宾语从句什么情况下前面要加形式宾语IT``在线等

例示的两个宾语从句其实是两种类型的：

一类是间接宾语用宾语从句代替，另一类是直接宾语用宾语从句代替（句2）

第一句没有问题，第二句因为动词的原因，即动词需要有两个宾语才能将句子的意思表达清楚，it充当那个间接宾语，从句充当直接宾语。

当句子动词是感官动词（如see\hear\smell\notice等）或使役动词（如get\have\make\let等)的时候就需要有it充当间接宾语，从句放在it之后充当直接宾语表达句子意思

明白了吗？

从句的引导词书上都可以找到的，而且都是会用的，但是在某些情况下它可以省略。

a

shy

person

dislikes

it

when

he

has

to

make

a

speech

in

public

这个句子it作形式宾语。但就给出的句子不能确定真正的宾语是什么。

其实it作形式宾语的从句很简答关键是知道it指代的是哪个词或者那个句子，理解的时候把真正的宾语换回去就行。

when的用法，个人认为是引导了一个时间状语从句。

这个宾语从句的从句部分是一个主语从句的形式就需要

i think it wrong to do that

从句部分= it is wrong to do that

= to do that is wrong

这种情况需要it做形式宾语

I主语 feel谓语 it 形式宾语 a pity 宾补 that I haven’t been to the get-together真正的宾语

I feel 主句

（that）it is a pity that I haven’t been to the get-together宾语从句

it 形式主语is 系动词 a pity 表语 that I haven’t been to the get-together真正的主语

动词find,feel,consider,make,believe等后面有宾语补足语的时候,则需要用it做形式宾语而将that宾语从句后置 I think it necessary that we take plenty of hot water every day 我认为每天多喝开水是有必要的

一、 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

eg 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 is uncertain who will come

(谁要来还不确定) 〔It为who will come的形式主语〕

It 作形式主语的常见句型：

① It + be + 形容词 + to do sth / doing / that …

eg It is very important to learn a foreign language

(学一门外语非常重要)

It is useless crying over the spilt milk

(覆水难收)

It was really surprising that she married a man like that

(她嫁给那样的男士真让人惊讶)

② It + be +名词词组 + doing / that …

eg It is no good telling lies

(撒谎没好处)

It is a pity that you didn’t go to see the film yesterday

(你昨天没看成那部**真遗憾)

It is a truth that there would be no new China without the Communist Party

(没有***就没有新中国,这是毋庸质疑的)

③ It + be + 过去分词 + that …

该句型常见动词有：say, hope, think, suppose, expect, report, know, believe, decide, etc

eg It is said that they have invented a new type of computer

(据说他们发明了一种新型电脑)

It is believed that China will become one of the strongest countries in the world

(大家都相信中国将会步入世界强国之列)

It was reported that more than 170 thousand people died in the 2004 tsunami

(据报道,至少有十七万人在2004年那场海啸中丧生)

④ It + seems / appears / happens等不及物动词 + that …

eg It seems that he enjoys pop songs very much

(似乎他非常喜欢流行歌曲)

It appears that Tom might change his mind

(看来汤姆可能会改变主意)

⑤ 若句子是疑问形式,就只能用it作形式主语

eg Does it matter much that they won’t come tomorrow

(他们明天不来很重要吗)

Is it true that he will go abroad next week

(他下周出国是真的吗)

⑥ It + takes + (sb) + some time + to do sth

这是一个表示“（某人）花多少时间干某事”的句型,其中it是形式主语,代替后面的不定式（to do sth）,句型中的sb也可以省略

eg It took me some time to read the reading materials

(我花了一些时间才读完那段阅读材料)

It took him fourteen hours to go to New Zealand from Shanghai by plane

(从上海乘飞机去新西兰花了他14小时)

How long does it take you to go to Beijing from Qingdao by train

(从青岛坐火车到北京一般要花多久时间)

I am not sure, but I think it takes at least nine hours to get there

(我不能肯定,但估计至少要九个钟头才能到那儿)

二、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）；

eg 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；

eg 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；

eg 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

eg 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）

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