名词性从句的六大误区
高中英语知识点归纳名词性从句的常见错误
高中英语知识点归纳名词性从句的常见错误高中英语知识点归纳：名词性从句的常见错误名词性从句是英语语法中的重要部分，在高中英语学习中占据着重要的地位。
然而，由于名词性从句的结构较为复杂，学生在运用时常会出现一些常见的错误。
本文将对名词性从句的常见错误进行归纳总结，希望对同学们的英语学习有所帮助。
一、缺少主语缺少主语是名词性从句常见的错误之一。
在名词性从句中，从句本身需要担当一个句子的成分，并且代替主语的角色。
例如:错误：What happened next surprised everyone in the room.正确：What happened next surprised everyone in the room.二、缺少谓语动词除了缺少主语，名词性从句还常常出现缺少谓语动词的错误。
在名词性从句中，从句需要担当一个完整的句子，并且代替主语、宾语等角色。
例如:错误：I don't know which book you are talking about.正确：I don't know which book you are talking about.三、主谓不一致名词性从句的主谓一致也是容易出错的地方。
当从句作为主语出现时，需要与谓语动词保持一致，即使用单数或复数形式。
例如:错误：What interests me are the beautiful flowers in the garden.正确：What interests me is the beautiful flower in the garden.四、代词不一致在名词性从句中，代词的使用也经常引发错误。
当名词性从句中的代词与先行词不一致时，容易造成语义混淆。
例如:错误：My sister told me that she wants to study abroad.正确：My sister told me that she wants to study abroad.五、时态错误时态错误也是名词性从句中常见的错误之一。
名词性从句常见错误例析
arrive名词三.whatever/whoever 的功用：名词性从句常见错误例析1.【误】 He will come back surprises all of us.【正】 That he will come back surprises all of us.【析】 that引导名词性从句时,尽管无意义也不充当成分,但除了在动词后引导单个宾语从句时可省略外,其它情况不能省略。
2.【误】 That he really means is what he doesn’t agree with us.【正】 What he really means is that he doesn’t agree with us.【析】 that和what均可引导名词性从句，区别在于：what在名词性从句中作主语、宾语或表语，而that在名词性从句中不作任何成分，只起连接作用。
误句的主语从句应该用what作means的宾语，表语从句中应该用that，that在从句中不作任何成分。
3.【误】 The news which our team had won pleased everyone.【正】 The news that our team had won pleased everyone.【析】 which在此句中不充当成分，说明从句不是定语从句而是同位语从句。
同位语从句不能用which引导，故改为that。
4.【误】 The reason why he failed in the exam was because he was too careless.【正】 The reason why he failed in the exam was that he was too careless.【析】主语为reason时，引导表语从句的关联词一般用that，不用because，构成The reason why/for which/that/for . . . is that . . . 句型。
名词性从句常见错误分析与对策
名词性从句常见错误分析与对策名词性从句是英语语法中一种重要的句型结构，用于作为句子的主语、宾语或表语等。
然而，由于其复杂性和易于混淆的特点，常常容易出现错误的情况。
本文将对名词性从句常见的错误进行分析，并提出相应的对策。
一、缺乏主谓一致名词性从句作为句子的主语或宾语时，经常容易导致主谓不一致的错误。
一般情况下，名词性从句的主语和谓语动词应该保持一致。
例如：The fact that she have a good memory are well known.→ The fact that she has a good memory is well known.对策：在使用名词性从句时，要注意主谓一致的原则，特别是当从句的主语是单数时，谓语动词应该使用单数形式。
二、使用错误的连接词名词性从句需要通过连接词引导，然而很多学习者在使用连接词时经常混淆不同的从句类型，导致语法错误。
例如：I wonder that if he will come to the party.→ I wonder if he will come to the party.对策：在使用名词性从句的连接词时，要注意区分不同的从句类型。
例如，当表示疑问或选择时，应该使用if或whether引导名词性从句。
当表示否定时，应该使用that或whether。
三、语序错误名词性从句在句子中的位置不同，语序也会发生变化。
有时学习者会忽略语序的正确性，导致语法错误。
例如：I don't know why did he leave the company.→ I don't know why he left the company.对策：在名词性从句中，要注意将疑问词移到句首，谓语动词放在主语之后。
四、冗余和繁琐的表达有时候，为了强调或者表达复杂的意思，学习者会在名词性从句中使用过多的修饰语，导致冗长和繁琐的表达。
例如：The fact that he has been working hard day and night despite his difficult circumstances is a testament to his dedication.→ His dedication is demonstrated by his hard work despite his difficult circumstances.对策：在使用名词性从句时，要尽量简洁明了地表达意思，避免冗余和繁琐的修饰语。
常见错误名词性从句使用不当
常见错误名词性从句使用不当名词性从句是英语语法中非常常见的一种句子结构，它可以充当名词的功能，用来表示事物的具体内容、特征、性质等。
然而，由于语法规则和使用频率的差异，常有一些错误的名词性从句使用方式，今天我们就来讨论一下这些常见错误及如何避免它们。
一、误用名词性从句作同位语名词性从句可以用来作主语、宾语和表语等，但不能用作同位语。
有时，我们会误将同位语和名词性从句混淆使用，而造成语法错误。
例如：错误：我相信他会实现他说的，这个“我相信他会实现他说的”是一个名词性从句，用错了。
正确: 我相信他会实现他所说的。
二、用错引导词名词性从句的引导词有很多，如that、whether、if、who、which等等，但是这些引导词的使用是有区别的，需要根据具体情况做出正确选择。
1. 误用whether和if有时候，我们会在宾语从句中误用whether和if，因为它们都可以表示“是否”，但实际上它们的用法是有区别的。
whether用于是否引导宾语从句，if用于是否引导特殊疑问词加动词来引导宾语从句。
例：错误: 我不知道他是否会来。
正确: 我不知道他会不会来。
2. 引导词that的省略在名词性从句中，引导词that通常是不可省略的，除非这个从句已经有明确的主语或宾语，否则就不能省略。
例：错误：我希望能看到他。
正确：我希望能看到他。
三、错误使用连接词连接词在名词性从句中起到连接主句和从句的作用，使用不当会导致句子结构混乱。
下面是几个常见的错误使用连接词的例子：1. 使用错误的连接词错误: 我不知道哪儿他去了，你能告诉我吗？正确: 我不知道他去哪儿了，你能告诉我吗？2. 连接词放置错误位置错误: 他已经告诉我他怎么去，去那儿你知道吗？正确: 他已经告诉我怎么去，你知道去哪儿吗？四、使用错误的时态名词性从句的时态要与主句保持一致，有时我们容易在时态上出错。
例如：错误：我觉得他曾经参加过英语比赛。
正确：我觉得他曾经参加过英语比赛。
名词性从句常见错误
I. 错误例析：1. 误：The question is when will he come back.正：The question is when he will come back.析：从句语序颠倒。
在所有名词性从句中，从句必须用陈述句语序。
2. 误：It is unknown that when we will have the meeting.正：It is unknown when we will have the meeting.析：从句已由when引导，引导词that多余。
3. 误：We won the match surprised us all.正：That we won the match surprised us all.析：从句中缺少引导词。
在名词性从句中，连词that不作句子成分。
在主语从句、表语从句和同位语从句中，that一般不省略。
在宾语从句中，可以省略，但如果动词后面有两个宾语从句时，第二个that不可省略。
4. 误：Whether she will come matter a great deal.正：Whether she will come matters a great deal.析：从句中主谓不一致。
从句作主语，与动名词、不定式作主语一样，谓语用单数形式。
5. 误：That he discovered is that I want to know.正：What he discovered is what I want to know.析：引导词的误用。
that 和what二者都可引导名词性从句，但that 不充当句子成分，而what充当句子成分。
此句中what分别在主语从句和表语从句中充当宾语。
6. 误：That he will come depends on the weather.正：Whether he will come depends on the weather.析：误解句意，从而误用引导词that和whether。
名词性从句使用八忌
名词性从句使用八忌罗玉南名词性从句是中学英语语法的重点和难点，现把在使用名词性从句过程中应注意的几个方面总结以下，供同学们学习参考。
一忌 that与what混淆what引导的名词性从句意为“……的东西（事情）”或“什么”，相当于all that。
如：【误】That he needs to get rid of smoking is your help．【正】What he needs to get rid of smoking is your help．【正】All (that) he needs to get rid of smoking is your help.that引导定语从句。
二忌多that引导名词性从句的连接代词who, whose, which, what, 连接副词how, why, where, when和连词if，whether等前，不可再用that。
如：【误】I wonder that when they got to know each other．【正】I wonder when they got to know each other．三忌少that引导名词性从句的that在句中无具体意思，但在下列情况下，that不可省略：1．宾语从句被分隔或提前时；2．宾语从句不止一个时；3．引导主语从句、表语从句或同位语从句时。
如：【误】We don’t doubt, in any case, he keeps his word．【正】We don’t doubt, in any case, that he keeps his word．（插入语in any case将宾语从句与谓语动词分隔开，故不可省略that。
）【误】Everyone could see what was happening and poor Mary was nearly frightened．【正】Everyone could see what was happening and that poor Mary was nearly frightened．（what was happening和that poor Mary was nearly frightened为并列的宾语从句，故不可将that 省略。
中考易错题系列名词性从句的常见错误及解析
中考易错题系列名词性从句的常见错误及解析中考易错题系列：名词性从句的常见错误及解析名词性从句在中考英语考试中是一个重要的考点，但也是容易出错的地方。
本文将针对名词性从句常见的错误进行解析，帮助同学们避免这些错误，提高考试得分。
一、错误类型：主谓一致错误名词性从句作为主语时，需要与谓语动词保持一致。
然而，很多学生在这方面容易犯错。
例如：1. 错误示范：What you said it's not true.正确示范：What you said is not true.解析：名词性从句"What you said"作为主语，谓语动词应该使用单数形式"is"。
2. 错误示范：Where we will go depends on whether it rains.正确示范：Where we will go depends on whether it rains or not.解析：名词性从句"whether it rains"作为主语，谓语动词缺少否定形式"or not"。
二、错误类型：主语与谓语不一致名词性从句作为主语时，要注意主语与谓语在单复数形式上的搭配。
例如：1. 错误示范：The thing that bothers me is she doesn't like sports.正确示范：The thing that bothers me is that she doesn't like sports.解析：名词性从句"that she doesn't like sports"作为主语，谓语动词应该使用单数形式"bothers"。
2. 错误示范：One of the things that make me happy are my friends.正确示范：One of the things that makes me happy is my friends.解析：名词性从句"that makes me happy"作为主语，谓语动词应该使用单数形式"makes"。
名词性从句误区辨析
名词性从句误区辨析作者：周兴旺来源：《高中生学习·高二文综版》2013年第04期名词性从句是高中英语的一个重要语法内容。
在学习和使用的过程中，因为认识不足和语言惯性，同学们往往会陷入误区。
误区一混淆what与thatthat在引导名词性从句时本身没有意义，也不在句子中充当成分，但that引导的同位语从句、表语从句和主语从句放在句首时，that不能省略；that引导的宾语从句不能用在介词后作宾语。
what意为“……的东西或事情”，在从句中可以充当主语、宾语或表语。
如：I can well remember that there was a time when a deep blue sky， the song of the birds，moonlight and flowers could never have kept me spellbound. that在该句中引导宾语从句，不作任何成分，可以省略。
I lived in what you call “Ancient Greece” and I used to write about the Olympic Games a long time ago. what在该句中引导宾语从句，并在从句中作宾语。
That a new teacher will come to teach us geography is true. that在该句中引导主语从句，不作任何成分，不能省略。
After that， what happened to the Amber Room remains a mystery. what在该句中引导主语从句，并在从句中作主语。
There is no doubt that the boxes were then put on a train for Kongsberg， which was at that time a German city on the Baltic Sea. that在该句中引导同位语从句，在从句中不作任何成分，不能省略。
名词性从句中的易错点
名词性从句中的易错点（一）that引导的定语从句与同位语从句定语从句与前面的的名词是修饰与被修饰的关系，“……的名词”，而同位语从句是用来说明前面名词的内容。
与that从句同位的名词必须是一些表示事实或概念的抽象名词，如fact,news,belief,truth,reply等。
That 在定语从句中必须作成分，可用which或who/whom代替，而that在同位语从句中不充当任何句子成分，只起连接作用。
如：①Along with the letter was his promise that he w ould visit me this coming Christmas. ②Do you still remember the chicken farm that we visited three months ago. 解析：在句①中，that引导同位语从句解释说明promise的内容，that不充当任何句子成分，只起连接作用，而在句②中，that在其引导的定语从句中作动词visited的宾语，对先行词the chicken farm起修饰作用。
感悟：学生之所以在这一点上容易出错，主要还是因为对定语从句的理解不够深刻，分辨不出that在从句中是否充当了句子成分，因此，还需在句子分析上下功夫，并且搞清何谓同位语从句。
（二）名词性从句中，关于it作形式主语和形式宾语的易错点 1) 名词性从句作主语或宾语时，为保持句子平衡，常用it作形式主语或形式宾语。
如：It’s a pity that he don’t come to give a speech.（形式主语） We think it possible that you can finish the job today.（形式宾语） 2）谓语动词 appreciate, dislike, hate, like, love, make等接由if或when 引导的宾语从句时往往在从句前加上形式宾语it. 例如：I would appreciate it if you could come to my birthday party. 3）动词hare, take, hide, punish, put等,后接由that 引导的病因从句式，往往在从句前加形式宾语it. 例如：① I take it that you will be leaving Shanghai so on. ② we punished it that we had finished the project ahead of time. 4）短语动词answer for, count on depend on, insist on, see to 等后接有that引导的宾语从句时，必须冠以形式宾语it. 例如：① I’m counting on it that you will come. ② She’ll see to it that he goes ahead. 注：作形式主语和形式宾语时只能用it.冠词冠词分为不定冠词（a, an），定冠词（the），和零冠词。
例说名词性从句的几个易错点
名词性从句是高考必考的语法知识点。
名词性从句顾名思义是一种具有名词功能的从句，主要包括四种从句，分别是主语从句、宾语从句、表语从句、同位语从句。
下面列举了一些易错点，以期对同学们的学习和复习备考有所帮助。
易错点一：it 作形式宾语若动词believe ，feel ，make ，find ，consider ，think 等后接宾语从句时，且带有形容词或者名词作其宾语补足语时，为了使句子结构保持平衡，一般把it 放到上述动词后作为形式宾语，it 后紧跟作为宾语补足语的名词或形容词，而把宾语从句放到宾语补足语后，构成“主语+动词+it+宾补（形容词或名词）+宾语从句”结构。
例1：Jeremy thought it necessary that his parents must give him enough money every day.解析：画线部分是宾语从句，it 是形式宾语代替画线部分，necessary 是形容词做宾语从句的补足语。
易错点二：it 作形式主语为了使句子保持平衡，避免句子出现头重脚轻的情况，通常用it 作形式主语，且把it 置于句子的最前面，而把it 代替的主语从句置于句尾。
常见的it 作形式主语的句式有五种，分别是：1.It+be+名词（名词短语）+that 从句在这个句式中常见的名词或名词短语有：fact ，shame ，duty ，question ，pity ，surprise ，good news ，com-mon knowledge 等。
例2：It is a fact that children with low comprehen-sive quality will not be able to integrate into the main-stream society in the future.解析：画线部分是主语从句，it 是形式主语放到句首代替画线部分。
易错点12 名词性从句(4大陷阱)-备战2024年高考英语考试易错题(解析版)
易错点12名词性从句目录01易错陷阱（4大陷阱）02举一反三【易错点提醒一】主语从句连接词what/that/whether/if易混易错点【易错点提醒二】宾语从句引导词及介词后接宾语从句易混易错点【易错点提醒三】表语从句引导词及三个句式易混易错点【易错点提醒四】同位语从句与定语从句易混易错点03易错题通关易错陷阱1：主语从句连接词what/that/whether/if易混易错点。
【分析】1.that引导主语从句时，无词义，只起连接作用，一般不能省略。
what在从句中作主语、宾语、表语和定语。
2.whether引导的主语从句可放在句首，if引导主语从句在句尾，且用it作形式主语。
3.It作形式主语，that引导真正的主语从句。
4.What引导主语从句时，谓语动词一般用复数形式，若表语是复数，则谓语用复数。
易错陷阱2：宾语从句引导词及介词后接宾语从句易混易错点。
【分析】1.doubt用于肯定句时，宾语从句用whether，doubt用于否定句时，宾语从句用that 引导。
2.介词后跟宾语从句时只能用wh-类连接词引导；如：I’m surprised at what he said.3.介词后如果跟that从句，要先加it作形式宾语，再加that从句。
如：depend on it that...;rely on it that...;see to it that...等。
4.宾语从句的时态：主句是现在时或将来时，从句用句意的各种时态。
主句是过去时，从句用相应的过去时态。
从句表示客观事实或真理，从句都用现在时。
易错陷阱3：表语从句引导词及三个句式易混易错点。
【分析】1.as if/as though引导时，从句可用陈述语气，也可以用虚拟语气。
2.That is why+结果，表示“那就是.....的原因”。
3.That is because+原因，表示“那是因为......”。
4.The reason why/for...is that...,表示“......的原因是......”。
名词性从句常见错误
That you need is more practice.
What you need is more practice.
连接代词what 引导主语从句，并在从句中作 主语，而 that在从句中不做成分。 2、重要的是我们应当提高生产量。
It's important if we should raise the production.
8、这取决于他是否准备好了。
It depends on if he's ready. It depends on whether he's ready. 介词后面引导宾语从句时，需用 whether, 不用if。
9、你向主管销售的人负责。
You're responsible to whomever is in charge of sales.
Whoever wants to speak to me on the phone, tell them I'm busy.
whoever后面的动词应用单数形式。
11、这就是我们决定推迟讨论的原因。
That is because we decided to put the discussion off. That is why we decided to put the discussion off.
That is the reason why we decided to put the discussion off.
why可引导表语从句，也可用作关系副词，引导 定语从句，修饰先行词 the reason。
12、昨天下大雨，使我们来不了。
It rained heavily yesterday prevented us from coming.
高中英语名词性从句经典错误类型的归纳与分析
高中英语名词性从句经典错误类型的归纳与分析名词性从句是高中英语中重要语法项目之一，也是历年高考的热点。
除在单项填空中对名词性从句进行考查外，短文改错也经常考查名词性从句。
现通过举例说明，对同学们在学习名词性从句时容易犯的典型错误归纳如下。
一、引导词错误（一）遗漏引导词例1：铁是良导体这是我们大家都知道的。
误：Iron is a good conductor is known to us all.正：That iron is a good conductor is known to us all.例2：老师说这篇课文很重要,我们应该背诵下来。
误：The teacher said the text was very important and we should learn it by heart．正：The teacher said the text was very important and that we should learn it by heart．例3：我必须说明，我对您的耽搁感到非常不快。
误：I must make it clear I am not at all pleased about your delay.正：I must make it clear that I am not at all pleased about your delay.析：that引导宾语从句时常可省略，但在下列情况下，不可省略that：(1)引导主语从句、表语从句或同位语从句时, 不能省略, 例1中的错误在于遗漏了主语从句的引导词。
(2)当一个动词后带有两个或两个以上的that引导的宾语从句时,第一个that可以省略，其后的that不能省略, 例2的错误恰好属于此类，故在第二个从句前加that。
(3)宾语从句被分隔时,不能省略tha t，例3的错误属于此类，应在I之前加that。
（二）多用引导词例：我问他如何解出这道题的。
名词性从句正误析
名词性从句用法正误析江苏省泗阳中学王国连高中英语中名词性从句有主语从句、宾语从句、表语从句、同位语从句。
学生在学习名词性从句后会有很多误区，现在例析如下。
【误区一】 whether与if用法等同①．If there is life on the moon is an interesting question. （×）②．Whether there is life on the moon is an interesting question. （√）【解析】第①句学生误认为主语从句在句首表示“是否”意思时，以为和引导宾语从句一样if 或whether都可用，实际上if不可用来引导主语从句，因此第②句正确。
【特别提醒】 whether与if当“是否”讲时的区别是:在引导宾语从句时两者可以互换,但在引导主语从句、表语从句和同位语从句以及介词后面的宾语从句或后面紧跟or not时通常只能用whether,而不能用if。
还如: What the doctors really doubt is whether my mother will recover from the serious disease soon. 医生真正怀疑的是我母亲是否能很快从重病中恢复过来。
本句是whether引导的是表语从句。
【误区二】 it作形式主语或形式宾语的用法①．This is a fact that English is being accepted as an international language. （×）②．It is a fact that English is being accepted as an international language. （√）【解析】在这种名词性从句中为了保持句子的平衡,往往用先行词it作形式主语或形式宾语,而把真正的主语或宾语放到后面,从而避免“头重脚轻”，尤其是that引导的主语从句往往用先行词it作形式主语.此句也可以改写为:That English is being accepted as an international language is a fact. 还如: I hate it when people talk with their mouths full. 此句是用先行词it作形式宾语,而把真正的宾语从句放到后面.。
初中英语知识点归纳名词性从句的常见错误用法
初中英语知识点归纳名词性从句的常见错误用法初中英语知识点归纳：名词性从句的常见错误用法名词性从句是指在句子中充当名词的从句，常见的有主语从句、宾语从句、表语从句和同位语从句。
在英语学习中，很多学生在使用名词性从句时容易犯一些错误。
本文将针对名词性从句的常见错误用法进行归纳总结，帮助初中学生避免这些错误，提高英语写作和口语表达的准确性。
一、主语从句的常见错误用法1.缺少引导词：主语从句必须由引导词引导，常见的引导词有that、whether、if等，但许多学生会忘记使用引导词，导致句子不完整或意义不清。
例如：错误：I don't know the answer is correct or not.正确：I don't know whether the answer is correct or not.正确：I don't know if the answer is correct or not.2.错误使用代词：在主语从句中，应该使用主格代词作为主语，而不是宾格代词。
例如：错误：Him being late made everyone unhappy.正确：He being late made everyone unhappy.3.主从倒装：在某些情况下，主语从句与句子的谓语动词之间需要倒装，但很多学生在运用倒装时容易出错。
例如：错误：Why did she leave is still a mystery.正确：Why she left is still a mystery.二、宾语从句的常见错误用法1.缺少引导词：宾语从句同样也需要由引导词引导，常见的引导词有that、whether、if等。
例如：错误：He asked me I wanted to go with him.正确：He asked me if I wanted to go with him.2.错误使用“to”：很多学生容易将宾语从句中的动词不定式前加上“to”，导致句子结构错误。
名词性从句常见错误例析
名词性从句中要注意的几个问题一.名词性从句中主句和从句的主谓一致、语序主语从句做主语相当于单数第三人称作主语，谓语动词用单数，如果由and连接两个或两个以上的主语从句做主语时，谓语动词用复数；由两个或多个连接词引导一个主语从句，谓语动词用单数。
如：When the meeting will begin has not been decided yet.When they will start and where they go have not been decided yet.名词性从句在句中要用陈述句语序。
如：He asked me what was the matterwith me.We’ve heard the news that well move into the new house.二.名词d eman d, suggest ion, proposa l, advice等词后的同位语从句的语气要用虚拟语气,结构为 should+ do, should可省略1.He gave me a suggest ion that I ( should) be calm now.2.The suggest ion that the plan (should) be delayed will be discuss ed tomorro w.三.whateve r/whoever的功用：Whateve r/whoever可引导主语，宾语，表语从句，并在从句中做主语，宾语，表语。
这种用法中，whateve r/whoever不含疑问意义。
Whateve r=anythin g that; whoever=anyonewho 1. Whoever breaksthe law is to be punishe d.Anyonewho breaksthe law is to be punishe d.2. They will do whateve r he wants them to do.They will do anythin g that he wants them to do.疑问词 + ever和no matter+ 疑问词的区别：①疑问词 + ever可引导名词性从句，在主从句中要充当一定的成分。
名词性从句常见错误及练习
英语语法：名词性从句常见错误例析1. 【误】 He will come back surprises all of us.【正】 That he will come back surprises all of us.【析】 that引导名词性从句时,尽管无意义也不充当成分,但除了在动词后引导单个宾语从句时可省略外,其它情况不能省略。
2. 【误】That he really means is what he doesn’t agree with us.【正】 What he really means is that he doesn’t agree with us.【析】 that和what均可引导名词性从句，区别在于：what在名词性从句中作主语、宾语或表语，而that在名词性从句中不作任何成分，只起连接作用。
误句的主语从句应该用what作means的宾语，表语从句中应该用that，that在从句中不作任何成分。
3. 【误】 The news which our team had won pleased everyone.【正】 The news that our team had won pleased everyone.【析】 which在此句中不充当成分，说明从句不是定语从句而是同位语从句。
同位语从句不能用which引导，故改为that。
4. 【误】 The reason why he failed in the exam was because he was too careless.【正】 The reason why he failed in the exam was that he was too careless.【析】主语为reason时，引导表语从句的关联词一般用that，不用because，构成The reason why/forwhich/that/for .. . is that . . 句型。
例析名词性从句的常见错误
例析名词性从句的常见错误作者：王永辉来源：《青苹果·高二版》2016年第07期名词性从句是高中英语学习中的重要语法项目之一，根据句法功能的不同，分为主语从句、宾语从句、表语从句和同位语从句。
而高考大纲只列出了除同位语从句之外的其他三种从句，所以这三种从句是我们必须要掌握的。
由于名词性从句所涉及的语法细则较多，在平时学习中，学生经常会犯这样或那样的错误，本文将通过正误辨析的方式列出在名词性从句练习中的常见错误。
一、that与what的混用误 I truly believe what beauty comes from within.（改编自2015年北京卷）解析 what引导名词性从句时，在从句中可以作主语、宾语或表语，意为“……东西/事情”或“什么”；that引导名词性从句时，在句中不作成分，也无意义。
本题从句部分为结构和意思均完整的宾语从句，故需用that引导。
正 I truly believe that beauty comes from within.二、that的漏用误 One reason for her preference for city life is she can have easy access to places like shops and restaurants. （改编自2010年上海卷）解析 that引导名词性从句时，除了宾语从句中可以省略，其余类型从句中不可省略。
本题中is之后的部分为表语从句，且该表语从句中不缺少任何成分，故用that引导且不可省略。
that引导名词性从句时不可省略情况还有：1. 当一个句子里，有两个以上并列的宾语从句时，引导第一个宾语从句的that可以省略，其余的不可省略。
2. 由it作形式宾语时，that引导的宾语从句中，that大多不可省略。
正 One reason for her preference for city life is that she can have easy access to places like shops and restaurants.三、whether与if 的混用误 The limits of a person？蒺s intelligence，generally speaking，are fixed at birth，but if he reaches these limits will depend on his environment.（改编自2012年安徽卷）解析 whether引导的主语从句既可放在句首也可放在句尾，但if引导的主语从句只能放在句尾，前面用it作形式主语。
名词性从句常见错误例析
名词性从句常见错误例析作者：刘玉来源：《教育研究与实践》2008年第07期名词性从句是中学英语语法的重点和难点,许多学生在使用时容易犯这样或那样的错误。
现就学生常犯的一些错误分析如下:一、混淆that与what的用法1.【误】That we need is more practice.【正】What we need is more practice.【正】All(that)we need is more practice.解析:that在引导名词性从句时本身没有意义,也不在从句中充当句子成分,只起连接的作用;what引导的名词性从句意为"……的东西(事情)"或"什么",在从句中可以充当主语、宾语、表语,相当于all that。
本句中的what充当need的宾语。
二、混淆if与whether的用法2.【误】The question is if we should ask them for help.【正】The question is whether we should ask them for help.3.【误】It depends on if the manager will agree to the plan or not.【正】It depends on whether the manager will agree to the plan or not.4.【误】We didn/t know if or not she was ready to start work.【正】We didn/t know whether or not she was ready to start work.解析:if只能引导宾语从句,而whether则能引导各种名词性从句(除否定的宾语从句外)。
而且,作介词的宾语时,只能用whether引导。
whether引导宾语从句可与or not直接连用,而if则不能。
名词性从句的六大误区
名词性从句的六大误区误区一： that 与what 的混用1. That they are going to discuss at the meeting is how to increase food supply in the world.(错误)What they are going to discuss at the meeting is how to increase food supply in the world. (正确)注：that在引导名词性从句时本身没有意义，也不在从句中充当任何成分；而what则表示“什么”“……的东西或事情”，在从句中充当主语，宾语或表语等。
上句中的what 应充当discuss的宾语。
误区二：if 与whether的混用2. If we will visit the Great Wall tomorrow has not been decided yet. (错误)Whether we will visit the Great Wall tomorrow has not been decided yet. （正确）注：if 与whether 引导宾语从句时往往可换，但在下面情况时常使用whether：作介词的宾语时，见例①；在从句中提出两种选择时，见例②；从句提前时，见例③；引导主语从句，表语从句及同位语从句时，见例④。
①I worry about whether I hurt his feelings.②She wasn’t sure whether she should laugh or cry.③Whether he will come or not I don’t quite know.④What many people are worried about is whether we will be able to build a better future.We have some doubt whether they can complete the task on time.误区三：that 与because 的混用3. ⑴The reason why he was late for s chool was because he got up late. (错误)The reason why he was late for school was that he got uplate. (正确)⑵Why farmland here is being lost is because farmers have cut down too many trees in recent years.(错误)Why farmland here is being lost is because farmers have cut down too many trees in recent years. (正确)注：reason作主语时引导的表语从句或why引导的名词性从句时常用that不用because.误区四：忽略连词that4. These old languages are now threatened and may disappear is a serious matter to the people in Britain. (错误) That these old languages are now threatened and may disappear is a serious matter to the people in Britain. (正确) 注：that在引导宾语从句时常常可省，但在下面情况时不可省去：宾语从句不止一个时，见例①；宾语从句与主句之间有插入语时，见例②；宾语从句为一个主从复合句时，见例③；引导主语从句，表语从句或同位语从句时，见例④。
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名词性从句的六大误区
误区一：that 与what 的混用
1. That they are going to discuss at the meeting is how to increase food supply in the world.(错误)
What they are going to discuss at the meeting is how to increase food supply in the world. (正确)
注：that在引导名词性从句时本身没有意义，也不在从句中充当任何成分；而what则表示“什么”“……的东西或事情”，在从句中充当主语，宾语或表语等。
上句中的what 应充当discuss的宾语。
误区二：if 与whether的混用
2. If we will visit the Great Wall tomorrow has not been decided yet. (错误) Whether we will visit the Great Wall tomorrow has not been decided yet. （正确）注：if 与whether 引导宾语从句时往往可换，但在下面情况时常使用whether：作介词的宾语时，见例①；在从句中提出两种选择时，见例②；从句提前时，见例③；引导主语从句，表语从句及同位语从句时，见例④。
①I worry about whether I hurt his feelings.
②She wasn’t sure whether she should laugh or cry.
③Whether he will come or not I don’t quite know.
④What many people are worried about is whether we will be able to build a better future.
We have some doubt whether they can complete the task on time.
误区三：that 与because 的混用
3. ⑴The reason why he was late for school was because he got up late. (错误)
The reason why he was late for school was that he got up late. (正确)
⑵Why farmland here is being lost is because farmers have cut down too many trees in recent years.(错误)
Why farmland here is being lost is because farmers have cut down too many trees in recent years. (正确)
注：reason作主语时引导的表语从句或why引导的名词性从句时常用that不用because.
误区四：忽略连词that
4. These old languages are now threatened and may disappear is a serious matter to the people in Britain. (错误)
That these old languages are now threatened and may disappear is a serious matter to the people in Britain. (正确)
注：that在引导宾语从句时常常可省，但在下面情况时不可省去：宾语从句不止一个时，见例①；宾语从句与主句之间有插入语时，见例②；宾语从句为一个主从复合句时，见例③；引导主语从句，表语从句或同位语从句时，见例④。
①They complain (that) they have to work from morning till night, that it is hard to earn money, that they are bullied (欺负) by the policemen, or that the corporation leaders are seated lazily and enjoy the fruits of others’work.
②The teacher said, pleasantly and firmly , that we must overcome the difficulties.
③We believe that if we work harder, I will pass the National College Entrance Examination.
④The trouble is that she has lost his address. (表语从句)
Word came that China launched its first manned spaceship on Oct.15,2003. （同位语从句）
误区五：no matter who\what\which\how\wher e…与
whoever\whatever\whichever\however\wherever…
5. No matter who breaks the rules will be punished. (错误)
Whoever breaks the rules will be punished. (正确)
注：whoever,whatever,whichever,however,wherever等连词可以引导名词性从句也可引导让步状语从句，而no matter who\what\which\how\where…只能引导让步状语从句。
例如，
No matter how great the difficulty is, we ought to keep on.
Or: However great the difficulty is, we ought to keep on .
误区六：相似句型的混淆
6．As is known to all that science plays an important part in the development of industry and agriculture. (错误)
As is known to all, science plays an important part in the development of industry and agriculture. ( 正确)
It is known to all that science plays an important part in the development of industry and agriculture. (正确)
注：as作为关系代词引导的非限制性定语从句位于主句之前时，从句与主句之间要用逗号隔开。
It作为形式主语将that 引导的主语从句后置时，that 常常不能省。