当主语、宾语是很长的从句、不定式、动名词时常用“形式主语”和“形式宾语”来替代，而真正的主语、宾语置于句末。
1.用“形式主语”的情况下，说明真正的主语（从句、不定式、动名词）较长， 用“形式主语”是比较符合英语习惯的。
是避免句子头重脚轻的一种句型。
如： That he won the game is true. 换成 It is true that he won the game .真主语是that 后的he won the game整个句子。
2.在用“形式宾语”的情况下，I find that getting along with her is hard 。
换成 I find it hard to get along with her. 这里 不定式to get along with her 是真正的宾语。
it 是形式宾语。