高考英语语法核心考点专项复习名词性从句知识点整理总结从句是学生们很头疼的一个难题，也是高考的必考点。

其中包括名词性从句、定语从句、状语从句，名词性从句考察比较多。

名词性从句内容多、考点多。

本专题主要讲解主语从句、表语从句、宾语从句以及同位语从句，并配以习题练习。

概述：名词性从句的功能相当于名词。

根据其在句中充当的成分，可分为：主语从句、宾语从句、表语从句和同位语从句。

目的：掌握从句的连接词和用法，能够识别出从句，学会分析从句的结构。

例句：What he wants to tell us is not clear.The question is whether we can get in touch with her.It was my father who did the experiment in the lab yesterday evening.She always thinks of how she can work well.That is why he didn't come to the meeting.I have no idea when he will come back home.一、主语从句在复合句中做主语的从句叫主语从句。

引导主语从句的连词：that（无意义，所引导的主语从句是完整的），whether （是否），if （是否）（通常只能用于it作形式主语的主语从句），连结代词： who （谁）（主格）, whom （谁）（宾格）, whose（谁的）（所有格）, what （什么，所……的（东西或事情））, which （那个，那些），whoever （无论谁）（主格）, whomever （无论谁）（宾格）, whatever（无论什么）, whichever （无论那个，无论那些），连接副词： when（何时）, where （何地）, how （怎样，如何）, why （为什么）等。

如：That the 2022 Winter Olympic Games will be held in Chengde is known to us all.=It is known to us all that the 2022 Winter Olympic Games will be held in Chengde.=What is known to us all is that the 2022 Winter Olympic Games will be held in Chengde.=As is known to us all, the 2022 Winter Olympic Games will be held in Chengde.众所周知，２０22年冬季奥运会将在承德举行。

That you don’t like him is none of my business.你不喜欢他与我有什么关系呢。

What he said at the meeting astonished everybody present.他在会上的发言是到会的人都感到惊讶。

What are to be decided at the meeting will be announced tomorrow.在会议上即将做出的决定明天就会公布。

What is known to us all is that China is a developing country.= that China is a developing country is known to us all.＝It is known to us all that China is a developing country.=As is known to us all, China is a developing country.众所周知，中国是一个发展中国家。

注：由于主语从句一般都较长，所以常用it作形式主语，而把主语从句置于句末。

如：It worried her a bit that her hair was turning gray.=Her hair was turning gray, which worried her a bit.=Her hair was turning gray, and it worried her a bit.=Her hair was turning gray. It worried her a bit.头发日渐灰白使他有些担忧。

It is a fact that Chinese is being accepted as an international language.汉语正逐渐被人们承认为一门国际语言是一个事实。

It happened that she married a man whose father had killed her father.碰巧她嫁给了一个他的父亲杀害她的父亲的男人。

二、宾语从句在句中做宾语的从句叫宾语从句。

宾语从句可以作谓语动词、介词、非谓语动词和一些形容词的宾语。

引导宾语从句的连词：that（无意义，所引导的主语从句是完整的），whether （是否）， if （是否）（通常只能用于宾语从句，但不能与or not连用）, 连结代词： who （谁）（主格）, whom （谁）（宾格）, whose （谁的）（所有格）, what （什么，所……的（东西或事情））, which （那个，那些），whoever （无论谁）（主格）, whomever （无论谁）（宾格）, whatever（无论什么）, whichever （无论那个，无论那些），连接副词： when（何时）, where （何地）, how （怎样，如何）, why （为什么）等。

如：I remember when this used to be a quiet village.我还记得这村庄以前那宁静的时光No one can be sure what man will look like in a million years.没有人确知人类在一百万年后会是什么样子。

I really don’t know how he solved the problem.我真地不知道她是怎样解决这个问题的。

注： a. 用that引导的宾语从句，that通常可以省略，如果有两个及以上的that引导的宾语从句，最后一个that 不能省略。

如：He denied (that) he had entered the room and that he had stolen the money.他否认了他曾进入房间偷钱。

b. 注意宾语从句中“否定前移”的现象。

如果主句中有表示“认为”之意的动词：think, suppose, believe, expect, imagine等，则宾语从句中的否定应在主句中表达出来。

如：I don’t suppose she is likely to come.我认为她不可能来。

I don’t th ink he can pass the exam.我认为他不可能通过考试。

c. 在疑问句中，表示“认为”之意的动词：think, suppose, believe, expect,imagine等后接带疑问词类的连接词的宾语从句时，该疑问词类的连接词应该置于句首。

如：Who do you suppose will go to Beijing?你认为谁会去北京？Where do you think we will have the meeting?你认为我们在那儿开会？-- We haven’t heard from her for a long time.-- What do you think has happened to her?－我们很久没有收到她的来信了。

－你认为她出了什么事吗？d. 如果宾语从句从句后带有宾语补足语，则用it作形式宾语，而把宾语从句置于宾语补足语之后。

如：We all consider it a pity that he was not able to join us in going camping.我们都认为他不能跟我们一起去野营是一件遗憾的事。

I think it very necessary that primary school pupils should learn English.我认为小学生学英语是非常必要的。

e. 注意介宾从句的使用。

如：The dictionary is good except that the price is too high.这本词典不错，只是价格太高了。

Nobody showed any interest in what he was saying.没有人对他所说的感兴趣。

f. 注意宾语从句的省略形式。

在上下文已经表达了宾语从句的内容的情况下，宾语从句通常只保留连接词，而省略句子的其余内容。

如：Dr. Black comes from either Oxford or Cambridge, I can’t remember which.布莱克博士不是来自牛津就是来自剑桥，我记不起从哪里来的了。

三、表语从句在复合句中做主句表语的从句叫表语从句.引导表语从句的连词： that（无意义，所引导的主语从句是完整的），whether （是否），连结代词： who （谁）（主格）, whom （谁）（宾格）, whose （谁的）（所有格）, what （什么，所……的（东西或事情））, which （那个，那些），whoever （无论谁）（主格）, whomever （无论谁）（宾格）, whatever （无论什么）, whichever （无论那个，无论那些），连接副词： when（何时）, where （何地）, how （怎样，如何）, why （为什么）, as if/though（好像）, because（因为，由于）等。

The problem is that we are short of tools.问题是我们缺少工具。

What interests me most is what I have bought myself.使我非常感兴趣的是我自己买的东西。

Go and get your coat. It’s where you left it.去把你的上衣拿回来，它还在你放的地方。

That is why there appears a rainbow in the sky.那就是为什么天空中会出现彩虹。