第二编 专题二 第2讲 名词性从句 2021届外研版英语高三一轮语法复习

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名词性从句名词性从句包括主语从句、表语从句、宾语从句、同位语从句。

其关联词有连接词that，if，whether;疑问代词who，what，which和疑问副词when，where，how,why等。

1.主语从句主语从句在句中做主语。

它可以放在主句谓语动词之前，但多数情况由it作形式主语，而把主语从句放在主句之后。

例如:Who did that is known to all.It is interesting that you should like him。

2.表语从句表语从句在句中作表语，位于主句中的系动词之后。

如：The question is who can complete the difficult task。

表语从句不能用if引导，但可用as if引导.例如：He looked as if he was going to cry．3.同位语从句同位语从句跟在名词后面，进一步说明该名词的具体内容。

引导同位语从句的名词主要有fact，news，promise，idea,truth等.连接词用that（不用which），及连接副词how,when，where，why等。

例如：His delay is due to the fact that the car went wrong halfway．The news that our team has won the match is true.She asked the reason why there was a delay．4.宾语从句1.宾语从句在句中作及物动词或介词的宾语。

语法对点讲练五名词性从句名词性从句的功能相当于名词词组，能在句中充当主语、宾语、表语、同位语、介词宾语等。

因此名词性从句又分为主语从句、宾语从句、表语从句和同位语从句。

引导词归类：类别功能引导词从属连词只起连接作用，不充当句子成分that, whether, if连接代词起连接作用，并充当主语、宾语、表语或定语who, whom, whose, which, what,whatever, whichever, whoever连接副词起连接作用，并充当从句状语when, where, how, why一、主语从句学问点讲解1．主语从句的一般结构①主语从句一般放于主句谓语动词前，构成：主语从句＋谓语动词＋其他。

2．it作形式主语的主语从句②It＋be/become(s)＋形容词/名词/过去分词＋主语从句。

It is clear that the whale is not a fish.③It seems/appears等动词＋that从句。

It happens that he can understand a little about the language.④It remains to be＋过去分词＋主语从句。

⑤It doesn't matter＋how/whether从句。

It doesn't matter whether he is wrong or not.⑥主语从句毁灭在感叹句中。

What a pity it is that you cannot stay for dinner.特殊提示⑦用来表示惊异、怀疑、惋惜、理应如此等语气时，主语从句谓语动词用(should＋) do形式。

常用句型有：It is necessary/important/natural/strange等＋that从句It is suggested/requested/proposed/desired等＋that从句对点训练完成下列小题，并指出考查上述哪个学问点(①～⑦)第一组单项填空1．(2021·北京卷)________ makes the book so extraordinary is the creative imagination of the writer.A. ThatB. WhatC. WhoD. Which答案__B__ 学问点__①__解析句意：使这本书与众不同的是作者具有制造性的想象力。

2021年高考英语一轮复习语法精讲精练名词性从句用法名词性从句包括主语从句、宾语从句、表语从句和同位语从句。

高考常从连接词的选择、语序、语气、时态等方面来考查。

名词性从句中的连接词有连词that / whether / as if，连接代词what / who/ which /whose / whatever / whoever / whomever / whichever，连接副词where /when /why / how / wherever / whenever。

第1讲引导名词性从句的连接词考点1.引导名词性从句的连接词有哪些有学生认为，引导同位语从句只能用that, 这句话对吗？先看下面几个句子。

①I have no question that he will e.②I have a question whether he will e③I have a question when he will e.我们可以看出：上面三个句子中question 后面都是同位语从句，都是说明question 的内容的。

在句①中，同位语从句的原句是陈述句，由that引导；在句②中，原句是一般疑问句，由whether引导；在句③中，同位语从句的原句是特殊疑问句，特殊疑问词也起着连接作用。

其实，所有名词性从句的连接词都有上面的三种情况。

宾语从句：I don’t know that he will e.I don’t know whether/if he will e.I don’t know when he will e.表语从句：What I don’t know is that he will e. What I don’t know is whether he will e. What I do n’t know is when he will e.主语从句That he will e is obvious.Whether he will e isn’t known yet. When he will e isn’t known yet.1.【xx浙江】It is uncertain ______ sideeffect the medicine will bring about, although about two thousand patients have taken it.2.A. that B. what C. how D.whether3.【xx全国新课标】It is by no means clear______ the president can do to end the strike.4.A. how B. which C. that D. what5.【xx山东】It doesn’t matter ______ youpay by cash or credit card in this store. 6.A. how B. whether C. whatD. why7.【xx陕西】It remains to be seen ______the newly formed mittee’s policy can be put into practice.8.A. that B. which C. whatD. whether9.【xx天津】It is obvious to the students______ they should get well prepared for their future.10. A. as B. which C.whether D. that11.【xx江西】It suddenlyoccurred to him ______ he had left his keys in the office.12. A. whether B. whereC. whichD. that考点2.引导词that的省略问题主语从句、表语从句、同位语从句中连词that不能省略。

语法复习专题（一）名词性从句一、考点聚焦1、名词性从句中连接词的运用名词性从句中的连接词有连词that / whether / as if，连接代词what / who/ w hich / whose / whatever / whoever / whomever / whichever，连接副词where / when / why / how / wherever / whenever。

（1）that的用法。

①主语从句、表语从句、同位语从句中用that但不能省略。

如：That they are good at English is known to us all.The problem is that we don’t have enough money.She expressed the hope that they would come to China one day.②宾语从句中的连接词that有时可省有时又不可省，在以下几种情况中that不能省略：（A）当that从句和主句谓语动词之间有插入词语或者从句主语之间有插入语时，that不可省略；（B）当that 从句与另一名词性从句并列作宾语时，that不能省；（C）当that作介词宾语时，that不可省掉。

如：He judged that,because he was a child, he did not understand wineEveryone knew what happened and that she was worried.The reason lies in that she works harder than the others do.③that从句作主语和宾语时，可以用it 来替换成以下几种结构表达。

(A)It is clear/certain/likely/true/surprising that… （B）It is a pity/shame/good idea/no wonder that ...（C）I t is said/reported/ believed/known/thought/suggested that … （D）It seems/happens that。