名词性从句(整理完整版)
名词性从句
一、定义：名词性从句在功能上相当于名词，是一个句子分别充当另一个句子的主语、
表语、宾语和同位语，由此被称为主语从句，表语从句，宾语从句和同位语从句。
辨别下列从句属于哪种名词性从句并分析：
1）Why they haven’t left yet is unclear.
2）It was good news that everyone got back safely.
3）Polly didn’t know which way she should go.
4）I’m interested in who that tall man is.
5）We all thought it good news that the fog had finally gone.
6）My question is whether Polly can find her way home.
7）The fact that Polly didn’t ask for the man’s name is a pity.
总结：名词性从句主要由陈述句、一般疑问句、特殊疑问句充当。
1）陈述句充当名词性从句时，由that引导；2）一般疑问句充当名词性从句时，由if或whether 引导从句；3）特殊疑问句充当名词性从句时，由疑问词本身做连词引导从句。4）名词性从句的语序应使用陈述句语序，不可用一般问句语序。
二、引导名词性从句的从属连词及从句语序
1.连接词that；功能1）不充当句子成分2）无词义3）只起连接作用。
2.if/whether;功能：1）意为“是否”，有词义2）不做句子成分3）起连接作用
翻译:
1）I know that he will come this evening.___________________________________________
2) Whether we will go there or not hasn’t been decided yet.______________________________
3.连接代词：what(ever), which(ever), who(ever), whom(ever), whose(ver)
功能：1）有词义2）引起从句3）且在从句中充当一定的句子成分，常做从句中的主语、宾
语、表语和定语。
找出下列主从句的名词性从句，并确定从属连词在从句中的句子成分：
1）What he said isn’t true.
2) There are so many books that I don’t know which one I should choose.
3) The question is who will come to help us.
4.连接副词when(ever), where(ver), why, how(ever)以及how(ever)+adj./adv.组成的词组引导的名词性从句。
功能：1）连接主从句2）有词义3）在从句中作句子成分，可作从句中的时间状语、地点状
语、原因状语、方式状语或表程度，如：how(ever)+adj./adv.等。
找出下列主从句的名词性从句，并确定从属连词在从句中的句子成分：
1) I wonder how he managed to finish the work in such a short time.
2) Where we will stay during our visit to Australia hasn’t been announced.
3) He can’t answer the question how he got the money.
4) The question is when we can get there.
5.名词性从句的语序应使用陈述句语序，而不可用一般问句语序，其结构为：从属连词
（that/whether/if/wh-疑问词）+陈述句语序。
三、名词性从句分类讲解
Ⅰ.主语从句
1.主语从句在复合句中作主语，其主句的谓语动词用单数。
填空并翻译：
(完整版)名词性从句高考题语法填空
名词性从句高考题语法填空 1. （2014北京卷）30. The best moment for the football star was _______ he scored the winning goal. 2. I am afraid he’s more of a talker than a doer, which is ______ he never finishes anything. 3. （2014大纲卷）2 4. Exactly ____ the potato was introduced into Europe is uncertain, but it was probably around 156 5. 4. It suddenly occurred to him he had left his keys in the office. 5. （2014福建卷）34. Pick yourself up. Courage is doing you're afraid to do. 6. He thought mattered most in improving your spoken English was enough confidence and practice. 7. （2014湖南卷）24. As John Lennon once said，life is_____ happens to you while you are busy making other plans. 8. _____ is known to us all is that the 2010 Asian Games will take place in Guangzhou. 9.2014山东卷）7. It is difficult for us to imagine_____ life was like for slaves in the ancient world. 10. The shocking news mad me realize ________ terrible problems we would face. 11.（2014四川卷）2. Grandma pointed to the hospital and said, "That's ______ I was born." 12. —I prefer shutting myself in and listening to music all day on Sundays. —That’s_______I don’t agree. You should have a more active life. 14. （2014浙江卷）8. “Every time you eat a sweet, drink green tea.” This is _____ my mother used to tell me. 15. People have heard what the president has said; they are waiting to see ____ he will do. 16. （2014重庆卷）12.—Is it true that Mike refused an offer from Yale University yesterday? —Yeah, but I have no idea ____ he did it; that’s one of his favorite universities. A. when B. Why C. that D. how 1. (2013·北京卷·T31)makes the book so extraordinary is the creative imagination of the writer. 2.(2013·山东卷·T30)It’s good to know the dogs will be well cared for while we’re away. 3.(2013·浙江卷·T16)The only way to succeed at the highest level is to have total belief you are better than anyone else on the sports field. 4.(2013·四川卷·T6)you said at the meeting describes a bright future for the company. 5.(2013·重庆卷·T28)struck me most in the movie was the father’s deep love for his son. 6.(2013·天津卷·T15)I want to tell you is the deep love and respect I have for my parents. 7.(2013·北京卷·T33)Experts believe people can waste less food by shopping only when it is necessary.
2020届高三精准培优专练六 名词性从句(教师版)
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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。 e.g. He told me (that) they could not decide what to do and that they asked my advice. 2. whether和if引导宾语从句一般可以互换使用，但以下情况只能使用whether
名词性从句测试题及答案经典
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(完整版)名词性从句讲解及专项练习习题及其解答
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, why 1. 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。常用句型如下： （1）It + be + 名词+ that从句（2）It + be + 形容词+ that从句 （3）It + be + 动词的过去分词+ that从句（4）It + 不及物动词+ that 从句 另注意在主语从句中用来表示惊奇、不相信、惋惜、理应如此等语气时，谓语动词要用虚拟语气“(should) +do”，常用的句型有： It is necessary (important, natural, strange, etc.) that … It is a pity (a shame, no wonder, etc.) that… It is suggested (requested, proposed, desired, etc.) that… 2. 宾语从句 名词句用作宾语的从句叫宾语从句。引导宾语从句的关联词与引导主语从句表语从句的关联词大致一样，在句中可以作谓语动词或介词及非谓语动词的宾语。 1. 由连接词that引导的宾语从句 由连接词that引导宾语从句时，that在句中不担任任何成分，在口语或非正式的文体中常被省去，但如从句是并列句时,第二个分句前的that不可省。例如： He has told me that he will go to Shanghai tomorrow. 他已经告诉我他明天要去上海。 We must never think (that) we are good in everything while others are good in nothing. 我们决不能认为自己什么都好，别人什么都不好。 注意：在demand、order、suggest、decide、insist, desire, demand, request, command等表示要求、命令、建议、决定等意义的动词后，宾语从句常用“（should）+ 动词原形”。例如： I insist that she (should) do her work alone. 我坚持要她自己工作。 The commander ordered that troops (should) set off at once. 司令员命令部队马上出发。 2. 用who，whom, which, whose, what, when, where, why, how, whoever, whatever, whichever等关联词引导的宾语从句相当于特殊疑问句，应注意句子语序要用陈述语序。 例如：I want to know what he has told you. 我想知道他告诉了你什么。 She always thinks of how she can work well. 她总是在想怎样能把工作做好。
名词性从句(教师版)
名词性从句 一、定义 名词性从句，其用法相当于一个名词的用法，在句中可作主语、宾语、表语、同位语，分别叫做主语从句、宾语从句、表语从句、同位语从句。 二、引导名词性从句的连接词 1. 连接代词：既起连接作用，本身又做从句中的主语、宾语、表语或定语：who、whoever、whom、whomever、whose、whosever、which、whichever、what、whatever。 2. 连接副词：既起连接作用，本身又做从句的状语：when、where、why、how。 3. 从属连词：只起连接作用，不充当从句中的任何成分：that、whether、if、as if/though等。【温馨提示】根据句义，如果连接代词与连接副词，whether，if和as if都用不上时，才用that做连接词。 【练习一】在空格处填入适当的连接词，然后指出每句分别属于哪种名词性从句。 1. The truth that the earth turns around the sun is known to all. 同位语从句 2. I am very interested in how he has improved his pronunciation in such a short time. 宾语从句 3. What we need is more time. 主语从句 4. Please tell me who/whom you are waiting for. 宾语从句 5. No one knew whose dictionary that was. 宾语从句 6. Do you know which is longer, the Changjiang River or the Mississippi? 宾语从句 7. Whether he will come or not is not yet known. 主语从句 8. Whoever breaks the law will be punished. 主语从句 9. My question is who will take over president of the Foundation. 表语从句 10. The reason why he didn’t come this morning was that it was raining heavily. 表语从句 三、名词性从句中需要注意的几大问题 ●当主语时态为一般过去式时，宾语从句的时态通常要与主句保持一致，但如果从句表示的是真理或客观现象，则仍用一般现在时。 1. 我告诉他我马上回来。 I told him (that) I would come back soon. 2. 他说他已经读完这部小说。 He said (that) he had finished reading this novel. 3. 老师说光比声传播快。 The teacher said (that) light travels faster than sound. ●that引导宾语从句时，很多情况下都可省略，不可省去的情况有： ﹡动词后有两个或两个以上的宾语从句时，紧跟动词后的宾语从句可以省去that，其余的宾语从句前的that不能省去。 4. 他说展览会很好，他想再去参观一次。 He said (that) the exhibition was excellent and that he wanted to visit it once more. ﹡谓语和宾语从句之间有插入语时，宾语从句前的that不能省去。 5. 就在那时，我第一次注意到我们的老板穿着他那件漂亮的绿外套。 Just then I noticed, for the first time, that our boss was wearing his beautiful green coat. ﹡宾语从句紧跟在间接宾语后时，that不能省去 6. 老师建议我们要重视读和写。 The teacher advised us that we should pay attention to reading and writing. ﹡it作形式宾语时，宾补之后引导宾语从句的that不能省去。
英语名词性从句知识归纳
英语名词性从句知识归纳 Prepared on 22 November 2020
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。 . 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. 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)
(完整版)高考英语【名词性从句】
专题十名词性从句 第一节基本知识与基本概念 【什么是名词性从句？】 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. 【宾语从句】 在句子中作宾语的从句就是宾语从句。由于这是同学们接触比较早的一种从句，应该问题不大。所以在近年的高考题中，以宾语从句的知识作为考点的题目较少。但是，宾语从句也有自己的特殊情况，如介词的宾语，形容词的宾语，宾语从句提前和并列的宾语从句等现象。如： We assumed that there would be more than 100 guests. He told the police in detail what he saw and heard. Nobody is sure what humans will look like in a million years. That will depend on whether they can get the chance. Whether I will have the time I am not sure at the moment. The conductor complained that we were not gifted in singing and that he would never come again. 【表语从句】 表语从句的最重要脸谱就是它们应该出现在系动词的后面。如： The only question left is how often the workers are paid. His idea for the coming weekend is that we go skating. 【同位语从句】 从脸谱上看，同位语从句最为麻烦。因为它们也是出现在一个名词的后面，起着解释说明的作用。
(完整版)初中英语名词性从句练习题(含答案)
名词性从句 01.I want to know is it is worth doing. A.What; that B. What; whether C. That; why D. That; what 02.visits the Great Wall will be struck by it. A.Anyone B. Each C. Whoever D. Everybody 03.the workers insisted on was that they more pay. A.That; must be given B. What; should give C. Whether; would be given D. What; be given 04.She asked . A.what I was doing when she rang me up B. What was I doing when she rang me up C. When she rang me up what was I doing D. When did she ring me up what I was doing 05.Writing stories and articles I enjoy most. A.is that B. are that C. is what D. have been what 06.He asked the tailor . A.how long would the coat be ready B. how soon would the coat be ready C. how long the coat would be ready D. how soon the coat would be ready 07.The policeman came up to see . A.what the matter is B. what the matter was C. what was the matter D. what is the matter 08.he told us is a . A.That; lay B. Which; true C. What; lie D. Whose; truth 09.It was not until the headmaster came . A.and so the students got down to work B. did the students get down to work C. that the students got down to work D. then the students got down to work 10.I wonder this kind of metal can be used in the construction industry. A.how B. what C. about D. which 11.--- you did? --- No, as a matter of fact I didn’t need to. A.Is that what B. Is what that C. What is that D. Is that which 12.She is pleased with you have given her and all you have told. A.that; that B. what; which C. what; that D. all; what 13.They expressed the hope they would come over to visit China again. A.which B. that C. whether D. for which 14.I wanted to say. A.Such was what B. What was such C. Such was that D. That was such
(完整版)中考英语名词性从句讲解+练习(教师版)
中考—名词性从句 主语从句 主语从句的语序 主语从句要求使用陈述句语序，而非一般疑问句语序。如： What surprised me most was that the little girl could play the violin so well. 使我感到惊讶的是这个小女孩的小提琴拉得太好了。 连接词的选用 （1）that和what的选用 that和what都可引导主语从句。what除起连接作用外，还在名词性从句中充当某些成分，可作从句的主语、宾语或表语。而that在名词性从句中不充当任何成分，无词义，只起连接词作用。如： What he wants is a book. 他想要的是一本书。 That light travels in straight lines is known to all. 众所周知，光线沿直线运行。（2）if和whether的选用 引导主语从句，不能用if，只能用whether。如： Whether we will hold a party in the open air tomorrow depends on the weather. 我们明天是否在户外开晚会要看天气而定。 （3）其它连接代词和副词的选用 根据主语从句的具体意义，正确的选择who, which, when, where, why, how等连接词，这些连接词既有疑问含义，又起连接作用，同时在从句中充当各种成分。如： When we shall hold our sports meet is not decided. 我们何时举行运动会还没有决定。 Who broke the glass yesterday is not clear. 还不清楚昨天谁打破了玻璃。 Which car you will choose to buy makes no difference. 你决定买哪一辆车都不会有任何区别。 （4）whatever / whoever的功用 whatever, whoever在主语从句中不含疑问意义。它引导主语从句，并在从句中作主语、宾语、表语等。whatever = anything that; whoever = anyone who。要注意和whatever, whoever引导的让步状语从句的区别。如： Whoever breaks the law should be punished. （主语从句）（＝Anyone who breaks the law should be punished. ） Whoever breaks the law, he should be punished. （让步状语从句）（＝No matter who breaks the law, he should be punished. ） it构成的主语从句 （1）由连词that引导的主语从句，在大多数情况下会放到句子的后面，而用代词it作形式主语。谓语是seem, appear, be certain, be a pity, be a wonder, be one's hope, be likely等词或短语时。 It is well-known that the earth moves around the sun. 众所周知，地球围绕太阳转。 需要注意的是，it作形式主语代替主语从句时，要注意和as引导的定语从句的区别。试比较：
word完整版高中英语名词性从句专项练习
名词性从句专项复习 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, why, wh- ever 名词性从句连接词的选用 一、that 和what的选用： that 和what都可引导所有的名词从句。但是，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。而that在名词性从句中不充当任何成分，只起连接作用。 二、if 和whether 的选用 不能使用if 的情况： a. 主语从句句首 b. 表语从句，同位语从句 c. if引起歧义 d. 介词后的宾语从句 e. 与to do连用 f .whether or not 连在一起引导宾语从句时不用if 三、其它连接代词和副词的连用 主要根据名词性从句中的具体意义,正确的选择who、which、when、where、why、how 等连接词，这些连接词既具有疑问含义，又起连接作用，同时在从句中充当各种成分。 四、引导词that 的省略 that 可省略的情况：单个宾语从句中的that可省略 that不可省略的情况：a.主语从句b.表语从句c.同位语从句d.用it做形式宾语的宾语从句e.并列的宾语从句中，后几个从句的引导词that 不能省略 五、同位语从句的引导和辨别 1.同位语从句的格式：n.+ 连接词+ 从句 2.能接同位语从句的名词有：fact、idea, news, information, order, belief, suggestion, advice等. 3.连接词通常是that,也可根据含义选用whether, what, when, where 等来引导同位语从句. 4.中心词是“意见、建议、命令”从句要用虚拟（should）do 六、同位语从句和定语从句的区别 1.定语从句是先行词的修饰语。从句中that充当成分，做宾语时可省略。 2.同位语从句表明中心词的具体内容。that 在同位语从句中不做任何成分,只起连接作用,无具体含义,且不可省略. 判断从句类型 七、宾语从句的时态呼应 1. 如果主句时态是现在时或将来时,从句谓语可根据句意需要而选用任一种时态. 2. 如果主句时态是过去式，从句要改成相应的过去式 八、it做形式主语 常用句型如下：（1）It + be + 名词+ that从句（2）It + be + 形容词+ that从句 （3）It + be + 动词的过去分词+ that从句（4）It + 不及物动词+ that 从句 名词性从句专项练习
(教师用)高中名词性从句讲解
专题7 ：名词性从句 一、概念 在句子中起名词作用的句子叫名词性从句。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、介词宾语等, 因此可分别称为主语从句、宾语从句、表语从句和同位语从句。主要考查语序问题、连接词选用、时态的呼应等 Who will win the match is still unknown. I want to know what he has told you. The fact is that we have lost the game. The news that we won the game is exciting. 2. 引导名词性从句的连接词可分为三类: 从属连词：that, whether, if 不充当从句的任何成分 连接代词: what, whatever, who, whoever, whom, whose, which, whichever. （作主、宾、表、补） 连接副词: when, where, how, why, however, wherever（状） 主语从句的用法 一、主语从句在复合句中作主语, 它可以位于句首, 但常见的主语从句多放在句末,句首则用形式主语it。 1．That the earth is round is true. = It is true that the earth is round 2. Whether he will come hasn’t been decided. = It hasn’t been decided whether he will come. 注意: 连词that, whether在从句中不担任句子成分,只起连接作用,不能省略(注: if不可用来引导主语从句） When he will go to America is not yet fixed. (It is not yet fixed when he will go to America.) Whoever leaves the room last should close the door. Whatever we do must be in the interests of the people. 3.常见的it作形式主语的结构
名词性从句知识点总结
名词性从句 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。因此，名词性从句厅分为主语从句、表语从句、宾语从句和同位从句。 （一）引导名词性从句的连接词 1、连接代词：who, whose, whom, what, which。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：when, where, why, how。有词义，在从句中担任成分，作状语。 3、连接词：that, whether, if, as if。that 无词义，在从句中不担任成分，有时可省略；if (whether), as if虽有词义，但在从句中不担任成分。 注意： 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whether 和if（是否），as if（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，whether、if 和as if都用不上时，才用that作连接词（that本身无任何含义）。 2、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. （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. 主要句型有： （1）It+be+形容词+that从句。 It is probable that he told her everything. 很可能他把一切都告诉她了。 （2）It+be+名词词组(no wonder, an honour, a good thing, a pity, no surprise, etc.)+that从句。It’s no surprise that our team should have won the game. 我们没赢这场比赛真意外。 （3）It+be+过去分词+that从句。 It is said that Mr. Green has arrived in Beijing. 据说格林先生已经到了北京。 （4）It+seem, happen等不及物动词及短语+that从句。 It seems that Alice is not coming to the party at all. Alice似乎不来参加晚会。 （5）It+doesn’t matter (makes no difference, etc.)+连接代词或连接副词引起的主语从句。 It doesn’t matter whether she will come or not. 她是否来这无关紧要。 It makes no difference where we shall have the meeting. 我们在哪里开会毫无区别。 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. 4、当主语从句作主语时，谓语动词一般用第三人称单数，下面这个句型例外。 What we need is more time and money. What we need are many more books. 5、if不能用在主语从句中，而是用whether Whether he left (or not) is unknown 6、引导主语从句的关联词有三类： (1)从属连词that。