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名词性从句讲解在复合句中起名词作用的从句叫做名词性从句。
它包括主语从句、宾语从句、表语从句和同位语从句。
名词性从句是中学阶段的一个重要语法项目，在历年的高考中几乎都涉及到，并且每年的命题各有变化。
分析历届高考试题名词性从句考查的焦点主要有以下六个方面1. 考查名词性从句的语序问题2. 考查引导词that与what的区别3. 考查it在名词性从句中作形式主语或形式宾语的用法4. 考查whether与if的区别5. 考查名词性从句中的疑问词+ever引导的名词性从句与no matter+疑问词引导的状语从句的区别6. 考查名词性从句的虚拟语气问题语法要点剖析一、名词性从句主语从句、表语从句、宾语从句、同位语从句，在整个句子中所起的作用，相当于一个名词。
因此，这四种从句通称为名词性从句。
引导名词性从句的连接词可分为三类：连接词：that, whether, if （不充当从句的任何成分）连接代词：what, whatever, who, whoever, whom, whose, which.连接副词：when, where, how, why1. 主语从句作句子主语的从句叫主语从句。
主语从句通常由从属连词that，whether，if和连接代词what，who，which，whatever，whoever以及连接副词how，when，where，why等词引导。
that在句中无词义，只起连接作用；连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用，在从句中充当从句的成分。
例如：What he wants to tell us is not clear. 他要跟我们说什么，还不清楚。
It 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。
Where the English evening will be held has not yet been announced.英语晚会将在哪里举行，还没有宣布。
名词性从句讲解在复合句中起名词作用的从句叫做名词性从句.它包括主语从句、宾语从句、表语从句和同位语从句。
名词性从句是中学阶段的一个重要语法项目，在历年的高考中几乎都涉及到，并且每年的命题各有变化。
分析历届高考试题名词性从句考查的焦点主要有以下六个方面1。
考查名词性从句的语序问题2。
考查引导词that与what的区别3. 考查it在名词性从句中作形式主语或形式宾语的用法4。
考查whether与if的区别5。
考查名词性从句中的疑问词+ever引导的名词性从句与no matter+疑问词引导的状语从句的区别6。
考查名词性从句的虚拟语气问题语法要点剖析一、名词性从句主语从句、表语从句、宾语从句、同位语从句，在整个句子中所起的作用,相当于一个名词.因此，这四种从句通称为名词性从句。
引导名词性从句的连接词可分为三类：连接词：that, whether，if （不充当从句的任何成分）连接代词：what，whatever, who, whoever，whom，whose, which。
连接副词：when, where, how, why1. 主语从句作句子主语的从句叫主语从句。
主语从句通常由从属连词that，whether，if和连接代词what，who，which，whatever，whoever以及连接副词how，when，where，why等词引导。
that在句中无词义，只起连接作用；连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用，在从句中充当从句的成分.例如：What he wants to tell us is not clear. 他要跟我们说什么，还不清楚.It 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.Where the English evening will be held has not yet been announced.英语晚会将在哪里举行，还没有宣布.有时为避免句子头重脚轻,常用形式主语it代替主语从句作形式主语放于句首,而把主语从句置于句末.主语从句后的谓语动词一般用单数形式。
whoever = anyone who任何人, 无论谁；whatever =anything that凡是...，无论什么；whichever = anything that无论那一个, 任何一个；whomever = anyone whom （whoever的宾格形式）。
Whoever comes to the club is welcome. 不论谁来参加这个俱乐部都欢迎。
Whatever is worth doing at all is worth doing well. 凡是值得做的就值得做好。
They ate whatever they could find o the deserted island. 他们在荒岛找到什么就吃什么。
You may do whatever you will. 你可做任何你想做的事。
I'll take whichever book interests me. 我愿买任何让我感兴趣的书。
Whosever book is overdue will be fined. 不管谁的书过期未还都要被罚款。
比较：连接代词whoever在宾语从句中作主语，whomever作宾语从句中宾语。
You may offer he book to whoever wants it. 你可把这本书给任何想要的人。
（whoever在宾语从句中作主语）You may offer the book to whomever you like.你可把这本书给任何你喜欢的人。
（whomever在宾语从句中作宾语）四、if, whether引导的名词从句1.yes-no型疑问从句从属连词if, whether引导的名词从句是由一般疑问句或选择疑问转化而来的，因此也分别被称为yes-no型疑问句从句和选择型疑问从句，其功能和wh-从句的功能相同，例如：主语：Whether the plan is feasible remains to be proved. 这一计划是否可行还有等证实。
名词性从句讲解思维导图（附练习题）catch a cold。
Ⅲwhichever ‘无论哪个;无论哪些’，既指人，又指物. 可修饰名词与of连用Whichever book you borrow doesn’t matter to us。
Whichever of us fulfills his task will lend a hand to others。
定义：在复合句中充当宾语功能的句子叫宾语从句We can learn what we didn't know。
We find it necessary that we （should）practice English every day.★某些作表语的形容词，如sure，happy, glad，certain等之后可带宾语从句I am glad that you can come and help me.:①wish/would rather后的宾语从句中要用虚拟语气。
I wish I had finished my homework yesterday。
I’d rather you had been there yesterday②在表示建议,命令, 请求的词后面的宾语从句当中用should + V，可以省略His pale face suggested that he was ill so I suggested that he should goto see the doctor.He insisted that he was innocent and insisted that he should be set free.③注意it作形式宾语的结构We all thought it a pity that we had missed the lesson。
I took it for granted that they were not coming.④ that一般不接介词宾语，偶尔可作except， in的宾语；其它介词后面需用it作形式宾语He differs from his roommates in that he devoted his spare time toreading.He knows nothing about Jim except that he is from London。
名词性从句一．考点解析高考名词性从句主要考察语法填空中关联词的选用，要稳拿这一分的话，需要对四种名词性从句掌握透。
十一选十、阅读、完型的分析也需要对其概念很熟悉，在理解文章的时候才不会犯错。
翻译也会考察名词性从句，作文里面运用一些名词性从句的高级句型能起到加分作用。
二．语法详解第一节名词性从句的功能主语从句一.关联词：从属连词：that,whether,if,because.(从属连词引导名词性从句或状语从句只起引导作用，在句中不单独做句子成分）连接代词：what,who,whom,whose,whomever,whoever,which,whichever,whatever.（它们在句中既起连接作用，又在从句中做主语，宾语，表语或定语）连接副词：how,(how many,how much)when,why,where,（没有however,wherever,whenever).（它们在句中既起连接作用，又在从句在做状语，表示时间，地点，原因和方式）例如:That he survived the accident is a miracle. 他在这场事故中幸免于难真是奇迹。
Whether she comes or not makes no difference. 她来不来都没有关系（句首主语从句不用if引导）。
It is doubtful whether /if he is coming. 他是否来不得而知（主语从句不在句首可用if）。
What he needs is more experience. 他所需要的是更多的经验。
（做宾语）How the prisoner escaped is a mystery. 囚犯怎么逃的是一个谜。
（做状语）Whom we must serve is a question of vital importance. 为谁服务是个极为重要的问题。
（做宾语）Whose fault it is is quite clear now. 这是谁的过错现在已十分明了。
高中英语名词性从句引导词辨析练习题30题答案解析版1._____ is known to all, the environment is of great importance.A.WhatB.AsC.WhichD.That答案解析：B。
“As is known to all”是固定用法，意为“众所周知”，as引导非限制性定语从句，指代后面整个句子。
A 选项“What is known to all”这种表达错误；C 选项“Which”引导定语从句时要有先行词且一般用于非限制性定语从句时表示选择关系；D 选项“That”不能引导非限制性定语从句。
2.We don't know _____ he will come or not.A.ifB.whetherC.thatD.when答案解析：B。
“whether...or not”是固定搭配，表示“是否”。
A 选项“if”不能与“or not”连用；C 选项“that”在宾语从句中无实际意义，不表示“是否”；D 选项“when”表示时间，不符合语境。
3._____ he said at the meeting surprised us all.A.WhatB.ThatC.WhichD.When答案解析：A。
“what he said”在句子中作主语，“what”在主语从句中作“said”的宾语。
B 选项“That”在主语从句中不充当成分，只起连接作用，此句缺少宾语；C 选项“Which”要有选择范围；D 选项“When”在主语从句中作时间状语，此句不是时间相关的主语从句。
4.Can you tell me _____ you are waiting for?A.thatB.whoC.whomD.when答案解析：B。
此句中“waiting for”缺少宾语，根据语境询问的是人，“who”在宾语从句中作“waiting for”的宾语，且主格形式；C 选项“whom”是宾格形式，但此句需要主格；A 选项“that”在宾语从句中无实际意义，不充当成分；D 选项“When”在宾语从句中作时间状语，不符合语境。
高中英语名词性从句专题讲解及巩固练习定义：起名词性作用的从句，叫名词性从句。
本来该由名词充当的主语、宾语、表语和同位语部分，换由一个句子来充当，这样的句子就是名词性从句。
【归纳】1.只能用whether,不能用ifa.主语从句b. 表语从句c. 同位语从句e. 介词后的宾语从句f. whether to do 做动词宾语不能用if to do.g.whether or not 连在一起引导宾语从句时不用if.2.that和what的区别what除起连接作用外，还在名词性从句中充当成分，可做从句的主语、宾语、或表语。
that在名词性从句中不充当任何成分，只起连接作用。
例：I have no doubt that he will come.I have no idea what he did that afternoon.一．主语从句：在复合句中作主句的主语。
●__________ he is a famous singer is known to us.●__________ he will go to America is not yet fixed.●__________ she’s coming or not doesn’t matter too much.●__________ broke the glass yesterday is not clear.【keys】That; When/How; Whether; Who【归纳】1.为避免主语冗长,句子头重脚轻, 经常用it作形式主语, 主语从句放在后面作真正的主语。
例：That her hair was turning gray worried her a lot.-----It worried her a lot that her hair was turning gray.常考句型：It’s likely / possible / important / necessary / clear that…很可能/ 重要的是… / 必要的是… / 很清楚…It’s said / reported that…据说/据报道…It seems / appears / happens that…显然、明显、碰巧…It’s been announced / declared that…已经通知/宣布…It’s no wonder that…并不奇怪/无疑…It’s a pity/a fact /a common knowledge / a common saying that…2.if不能引导主语从句，只能用whether3.单个的主语从句作主语时，谓语动词用句单数形式；如果是两个或两个以上的主语作主语，谓语动词则视情况而定。
高中英语名词性从句详细讲解与练习在句子中起名词作用的从句叫名词性从句。
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，因此根据它在句中不同的语法功能，名词性从句又可分为主语从句、宾语从句、表语从句、同位语从句。
引导名词性从句的词叫做连接词，包括：1.连词（在名词性从句中只起连接作用，不作成分）2.连接代词（在名词性从句中作主语、宾语或表语）3.连接副词（在名词性从句中作状语）所有的名词性从句的语序都是陈述语序。
I主语从句：是在主句中作主语的从句。
它由连接词引导，通常位于谓语动词之前。
连接词：1.连词：在从句中不充当任何成分，常见的引导主语从句的连词有that, whether oThat he got the first prize excited him much.他获得一等奖一事使他非常兴奋。
It is doubtful whether we can get there on time.我们能否按时到达那儿还不确定。
D that引导的主语从句:在从句中不作任何成分，也没有实际意义。
一般情况下that不可省略。
That light travels in straight lines is known to all.众所周知，光沿直线传播。
That you don't like him is none of my business.你不喜欢他不关我的事。
2）whether引导的土语从句:常置于句首，表示“是否”之意；if一般不引导主语从句。
Whether he can finish his task on time is of greatimportance.他是否能按时完成任务非常重要。
Whether you can succeed or not depends on howhard you work at it.你能否成功取决于你努力的程度。
2.连接代词：在从句中起名词或代词的作用，常作从句的主语、宾语、表语或定语,有具体意义且不能省略。
名词性从句用法讲解与专项练习题及答案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 come.②I have a question whether he will come③I have a question when he will come.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 come.I don’t know whether/if he will come.I don’t know when he will come.表语从句：What I don’t know is that he will come.What I don’t know is whether he will come.What I don’t know is when he will come.主语从句That he will come is obvious.Whether he will come isn’t known yet.When he will come isn’t known yet.1.【2010浙江】It is uncertain ______ side effect the medicinewill bring about, although about two thousand patients have taken it.A. thatB. whatC. howD. whether2.【2012全国新课标】It is by no means clear ______ thepresident can do to end the strike.A. howB. whichC. thatD. what3.【2012山东】It doesn’t matter ______ you pay by cash orcredit card in this store.A. howB. whetherC. whatD. why4.【2013陕西】It remains to be seen ______ the newlyformed committee’s policy can be put into practice.A. thatB. whichC. whatD. whether5.【2009天津】It is obvious to the students ______ theyshould get well prepared for their future.A. asB. whichC. whetherD. that6.【2012江西】It suddenly occurred to him ______ he had lefthis keys in the office.A. whetherB. 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。
高中英语名词性从句引导词辨析练习题30题含答案解析1._____ makes this school special is its excellent teaching staff.A.WhatB.WhyC.WhereD.When答案解析：A。
“What makes this school special”中“what”在主语从句中充当主语，表示“使这所学校特别的东西”。
B 选项“why”表示原因；C 选项“where”表示地点；D 选项“when”表示时间，在这个语境中都不符合。
2.I don't know _____ he will come or not.A.thatB.whetherC.ifD.when答案解析：B。
“whether...or not”是固定搭配，在宾语从句中表示“是否”。
A 选项“that”在宾语从句中无实际意义，只起连接作用；C 选项“if”也表示“是否”，但不能与“or not”连用；D 选项“when”表示时间。
3._____ he said at the meeting surprised us all.A.WhatB.ThatC.WhenD.Where答案解析：A。
“What he said at the meeting”中“what”在主语从句中充当宾语，表示“他在会议上说的话”。
B 选项“that”在主语从句中无实际意义，只起连接作用；C 选项“when”表示时间；D 选项“where”表示地点，在这个语境中都不符合。
4.Can you tell me _____ you will go on vacation this summer?A.thatB.ifC.whereD.when答案解析：C。
根据语境，“你能告诉我今年夏天你将去哪里度假吗？”“where”在宾语从句中表示地点。
A 选项“that”在宾语从句中无实际意义，只起连接作用；B 选项“if”表示“是否”；D 选项“when”表示时间，在这个语境中都不符合。
高中英语讲义---- 名词性从句（主从、表从、宾从.同从）1，陈述句做名从用连词that + SV, that 表主句肯定从句完整.不做成分。
主从可用it 做形式主语.宾从第一个that 可省略。
You study hard.主从：That you study hard is known to us.= It is known to us that you study hard.表从：My opinion is that you study hard .宾从：I think (that) you study hard. …and that (不能省略)….同从：My opinion that you study hard is known to us. *比较同从和主从！●一般抽象名词后对其进行解释和说明的完整句子就是其同位语从句.不完整就是定语从句。
I appreciate your idea that we have an exam every week. （that后完整—同从）I appreciate your idea that you came up with last time.（that后不完整---定从）2，一般问句做名从用连词whether(是否) + SV.whether表主句不肯定从句完整.宾从中可用if（介词后或宾从后有or not时只用whether）。
Does your friend like English ?主从：Whether your friend likes English isn’t clear .=It isn’t clear whether your friend likes English.表从：My question is whether your friend likes English.宾从： I don’t know whether/ if your friend likes English.同从：My question whether your friend likes English isn’t clear.3, 特殊问句做名从用疑问词（连词）+ SV, 疑问词做主语时直接+谓语。
高中语法名词性从句讲解和练习有答案高中英语语法之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，名词性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。
一、引导名词性从句的连接词引导名词性从句的连接词可分为三类：连词：that（无任何词意）whether,if（均表示“是否”表明从句内容的不确定性）as if ,as though （均表示“好像”，“似乎”）以上在从句中均不充当任何成分连接代词：what, whatever, who, whoever, whom,whose, whichever,whomever连接副词：when, where, how, why,how many,how much,how often不可省略的连词：1. 介词后的连词2. 引导主语从句和同位语从句的连词不可省略。
That she was chosen made us very happy. We heard the news that our team had won.比较：whether与if 均为"是否"的意思。
但在下列情况下，只可用whether：1. whether引导主语从句并在句首2. 引导表语从句3. whether从句作介词宾语4. 从句后有"or not"Whether he will come is not clear.大部分连接词引导的主语从句都可以置于句末，用it充当形式主语。
It is not important who will go. It is still unknown which team will win the match.二. 主语从句1、作句子主语的从句叫主语从句。
主语从句通常由从属连词that，whether，if和连接代词what，who，which，whatever，whoever 以及连接副词how，when，where，why等词引导。
名词性从句专项练习及答案解析名词性从句是指在句子中充当名词的从句，可以作主语、宾语、表语、同位语等。
在英语语法中，名词性从句是我们必须掌握的一种重要的句子结构。
本文将给出一些名词性从句的练习题，并提供详细的答案解析。
练习题1.请选出正确的名词性从句的句子。
A)John told me that he is going to the party.B)I wonder why he didn’t come to the meeting.C)What she said that she would do it.D)My question is how long will it take to finish the project.2.请选择合适的句子来作为名词性从句的宾语。
A)I don’t know.B)She asked.C)He told me.D)They wonder.3.下列句子中，哪一个是名词性从句的表语？A)The fact is that she is a good singer.B)I don’t know what she said.C)He asked me to do it.D)This is what I want.4.请选出含有名词性从句的句子。
A)He likes playing basketball and he is good at it.B)I am not sure whether I can join the party.C)The girl, who is sitting over there, is my cousin.D)They don’t know if we are coming or not.答案解析1.正确答案是B。
这个句子的名词性从句。
名词性从句讲解在复合句中起名词作用的从句叫做名词性从句。
它包括主语从句、宾语从句、表语从句和同位语从句。
名词性从句是中学阶段的一个重要语法项目，在历年的高考中几乎都涉及到，并且每年的命题各有变化。
分析历届高考试题名词性从句考查的焦点主要有以下六个方面1. 考查名词性从句的语序问题2. 考查引导词that 与what 的区别3. 考查it 在名词性从句中作形式主语或形式宾语的用法4. 考查whether 与if 的区别5. 考查名词性从句中的疑问词+ever 引导的名词性从句与no matter+疑问词引导的状语从句的区别6. 考查名词性从句的虚拟语气问题语法要点剖析一、名词性从句主语从句、表语从句、宾语从句、同位语从句，在整个句子中所起的作用，相当于一个名词。
因此，这四种从句通称为名词性从句。
引导名词性从句的连接词可分为三类：连接词：that, whether, if （不充当从句的任何成分）连接代词：what, whatever, who, whoever, whom, whose, which.连接副词：when, where, how, why1.主语从句作句子主语的从句叫主语从句。
主语从句通常由从属连词that，whether，if 和连接代词what，who，which，whatever，whoever 以及连接副词how，when，where，why 等词引导。
that 在句中无词义，只起连接作用；连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用，在从句中充当从句的成分。
例如：What he wants to tell us is not clear. 他要跟我们说什么，还不清楚。
It 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。
Where the English evening will be held has not yet been announced.英语晚会将在哪里举行，还没有宣布。
高考总复习之名词性从句精讲精练(含习题包含答案)【教学目标】通过课堂讲解，掌握名词性从句的重点考点。
【教学重点】主语从句、宾语从句、表语从句、同位语从句的重点考点。
【教学难点】灵活运用四类名词性从句。
【进门得分】l.There is a feeling in me _that we’ll never know what a UFO is.2.I think, though I could be mistaken, — he liked me.【that】3.At the meeting, we discussed we should employ more workers. [whether]4.After seemed like hours he came out with a bitter smile. [what] 【教学内容】高考英语名词性从句详解考点分析:易错点引导词what与that的区别；引导词whether和if的区别；名词性从句的语序；who / whoever, what / whatever等的区别；where, when, why等连接副词引导的名词性从句; “介词+ who (m) ”引导的宾语从句与“介词+who (m) ”引导的宾语从句的区别；名词性从句中有插入成分时；引导词that的省略；同位语从句引导词where, when的用法特点一、引导词what与that的区别引导主、宾、表语从句时，what要充当主语、宾语或表语等句子成分，that不作任何成分，而只在语法上起连接作用。
例如：we can,t get seems better than we have.A. What；whatB. What；thatC. That；thatD. That；what注意：在下面的例句中，that不充当任何成分，只起语法连接作用(因为句子本身不缺成分)：1 / 20高考总复习之名词性从句精讲精练（含习题包含答案）That the former Iraq president Saddam was captured has been proved.二、引导词whether和if的区别通常，引导主语从句、表语从句和同位语从句时，连词要用whether，而不用if ；习惯上也只能说whether or not，而不说if or not .例如：the meeting will be held in Beijing is not known yet.A.WheneverB. IfC. WhetherD. That注意：如果宾语或主语从句为否定句时，只能用that，不能用whether引导。
名词性从句用法详解一、概说名词性从句，即指性质相当于名词的从句，它包括主语从句、宾语从句、表语从句和同位语从句。
从高考的考查的实际情况来看，名词性从句考得最多的是宾语从句，其次是主语从句，再次是表语从句，而同位语从句则很少考查。
引导名词性从句的连接词可分为三类：连接词：that, whether, if （不充当从句的任何成分）连接代词：what, whatever, who, whoever, whom, whose, which.连接副词：when, where, how, why二、名词性从句的一般引导词1. 连接词that 只起连接作用，没有任何意思，也不充当句子成分，在宾语从句中可省略，但引导其他名词性从句时通常不省略。
I hope (that) you enjoy your holiday. 希望你假期过得好。
（宾语从句）That he likes you is very obvious. 很显然他喜欢你。
（主语从句）2. 连接词whether 也不充当句子成分，但有自己的意思，表示“是否”；引导宾语从句时，可换成if，但引导其他名词性从句时不能换成if。
如：He asked whether [if] I would show him the way. 他问我是否可以给他带路。
Whether it will do us harm remains to be seen. 是否对我们有害还要看一看。
(引导主语从句，不能用if 代替whether)3. 连接代词who(m), whose, which, what 等，均有各自的意义，在从句中作主语、宾语、定语等。
如：That’s what she wanted to do. （表语从句）Who will help us is not known. （主语从句）Tell me which one you like best. （宾语从句）4. 连接副词when, where, why, how 等，也各自有自己的意义，在从句中作状语。
名词性从句用法讲解与专项练习题及答案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 come.②I have a question whether he will come③I have a question when he will come.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 come.I don’t know whether/if he will come.I don’t know when he will come.表语从句：What I don’t know is that he will come.What I don’t know is whether he will come.What I don’t know is when he will come.主语从句That he will come is obvious.Whether he will come isn’t known yet.When he will come isn’t known yet.1.【2010浙江】It is uncertain ______ side effect the medicinewill bring about, although about two thousand patients have taken it.A. thatB. whatC. howD. whether2.【2012全国新课标】It is by no means clear ______ thepresident can do to end the strike.A. howB. whichC. thatD. what3.【2012山东】It doesn’t matter ______ you pay by cash orcredit card in this store.A. howB. whetherC. whatD. why 4.【2013陕西】It remains to be seen ______ the newlyformed committee’s policy can be put into practice.A. thatB. whichC. whatD. whether5.【2009天津】It is obvious to the students ______ theyshould get well prepared for their future.A. asB. whichC. whetherD. that6.【2012江西】It suddenly occurred to him ______ he had lefthis keys in the office.A. whetherB. 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。
That they are good at English is known to us all.The problem is that we don’t have enough money.She expressed her hope that they would come to China one day.只有宾语从句中的连接词that可省略，但在以下几种情况中that也不能省略：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。
He judged that, because he was a child, he did not understand.B.当两个名词性从句并列作宾语时，后面的that不能省。
Everyone knew what happened and that she was worried.C.当that作介词宾语时，that不可省掉。
The reason lies in that she works harder than the others do.7.______ we need more practice is quite clear.A. WhenB. WhatC. ThatD. /8.______ fashion differs from country to country may reflectthe cultural differences from one aspect.A. WhatB. ThatC. ThisD. Which9.【2010上海】One reason for her preference for city life is______ she can have easy access to places like shops and restaurants.A. thatB. howC. whatD. why10.The reason why I didn’t go to Shanghai was ______ a newjob.A. because I gotB. because of gettingC. I gotD. that I got11.【2011全国I】The next thing he saw was smoke ______from behind the house.A. roseB. risingC. to riseD. risen12.Having checked the doors were closed, and ______ all thelights were off, the boy opened the door to his bedroom.A. whyB. thatC. whenD. where13.I know nothing about the young lady—______ she is fromBeijing.A. exceptB. except forC. except thatD. besides14.Human beings are different from animals ___ they can uselanguage as a tool to communicate.A. for thatB. in thatC. in whichD. for which(如果不理解本题，可以参看P. 错误!未定义书签。
错误!未找到引用源。
)考点3.whether 与if引导名词性从句时的区别A.在主语从句、表语从句、同位语从句中只能用whether,不能用if。
Whether the meeting will be put off has not been decided yet.The question is whether they have so much money.We ought to discuss carefully the question whether we can do it or not.B.在宾语从句中whether和if可以互换，但：i.作介词宾语时连接词一般用whether。
如：It all depends on whether they will come back.ii.后面直接跟or not 时用whether。
如：I didn’t know whether or not he had arrived in Wuhan.C.whether也可与动词不定式连用，但if不能。
I have not decided whether to go or not.D.whether常与or连用表示一种选择，if不能这样用：The question of whether they are male or female is not important.E.whether可引导一个让步状语从句表示“不管”、“无论”，而if不能。
如：Whether he comes or not, we will begin our party on time.F.discuss后通常用whether。
15.______ you can succeed in the end will mainly depend on______ you do and ______ you do it.A. If; what; whyB. Whether; what; howC. Whether; how; whyD. That; whether; how16.【2009上海】It is not immediately clear ______ thefinancial crisis will soon be over.A. sinceB. whatC. whenD. whether17.They discussed ______ they could settle the problemwithout others’ help.A. ifB. thatC. whatD. whether18.What the doctor is uncertain about is ______ my mother willrecover from the serious disease soon.A. whenB. howC. whetherD. why19.Mr. Hopkins has not yet answered my question ______ I cango with him to ______ he calls the Underground Treasure House next week.A. that; whichB. that; whereC. whether; thatD. whether; what20.I have no idea ______ or not he has finished the work.A. ifB. thatC. whetherD. which 考点4.question 与doubt 后跟同位语从句时的连接词问题doubt，question用于肯定结构时，后面用whether引导名词性从句；用于否定结构或疑问结构时，后面用that引导名词性从句。
