名词性从句考点大全
名词性从句完整版
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从出题者的角度，就是要考察名词性从句中的语序以及引导词之间的区别。有时候，会结合插入语或名词与同位语隔开，或使句子结构复杂化等使得难度增加。其实，总的难度和变化都不大。但是从考生的角度来说，如果考生对句子结构掌握不过硬，对某些词或词组的用法不了解，就会容易造成和定语从句、状语从句的混淆，造成根本环节的误判而用其他从句的规则去解题。造成丢分。
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⒊连接副词：引导从句并作从句的状语 when—表示时间 where—表示地点 why—表示原因 how—表示方式 ①When we’ll have a meeting is not decided. ②I don’t know where I can buy such a book . ③ Why he did it will remain a puzzle forever. ④The question is how we should carry out the plan.
正：It was doubtful if /whether Mary really heard him.
误：If Mary really heard him is really doubtful.
正：Whether Mary really heard him is really doubtful.
eg.Wherever he goes makes his parents worry.
( 主语从句)
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注意：
如何选用连接词？
用法规则:
先根据从句的结构确定用哪种连接词，从句
不缺成分用连词，缺主语、宾语、表语、定语用
连接代词，缺状语用连接副词，再根据从句意思
英语名词性从句讲解【完整版】
2、I asked him if he could do me a favor .
If与whether的区别：
1、If不能引导放于句首的主语从句，而whether可以。 2、引导表语从句用whether，不用if。 3、引导同位语从句用whether，不用if。 4、whether可以引导从句作介词的宾语，不用if 。 5、whether or not 连在一起可以，但if不可以。而 “whether-----or not = if -----or not”
同位语从句：
定义：在复合句中充当同位语的句子。 同位语从句用来对其前面的抽象名词进行解释说明，被解释说明的词和 同位语在逻辑上是主表关系。 同位语常见名词：fact, suggestion, advice, idea, decision, news, thought, hope, belief, truth, doubt, promise, possibility, truth, warning, message, reason, report, question，explanation, wish, problem等。 常见的连接词：that, whether, what, who, how, when, where等。 用法： The thought that I want to buy my mother a birthday gift makes me excited.that 引导的同位语从句，解释说明 thought，从句不缺成 分 There is some doubt whether he will come. whether 引导同位语从句，if 不能引导同位语从句 we haven’t made the decision where we are going to spend our vacation. 有时同位语从句可以不紧跟解释说明的名词后面。 The news is surprising that he won the match.
名词性从句知识点总结
名词性从句知识点总结一、名词性从句作主语名词性从句可以作为主语，通常由关系代词引导，包括 that, who, whom, whose, which 等。
例如：1. What he said is true.（他说的是真的。
）2. Whoever comes late will be punished.（谁迟到谁受惩罚。
）二、名词性从句作宾语名词性从句可以作及物动词的宾语，常由连接词 that, if, whether 等引导。
例如：1. He said that he would come.（他说他会来。
）2. I don’t know whether she is coming.（我不知道她是否会来。
）三、名词性从句作表语名词性从句可以作表语，通常由连接词 that, whether, who 等引导。
例如：1. The problem is whether we should go.（问题是我们是否要去。
）2. My hope is that you can help me.（我的希望是你能帮助我。
）四、名词性从句作定语名词性从句可以作定语，通常由关系代词引导，包括 that, who, whom, whose, which 等。
例如：1. The book that I bought yesterday is very interesting.（我昨天买的书非常有趣。
）2. The girl who is standing there is my sister.（站在那里的女孩是我的妹妹。
）五、名词性从句作同位语名词性从句可以作同位语，通常由连接词 that 引导。
例如：1. The news that she has passed the exam is exciting.（她通过考试的消息让人兴奋。
）2. The fact that he is leaving surprises me.（他要走的事实让我感到惊讶。
高考英语考点 70名词性从句
考点七十名词性从句1．名词性从句必须采用陈述语序。
①I want to know what he has told you．我想知道他告诉了你什么。
②She always thinks of how she can work well．她总是在想怎样能把工作做好。
2．it充当形式主语或宾语：在名词性从句中，为了使句子保持平衡，常用先行词it来代替主语从句或宾语从句，而把主语从句或宾语从句放到后面，尤其是连词that引导的主语从句常用于此句式中。
①It is known to us how he became a writer．我们都知道他是如何成为一名作家的。
②I find it strange that she doesn’t want to travel．她竟不想旅游，我觉得很奇怪。
3．在名词性从句中that与what的差异：what在从句中要充当某个成分(主语、宾语或表语)，在任何情况下都不能省略，表示＂(＝the thing or things that...; whatever)……的事物；无论什么；凡是……的事物＂。
that本身没有词汇意义，在从句中不充当任何成分，在口语和非正式文件中，宾语从句中的that常常省略。
①What you have done might do harm to others．你所做的事或许对别人有害处。
②I spent what little time I had with my family．我仅有的一点儿时间都和家人在一起度过了。
③No one knows what will happen next．谁也不知道下一步有什么事。
④I think(that) you will like the stamps．我认为你会喜欢这些邮票的。
4．whether和if的差异：（1）引导主语从句、表语从句或同位语从句，只能采用whether。
☞Whether there is life on the moon is an interesting question．月球上有没有生命是个有趣的问题。
【英语】名词性从句知识点(大全)
【英语】名词性从句知识点(大全)一、名词性从句1．_______is known to us all is that Johnson broke his promise ______ he would come to help me as soon as possible.A. It; thatB. What; thatC. As; whichD. What; which【答案】 B【解析】【分析】句意：我们都知道，Johnson违背了他会尽快来帮助我的诺言。
分析句子结构可知，第一空为主语从句，从句中缺少主语，所以用what，第二空为同位语从句，从句结构完整，所以用that解释promise的内容，故选B。
【点评】考查名词性从句，本题涉及主语从句和同位语从句。
2．___ surprised me most was ____the girl passed the driver test.A. That; thatB. What; howC. What; thatD. That; why【答案】 C【解析】【分析】句意：最让我吃惊的是那个女孩通过了驾驶考试。
___ surprised me most是一个主语从句，从句中缺少主语，故填what；____the girl passed the driver test 是一个表语从句，句中不缺少成分，故填that。
因此选C。
【点评】考查名词性从句，本题涉及what引导的主语从句和that引导的表语从句。
3．________ is known to us all that the old scientist, for ________ life was hard in the past, still works hard in his eighties.A. As; whoseB. It; whoseC. As; whomD. It; whom【答案】 D【解析】【分析】句意：我们都知道，那位老科学家，过去生活很艰苦，到了八十多岁还在努力工作。
名词性从句七大考点
It doesn’t matter whether…
第八页，共32页
It is well known/reported/ thought/said that…
第四页，共32页
B : what (什么) / which ( 表选择, 哪一 个)
1. ---Do you know_w__h__a_t__Mr Black’s
address is ?
---He may live at No. 18 or No. 19 of Bridge
Street. I’m not sure of __w__h_i_c_h__.
B. what our village looks like C. how does our village look like
D. how our village looks like
第十三页，共32页
❖2.You can hardly imagine ______when he heard the news .
China. （非限制性定语从句） A. As B. That C. Which D.What
2. It is known to all____ Taiwan is only part of China.
A. as B. that C. if D. for
3. It was on Sunday ___ I met him. （强调句） A. that B.when C. what D.which
第二十二页，共32页
高考题选萃
1.____ has helped to save the drowning girl is worth praising.
名词性从句要点总结
名词性从句要点总结名词性从句相当于名词，可分别作主句的主语、表语、宾语和同位语。
（一）引导名词性从句的连接词（二）主语从句1、主语从句在复合句作主语。
e。
g. Who will go is not important.2、用it作形式主语，主语从句放在句末。
e。
g。
It doesn't matter so much whether you will come or not.3、that引导主语从句时，不能省略.e。
g. That he suddenly fell ill last week made us surprised。
（三)表语从句1、表语从句在复合句中作表语，位于系动词之后。
e。
g. The question was who could go there。
2、that 引导表从不能省略（四）宾语从句宾语从句在复合句中作宾语。
引导宾语从句的连词that一般可省略。
e。
g. I hope (that) everything is all right.宾语从句的位置1.动宾结构：从句在动词后After she heard _that_ most of the members voted against her, she managed a smile。
2. 介宾结构:从句在介词后面I think Henry will be happy with _what_is inside the envelope.（错误）This story is about that NiuLang and ZhiNv met each other by accident on the earth and fell in love.注意：一般情况下，介词后面不接that从句；介词except，but, for，besides, in等除外3。
接在某些形容词之后The owner of the restaurant were frightened / afraid (that)_ Henry would not come back again and _that he would tell his friends about the bad treatment he got in the restaurant。
名词性从句考点归纳与解析
inspired us. 5.I don’t think it necessary ___t_h_a_t___ you
got the money. 3.He gave us many suggestions __t_h_a_t___ we
should get up earlier and take more exercise. 4.I have no doubt ___t_h_a_t__ he will win. 5. I have some doubt _w_h_e_t_h_e_r_ he will win.
A. As; which
B. As; that
C. It; that
D. What; that
【解析】 选 C。it作形式主语，第一个that后引导从 句作真正主语。名词promise后接that引导的同位语从 句。对前一名词内容进一步补充说明。
例2：Helping others is a habit, one ______ you can learn even at an early age. (2011·山东卷改编)
His job is important.
{ 主语 What he does is important. This is his job.
{ 表语 This is what he does every day.
{I don’t like his job.
宾语 I don’t like what he does every day.
名词性从句知识点总结
名词性从句（一）围绕名词性从句的连接词1、连接代词：w h o,w h o s e,w h o m,w h a t,w h i c h。
有词义，在从句中担任成分，如主语、表语、宾语、或定语等。
2、连接副词：w h e n,w h e r e,w h y,h o w。
有词义，在从句中担任成分，作状语。
3、连接词：t h a t,w h e t h e r,i f,a s i f。
t h a t无词义，在从句中不担任成分，有时可省略；i f(w h e t h e r),a s i f虽有词义，但在从句中不担任成分。
注重：1、连接代词与连接副词在句中不再是疑问句，因而从句中谓语不用疑问式。
连接代词与连接副词在从句充当句子成分，连接词w h e t h e r和i f（是否），a s i f（好象）在从句中不充当句子成分，只起连接作用。
根据句义，如果连接代词与连接副词，w h e t h e r、i f和a s i f都用不上时，才用t h a t 作连接词（t h a t本身无任何含义）。
2、不可省略的连词：（1）介词后的连词（2）围绕主语从句和同位语从句的连词不可省略。
T h a t s h e w a s c h o s e n m a d e u s v e r y h a p p y.W e h e a r d t h e n e w s t h a t o u r t e a m h a d w o n.（二）主语从句1、主语从句在复合句作主语。
e.g.W h o w i l l g o i s n o t i m p o r t a n t.2、用i t作形式主语，主语从句放在句末。
e.g.I t d o e s n’t m a t t e r s o m u c h w h e t h e r y o u w i l l c o m e o r n o t.主要句型有：（1）I t+b e+形容词+t h a t从句。
名词性从句五大常考考点及常见错误
1. _________ he said so made us angry . That
What ________ he said at the meeting made us angry. what 2. A computer can only do_________ you have instructed it to do. （01全国）
考点3.选择填空 （what,whatever,who,whoever)
1._________ Whatever
was said here must be
kept secret. 2. _______we need is more time. What 3._______ made the long distance Who call to him is not important. Whoever 4._________ breaks the law will be punished.
3.These wild flowers are so special that I will do ____ I can to save them. ☆ whatever B. that A. C. which D. whichever
4. It is generally considered unwise to give a child ____ he or
考点1：连接词： that 与 what 的区别
What we can’t get seems better than what we have .
That (a new teacher will come to our school ) is true .
that 只起连接作用，无意义，在从句中不
(完整版)英语名词性从句知识归纳
名词性从句知识归纳名词性从句是指在句子中相当于名词的从句，主要包括主语从句、宾语从句、表语从句和同位语从句。
名词性从句不是修饰性从句，而是复合句中的主干。
e.g. That the boy failed again in the exam disappointed his mother. （主语从句）I know that he is writing his composition in his room. （宾语从句）The question is how we can finish it on time. （表语从句）The fact that some Chinese are still poor is really a great problem. （同位语从句）一、宾语从句---及物动词、介词、部分形容词（certain, sure, glad, afraid, frightened, happy, pleased, sad, sorry, surprised, upset, satisfied等）后e.g. I believe (that) he is honest. (that不充当从句内的任何成分，一般情况可省略)I’m glad that you are satisfied with your job. (that不充当从句内的任何成分)He doesn’t care if/whether it isn’t a fine day. (if/whether不充当从句内的任何成分) Please tell me what you want. (what充当从句内的宾语)She always thinks of how she can work well.(how充当从句内的状语)I don’t believe whatever he said. (whatever充当从句内的宾语，意为“任何事”)I’ll take whoever wants to go. (whoever从当从句内的主语，意为“任何人”)【宾语从句要点拓展】1. that引导宾语从句时一般可以省略，若由and或or连接两个宾语从句时，第一个从句中的that可以省略，而第二个分句前的that不可省略。
名词性从句考点整理
名词性从句考点整理●主语从句(谓语动词前)●定义●连接词(一定名从，二析成分，三看句意)●从属连词:that, whether●不充当成分●不可省略●that三无●whether是否，句首句尾都可●连接代词:Who(ever), what(ever), which(ever)●在从句中充当主宾表定●连接副词:when, where, how, why●在从句中充当状语●根据语境选用●主语从句的后置●it+be+表语+主从●it+不及物动词+主从●it+及物动词被动+主从●宾语从句(动词，介词后)●定义●用that引导的情况●that的省略●that可省:从句紧挨谓语动词●that不可省:从句不紧挨谓语动词●主语+及物动词+to sb. +that从句●it作形宾，用taht引导宾从●主+系+adj+that从句●宾从的陈述语序●主语+及物动词+连接代词/副词引导的宾从用陈述语序●宾从的否定转移●第一人称有想法(think, consider, suppose, believe…), 宾从否定要转移●做题时注意句子翻译时记得把否定翻译回去●宾从的反义疑问●前肯后否，前否后肯●(主句)一人称，就从句●否定转移时的反义疑问:一人称有想法，就从句用肯定●表语从句(系动词后)●连接词:as if , because●一般结构:主系表●其他结构:●The reason… is that…●That is because…●That is why…●同位语从句(抽象名词后)●定义:抽象名词后说明解释该名词的具体内容●连接词:●同位从不用which●taht从句有时不紧挨抽象名词●同位从和定从辨析●同位从:that为连词，不当成分●定从:that为关系代词，充当主宾表。
高中英语名词性从句知识点含练习
高中英语名词性从句知识点（含练习）基础回顾1.表语：表语用来说明主语的身份、性质、品性、特征和状态的，表语常由名词、形容词、副词、介词短语、动词的-ing、不定式、从句来充当，它常位于系动词(be, become, appear, seem,look,sound,feel,get,smell等词)之后。
如：Her job is selling computers. 此句表语为selling computers如果句子的表语也是由一个句子充当的，那么这个充当表语的句子就叫做表语从句。
2.同位语：一个名词(或其它形式)对另一个名词或代词进行解释或补充说明，这个名词(或其它形式)就是同位语。
如Mr. Smith,our new teacher,is very kind to us. 我们的新老师史密斯先生对我们很好。
Mr.Smith是主语our new teacher的同位语，指同一人。
同位语从句I heard the news that our team had won．我听到了我们队获胜的消息。
that our team had won 解释news的具体内容，是同位语正文一、定义在复合句中具有名词的性质的作主语、表语、同位语、宾语的从句叫名词性从句。
因此，我们把主语从句、表语从句、同位语从句和宾语从句这四种从句统称为名词性从句。
That he finished writing the composition in such a short time surprised us all他在很短的时间内写完作文让我们都很惊讶 (主语从句)The trouble is that she has lost his address. 麻烦的是她把他的地址搞丢了。
（表语从句）They have no idea at all where he has gone. 他们不知道他去什么地方了。
（同位语从句）Do you remember how he came? 你记得他怎么来的么？（宾语从句）二、语序名词性从句要采用陈述句语序。
高考英语语法专攻-《名词性从句》-考点归纳+针对性练习
高中英语语法专攻-《名词性从句》【考点1-引导词】【考点2-主语从句】①定义：主语从句是指在复合句中充当主语的句子，它是名词的拓展，属于主语的第三个表达层次。
所以，主语从句和名词一样通常是出现在谓语动词的前面。
②主语从句的引导词：从属连词：that、whether、if（不可位于句首）连接代词：what, whatever/who, whoever/whom, whomever/whose,whosever/which,whichever连接副词：when, whenever/where,wherever/how, however/whythat引导主语从句（that无含义，在句中不作成分，不可省略）That youth is wholly experimental is known to us all。
众所周知，青春就是探索的岁月。
That she finished reading an English novel surprised us all.她读完了一部全英文小说让我们惊讶That you will win the medal seems unlikely.你赢得奖牌似乎是不可能的。
That he is still alive is a wonder.他还活着，真是奇迹。
That we shall be late is certain.我们要晚了，这是确定无疑的。
That she is still alive is a consolation.她还活着是使人感到宽慰的。
Whether引导主语从句（whether有含义“是否”，在句中不作成分，不可省）Whether she will come to the party makes no difference.她来不来参加聚会都没有关系。
It makes no difference whether/if she will come to the party.W hether he is coming or not doesn’t matter too much.他来或不来都不怎么重要It doesn’t matter too much whether he is coming or not.Who,whom, what, which,whose（连接代词）引导主语从句（连接代词有含义，在句中起名词性作用，担当一定成分）Who will be the leader of the team has not been decided yet.谁会成为这个队的领头人还没定下来。
(完整版)高中英语语法总结-名词性从句
名词性从句在句子中起名词作用的句子叫名词性从句（Noun Clauses）. 名词性从句的功能相当于名词词组, 它在复合句中能担任主语、宾语、表语、同位语、介词宾语等，因此根据它在句中不同的语法功能，名词从句又可分别称为主语从句、宾语从句、表语从句和同位语从句.第一节知识点讲解顾名思义,主语从句在句子中作主语。
有时本身出现在主语的位置上，也有时出于句子结构的考虑退到句子的尾部,前面用形式主语it代替。
从句作主语时,谓语动词一般为单数形式。
如：What I saw was beyond any verbal description。
That his hair was turning grey worried him a bit。
Why the company denied the contract is still unknown。
When and where the government will build a city square is under discussion.It is pretty annoying that a small part of the machine is missing。
It remains to be seen whether the new novel will be well received。
Tips：主语从句的that绝对不能省去。
因为句子是不能做主语的，故用that引导.若去掉则没有了主语，而宾语从句的that可省。
主语从句:That he is right is known to all of us.宾语从句：We all know (that） he is right.1. It 作形式主语和it引导强调句的比较It 作形式主语代替主语从句，主要是为了平衡句子结构，主语从句的连接词没有变化。
而it引导的强调句则是对句子某一部分进行强调，无论强调的是什么成分，都可用连词that.被强调部分指人时也可用who/whom。
英语名词性从句知识点
名词性从句复习要点【考点1】名词性从句中连接词的运用：连接代词：what ，who，which，whose，whatever，whoever，whomever，whichever连接副词：where / when / why / how / wherever / whenever，that，whetherEverything depends on whether you have enough time.No one knows what our life will be like in the future.The reason why he was late was that he took the wrong bus.【考点2】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.They expressed the hope that they would come to visit China again.(同位语从句)The hope she expressed is that they would come to visit China again.（定语从句）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）当两个并列的宾语从句同时作宾语时，第二个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。
名词性从句知识点
名词性从句1.概念：在从句中做主语/宾语/表语/起解释说明的作用（同位语）。
或者说是起名词作用的从句。
名词性从句一律用陈述语序。
2.分类：主语从句/宾语从句/表语从句/同位语从句3.连接词：⑴连接代词（who谁，主格；whom谁，宾格；whose谁的，所有格；what什么，which哪一个，whatever无论什么，whichever无论哪个，whoever无论谁）；⑵连接副词：when,where,how,why,⑶由if/whether引导，在句中意为“是否”。
用法：①句子成分完整，用that；②成分完整，意思不完整，用whether/if（是否），连接副词（when/where/why/how）/+ever；③成分不完整：指人用who（主/宾）whom（宾）whoever（主/宾）whomever（宾）；指物:用what（主/宾）。
4.详解：⑴主语从句：用来充当整句话的主语。
①主语从句在复合句中作主语的名词性从句，通常放在主句谓语动词之前。
that在从句中只起连接词作用且不可省略。
Whether she will come to the party is uncertain.A.陈述句做主语从句的转化方式，用that 引导。
The earth goes around the sun.=That the earth goes around the sun is a fact.B.一般疑问句转化为主语从句，只能用whether来引导，不能用if。
一般疑问句语序转化为陈述语序。
Will it rain tomorrow?=Whether it will rain tomorrow is not know.C.特殊疑问句变为主语从句，还是用原来的疑问词引导(特殊疑问句有两种结构，一种是疑问词＋一般疑问句；另一种是特殊疑问句本身就是陈述结构)What does she want?=What she wants is a trip to Lijing.她想要的是去丽江旅行。
名词性从句考点复习
何成分, 不可省（在宾语从句及物动词后可省）
what 既起连接作用, 又在从句中作 主语, 宾语, 表
语 (且在名词性从句中只有what可作表语）
He said (that) the text was import and that we should recite it.
(4) 表示"建议、请求、命令、要求、决定等"意思 的名词后面的同位语从句中谓语动词要用虚拟语 气"(should)+do"。如:
They received orders that the work(should)be done at once.
1 It is strange that he _____ without saying good-bye to us
考例2：It is necessary that a college student ______ at least a foreign
☆ language.
A. masters B. should master C.mastered D. will master
(1) 在主语从句中用来表示惊奇、不相信、 惋惜、理应如此等,谓语动词用虚拟语气 “(should) +do”,常用的句型有:
2. 连接代词 ：who、 whom 、whose、 what、
which
作主/宾/
表
3. 连接副词： when、 where、why、how
作状语
1 that 与 what 的区别
What he said makes me happy. That a new teacher will come is true .
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名词性从句名词性从句引导词的基本用法：概念：（一）同宾语、名词性从句是指可以像名词一样在句子中充当主语、表语、了解各种引导词的使用首先要从整体上把握其基本形式，位语的从句。
对于名词性从句，同位语从句各自的一些特征。
表语从句、宾语从句、方法。
其次，要分别了解主语从句、（二）名词性从句的引导词名词性从句的引导词引导词是否在名词性从句中充当成分的情况连接代词：what, which, who, whom, whose连接副词：when, where, why, how, what, which在从句中作主语、宾语、表语或定语；who在从句中作主语、表语；whom在从句中作宾语；whose在从句中作定语；when, where, why, how在从句中分别作时间状语、地点状语、原因状语、方式状语连词: that;whether, if否名词性从句的引导词：1. 引导特殊疑问句的疑问词在转为引导名词性从句时，即成为连接代词(主要包括what, which, who, whom, whose)或者连接副词(主要包括when, where, why, how)。
注意体会如下例句：Choose which you like best. 选你最喜欢的。
// Who has taken away my bag is unknown. 谁拿走了我的包还不知道。
// Have you decided whom you are to nominate as your candidate? 你们是否已经决定提名谁做候选人了?// He asked when Mr. Gilbert would be allowed to go home. 他问什么时候可以允许吉尔伯特先生回家。
// Where we can look up his address is still a problem. 我们在哪儿可以查到他的地址还是个难题。
// Why he did that wasn't quite clear. 他为什么做那件事还不十分清楚。
// How they will solve the serious problem has not been decided. 他们将怎样解决这个严重问题还没有决定。
以下两种特殊情况要给予特别关注：也可以的问题，”？……什么“作连接代词引导的名词性从句既可以表示一个问what(1)．表示相当于“名词/代词＋关系代词引导的定语从句”结构的意思，这种特殊用法在语法上被称作“关系代词型的what”，注意体会如下例句：He is not what (=the person that) he was a few years ago. 他不是几年前的他了。
// This is what (=the place that) they call Salt Lake City. 这就是他们称作盐湖城的地方。
// What (=the place that) is now the North Sahara Desert was once a civilized world. 现在的北部撒哈拉沙漠曾是一个文明世界。
// Our income is now double what (=the income that) it was ten years ago. 我们现在的收入是十年前的两倍。
// The color of the flower is different from what (=the color that) it was in the morning. 花朵(现在的)颜色与它早上的颜色不同。
(2) 带'ever后缀的疑问词除引导让步状语从句之外，还可以引导名词性从句(“no matter＋疑问词”的结构只能引导让步状语从句，不可以引导名词性从句)，注意体会以下例句：Whoever wants to see this film can go with us tonight.无论谁想看这部电影，今晚都可以和我们一起去。
// You can give the ticket to whomever you like. 你可以把票给任何你想给的人。
// All the books are here. You may borrow whichever (book) you like. 所有的书都在这儿，你愿借哪本就借哪本。
// I'll do whatever you ask me to do. 你叫我做什么，我就做什么。
2. that引导名词性从句时后面接完整的陈述句，that只起引导名词性从句的作用而不充当该名词性从句中的具体成分；引导宾语从句时that常可省略，但引导主语从句、表语从句、同位语从句时that通常不被省略。
例如：She hoped (that) he would arrive on time. 她希望他按时到达。
(宾语从句)That she was chosen made us very happy. 她被选中了让我们很开心。
(主语从句)I have the belief that I will succeed. 我怀有必胜的信念。
(同位语从句)that，what引导名词性从句的区别在于：that在其引导的名词性从句中不充当任何成分，在有的情况下可以省略；what需要在其引导的名词性从句中充当主语、宾语、表语或者定语，而且引导名词性从句的what在任何情况下都不能省略。
例如：That he will succeed is obvious. 显然，他会成功。
(引导主语从句的that不在其中充当具体的句子成分)在其引导的主语从句中作(what她所告诉我的都不是真的。
What she told me is not true.宾语)3. whether与if均可以引导表示“是否”之意的名词性从句，且whether与if均不在这种名词性从句中充当具体的句子成分。
在引导宾语从句时whether与if一般可以互换，但在引导主语从句、表语从句、同位语从句、介词后的宾语从句、放于句首的宾语从句或者名词性从句中包含or (not) 时通常只能用whether作引导词。
注意体会下列例句：I don't know if/whether I can help you. 我不知道我能否帮助你。
(宾语从句)// Whether we can really help you, I don't know yet. 我们是否真的能帮助你，我还不知道。
(位于句首的宾语从句)// The teacher worried about whether he had hurt the girl's feelings. 老师为是否伤害了那女孩的感情而担心。
(介词后的宾语从句)// The question is whether they can cooperate with us. 问题是他们能否与我们合作。
(表语从句)// The question whether he should come himself or send a substitute must be decided upon.他该亲自来还是派人替他来，这个问题必须定下来。
(同位语从句)// The little girl asked her father whether she should go to the party or not. 那女孩问她的父亲她应不应该参加这个晚会。
(包含or not的宾语从句)注意：肯定形式的doubt后面通常接whether/if引导的宾语从句，否定形式的doubt后面通常接that引导的宾语从句，例如：I doubt whether it's true. 我怀疑它是否是真实的。
// I doubt if that was what he wanted. 我怀疑那是否是他所想要的。
// I don't doubt that you are honest. 我不怀疑你的诚实。
// She never doubted for a moment that she was right. 她对自己是正确的这一点从不怀疑。
［考题1］—Could you do me a favor?—It depends on ____ it is. (2006北京)A. whichB. whicheverC. whatD. whatever［答案］ C［解析］下划线处的引导词引导on后的宾语从句，并且在该宾语从句中充当表语，表示疑问句“What is it? (你要我帮的忙是什么？)”的含义。
注意：题干中没有用“whatever”进行强调的必要。
I think it's going to be a big problem.—］2［考题—Yes, it could be.—I wonder ____ we can do about it. (2002北京春)A. ifB. howC. whatD. that［答案］ C［解析］下划线处的引导词引导wonder后的宾语从句并且在该宾语从句中充当do的宾语，if，that引导名词性从句时都不充当名词性从句中的句子成分，how引导名词性从句时充当名词性从句中的方式状语，因此应排除A、B、D而选出C。
本题中what we cando about it可以理解为对应于疑问句“What can we do about it?”的名词性从句，what引导的这种名词性从句跟其他疑问词形式的引导词所引导的名词性从句的含义相近。
［考题3］You can only be sure of ____ you have at present: you cannot be sure of something____ you might get in the future. (2007安徽)A. that; whatB. what; 不填C. which; thatD. 不填; that［答案］ B［解析］第一个下划线处应填入一个可以引导of的宾语从句泛指“你现在所拥有的东西”且在该宾语从句内部充当have的宾语的词，这样的引导词只能是what，由此可以直接排除选项A、C、D而选出B。
［考题4］____ we can't get seems better than ____ we have. (1996)A. What; whatB. What; thatC. That; thatD. That; what［答案］ A［解析］名词性从句what we can't get和what we have中what都充当宾语，都属于关系代词型的what，本身不表示疑问而表示泛指相关的事物；“what we can't get”相当于包含定语从句的“things that we can't get”，“what we have”相当于包含定语从句的“things that we have”。