主语从句+表语从句+同位语从句
高二英语名词性从句
Virtue is whatever one must possess first. 品德应是一个人必须首先具备的。
The difficulty was how he could prove his ideas to other scientists. 困难在于他怎样才 能向其他科学家证实他的想法。
当that从句与另一名词性从句并列做宾语时， that不能省略。 Everyone could see what was happening and that she was really worried. 大家都看得 出发生了什么事，也知道她真得十分焦急。
重点：句中若有两个并列的that 从句做宾语， 即使省略了第一个that，也不可以省略第二 个that。 Eg. I believe (that) you’ve done your best and that things will improve. 我想你已经尽 力了，我相信一切会好起来的。
“ Where has my mother gone?” he wondered. ----He wondered where his mother had gone.
2) 由how和what 引导的感叹句做宾语从句 时，仍然用感叹句的语序。 “How important the forest is!”
She wanted to see which shops offered the best advice and service. 她想了解哪家酒店提出的建议和提供的服务最好。 Go to stamp sales and buy whatever you can afford. 到邮票销售点，把你能够买得起的邮票买下来。 Take whichever you like best. 挑选你最喜欢的随便拿一个。 We will see what we can discover. 我们倒要看看会发现什么情况。 Do you know where he lives? I don’t quite understand why more women smoke than men in Britain.
名词性从句—— 主语从句、宾语从句、表语从句、同位语从句档
主语从句
一、 that从句做主语
1、that不能省略，常用it做形式主语
That the thief has entered his room is obvious.
=It is obvious that the thief has entered the room.
2、宾语从句中，当主句谓语动词是一般过去时，从句谓语动词要用与过去相关的时态
She asked me where I was going.
I wondered how he could make such rapid progress in French.
注意：若从句表达的是客观真理，仍用一般现在时
It is said that they have won the game.
常用过去分词：said, believed, reported, hoped, claimed, known, announced, suggested
此句型可转换成另一结构：
主语 + be + 过去分词 + to do / to have done
= He is said to go to America.
4) It + vi. +that从句
It seems that something is wrong with the machine.
常用vi：happen, appear, seem, turn out
二、 wh-从句做主语
I would have drowned，but that you had saved me in the water.
高中英语2024届高考名词性从句知识分类讲解(主语从句+宾语从句+表语从句+同位语从句)
高考英语名词性从句知识讲解名词性从句是指在复合句中起名词作用的句子，功能相当于名词词组。
名词性从句在复合句中能作主语、宾语、表语、同位语等，根据在句中的语法功能可分为主语从句、宾语从句、表语从句和同位语从句。
一、主语从句【定义】在复合句中，作主语的句子称为主语从句。
常见的连接词：（连接词在句中不能省略）that, whether, who, what, whatever, whoever, where, when, why, how等。
【用法】1.连接词 that 引导That we should learn English well is very important.主语从句中 we should learn English well句子完整，不缺成分，用that引导，that 不能省连接词whether，if 引导whether 引导的主语从句可放句首，也可放句中，表“是否”if 引导的主语从句只能引导动词后的宾语Whether I will go or not depend on the weather.It remains to be seen whether / if they can finish the task in time.2.连接代词what, who, which, whose, whatever, whichever，whoever等引导What matters most is your attitude.3.连接副词when，where，why，how等引导How he made it is still unknown.4.it作形式主语为了避免句子头重脚轻，通常把形式主语it放在句首，真正的主语放在句子后面。
常见句型：(1) It is + n.+ that + 句子It is +（a pity / a shame / a fact …）+ that ...(2) It is + adj.+ that + 句子It is +（true / clear / important …）+ that ...(3) It is + 过去分词 + that + 句子It is+ said / announced / expected / believed / hoped… + that ...(4) It seems /appears / happens / turned out that + 句子(5) It hit sb./occurred to sb.that + 句子二、宾语从句【定义】在复合句中，作宾语的句子称为宾语从句。
名词性从句之主语,同位语,表语
名词性从句之主语从句，同位语从句，表语从句1.主语从句介绍：When we will finish the work is still a problem.=It’s still a problem when we will finish?Whether she will come or not makes no difference= it makes no difference whether (if) she will come or not.That he survived the accident is a miracle= it is a miracle that he survived in the accident.Note: 形式主语it 引入：It is too difficult for me to understand the sentenceIt is too easy to solve the problemIt’s funny to play basketball.It 可引导的主语从句1.it +名词+从句it is a fact that he didn’t pass the exam.2.It+形容词+从句It is strange that he failed to pass the exam3.It+不及物动词+从句It seems that he likes eating bananas.4.It+过去分词+从句It is said that he has passed the exam5.其它It doesn’t matter if you don’t pass the exam.2.表语从句介绍1表语介绍The book is on the desk (prep)You looks beautiful (adj)This is a book (n)2.表语从句介绍It seems that it is going to rainThis is how Jane lives.The reason of his not coming is that he was ill.The problem is whether you love her.3.同位语从句介绍1.同位语介绍We both have black hair and black eyes.This is a photo of me and my twin sister LiuYing2.同位语从句介绍定义：同位于从句用于对名词作进一步解释，说明名词的具体内容。
从句
4）This is the fastest train that there is to Beijing.
5） 当先行词被all, no, any, a few, the only, the very等修饰时 This is the very dictionary that is of great help. 6）It is the most interesting film that I have ever seen. The first English novel that I read was A Tale of Two Cities.
3. Shopping for clothes is not the same experience for a man is for a woman. A. when B. that C. as √ D. than 4. Is there anything else this evening? A. which B. who you want to get ready for the party
2）主语从句常见句型
① It is + adj. / 过去分词 + that… ② It happens/occurs that… ③ It must be pointed out that…
④ It’s a good thing that…
2、宾语从句
that, whether who, what, which, when, where, how, why
3、表语从句
that, whether who, what, which, when, where, how, why
The truth is that he has never been abroad. The doctor’s dilemma is whether he should tell a lie to the patient. China is not what it used to be.
主语从句宾语从句表语从句同位语从句名词性从句讲解
பைடு நூலகம்
二、同位语从句与定语从句的不同之处
1、含义不同：同位语从句是对前面名词的解释说明，知道具体 内容，指同一件事（可以划等号）；定语从句用来修饰、限定前 面的名词，不知道具体内容。
e.g. The news that our team has won the final match is encouraging. （从句说明“消息”的内容：我们
3) 复合句 主句+引导词+从句
请判断下列句子是简单句、并列句还是复合句：
1.He often reads English in the morning.
简单句
2.You help him and he helps you.
并列句
3.My suggestion is that we should study step by step.
much time online.
B 3.The first request that he made was to ask for freedom.
4. Do you have any idea where we will be sent?
B 5. Is this the company where your father works? B 6. This is the reason that he gave for his absence.
队取得了决赛胜利。）
The news that you told us is really encouraging.
（从句对“消息”加以限定：是你告诉我们的，而非来自其他 渠道。但消息是何内容却不得而知。）
二、同位语从句与定语从句的不同之处
初中英语同位语从句、主语从句及表语从句
同位语从句，主语从句和表语从句一、同位语从句1.同位语：当两个指同一事物的句子成分放在同等位置时，一个句子成分被用来说明或解释另一个句子成分，前者就叫做后者的同位语。
这两个句子成分多由名词或代词担任。
同位语通常放在其说明的名词或代词之后。
eg:We have two children, a boy and a girl.eg:We ,the chinese people , are determinded to build China into a powerful an prosperous country.2.同位语从句：与先行词（名词或代词）同位或等同的从句叫做同位语从句。
同位语从句的先行词多为fact, news, idea, opinion, thought, suggestion, promise, word(消息), message, request, order, proposal, plan, question等，多由连接代词that引导。
eg:The fact that the money has gone doesn’t mean it was stolen.eg:The hope that he may recover is faint.3.同位语从句的引导词及特点：1）连接代词that 引导的同位语从句中，that只起连接作用,不充当句子的成分。
2）连接代词who, which, what和连接副词where, when, why, how引导的同位语从句中，其引导词在句子中起连接作用即将主句与从句连接起来，且要在从句中充当成分。
3）从属连词whether, if引导同位语从句中，whether, if只起连接作用，不在句子中充当成分，也不替代先行词。
注：连接代词与连接副词，关系代词与关系副词的区别如下：连接代词和连接副词是引导同位语从句的，其在句子中起连接作用即将主句与从句连接起来，且要在从句中充当成分（that除外）；关系代词与关系副词是引导定语从句的，其在句子中除了具备与连接代词和连接副词同等的作用外，即起连接作用（连接主从句），在句子中充当成分，而且还要替代先行词。
主语从句_表语从句_同位语从句)
我的问题是他是否离开了
注：if不能引导表语从句
3）wh-疑问句（who/where/how..）当表语从 句为疑问的语气时，用wh-疑问句来引导，要 注意从句语序为陈述语序。 1.My question is who left. 我想问的是谁离开了 2.That’s what he wants. 那是他想要的。 3.This is where they once lived. 这就是他们曾经住过的地方。 4.That is why he didn’t come here. 这就是他为何没到这儿来的原因。
1.Africa is a big continent.
2.The patient is out of danger. 3.The sun is up. 4.The egg smells good. 5.Her job is selling computers. 主语+系动词+表语
exercises
Combine the sentences using “the fact that” Ann was late. That didn’t surprise me. Rosa didn’t come. That made me angry. I am a little tired. I feel fine except for that. Many people live in poverty. That must concern all of us. Lily didn’t pass the entrance examination. She was not admitted to the university due to that .
高考英语语法考点之主语从句、表语从句和同位语从句
高考英语语法考点之主语从句、表语从句和同位语从句高考频度：★★★★★考点详解考向二主语从句1.主语从句在复合句中充当主语，大多数主语从句都可以用it作形式主语而把主语从句置于句尾。
2.that引导主语从句时可用it作形式主语，that不可省；what引导的主语从句表示＂……的东西＂时，一般不用it作形式主语；whatever，whoever，whichever一般也不用it作形式主语。
☞That she will succeed is certain.☞It is certain that she will succeed.常见的it替代that引导的主语从句的句式主要有以下几种：(1)It＋系动词＋形容词(necessary，right，likely，unlikely，wrong，important，certain，clear，obvious，strange，normal等)＋that从句☞It is certain that most of the farmers have brought in more money by all means.(2)It＋be＋名词(短语)(a pity，a shame，good news，a fact，an honour，a wonder，no wonder等)＋that从句It’s no wonder that you’ve achieved so much success.(3)It＋be＋过去分词(said，told，heard，reported，decided，suggested，advised，ordered，remembered，thought，considered，wellknown，announced等)＋that从句☞It is said that the professor has already succeeded in carrying out the experiment.(4)It＋特殊动词(seem，appear，happen，matter)＋that从句☞It happened to me that I had been away when he called.注意：(1)在＂It is necessary/important/strange/natural...＋that从句＂结构中，从句谓语常用＂(should＋)动词原形＂形式。
复合句：主语从句、表语从句、同位语从句
网络课程内部讲义初中英语句法全攻略：名词性从句教师：金春花温馨提示：本讲义为A4大小，如需打印请注意用纸尺寸爱护环境，从我做起，提倡使用电子讲义一、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。
宾语从句：I don’t know what his name is.主语从句：Who will come is still unknown.表语从句：This is what he said.同位语从句：The thought came to me that he wouldn’t come.二、主语从句1.定义：在复合句中充当主语成分的句子叫做主语从句。
2.主语从句的引导词：（1）that：引导词that无含义，在句中不做成分，不可以省。
That he didn’t show up yesterday truly hurt me.（2）whether：引导词whether表示“是否”，在句中不做成分，不可以省。
另外注意：引导主语从句，不能用if，只能用whether。
Whether he will come is still unknown.（3）连接代词：who, whose, whom, which, what, whoever, whomever, whichever, whatever引导的名词性从句中，其连接代词在句中起名词性作用，担当一定成分.What he wants to tell us is not clear.（4）连接副词：when, where, why, how引导的名词性从句，其连接副词有含义,在句中作状语。
Where the party will be held has not been decided yet.3.It作形式主语的主语从句（1）It’s +n.+ that+从句It’s a pity that……（……很遗憾/很可惜）It’s a fact that……（……是一个事实）It’s a surprise that……（……令人惊讶）It’s common knowledge that……（……是常识）（2）It’s +adj. + that+从句It’s possible that……（……是可能的）It’s obvious that……（……是很明显的）It’s unlikely that……（……是不可能的）（3）It+不及物动词+ that+从句It happened that……（碰巧……）It occurred to me that……（我想到……）（4）It +be+ 过去分词+that+从句It’s said that……（据说……）It’s reported that……（据报道……）It’s known to all that……（众所周知……）It is believed that……（人们相信……）It must be pointed out that……（必须指出的是……）三、表语从句1.定义：用作表语的从句叫做表语从句。
从句语法详讲：主语从句、表语从句、状语从句、定语从句、同位语从句
《高中英语语法详细讲解》主语从句（3-5）、同位语从句（5-9）、表语从句（9-12）、定语从句（12-22）、非限制性定语从句（22-24）、状语从句（24-37）一、名词性从句百科名片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。
名词性从句高考热点透视1. ___ is a fact that English is being accepted as an international language. (NMET 1995)A. ThereB. ThisC. ThatD. It答案D。
当名词从句在句中作主语时，为避免句子头重脚轻，常用it作形式主语置于句首，而将真正的主语从句放在句尾。
此时it只起先行引导作用，本身无实义。
此句也可以改写为：That English is being accepted as an international language is a fact.2．A computer can only do ____ you have instructed it to do．（NMET2001）A．how B．after C．what D．when答案C。
从句子结构可知，句子的空白处应该填引导宾语从句的连词，做主句谓语动词do的宾语，同时该连接词还是从句中的do的宾语，因此，此处的连接词应该用what。
3. He asked ____ for a violin．（MET1992）A. did I pay how muchB. I paid how muchC. how much did I payD. how much I paid答案：D。
宾语从句相当于特殊疑问句，句子语序要用陈述语序。
名词性从句专项---主语从句,宾语从句,表语从句,同位语从句
名词性从句专项一、知识梳理/提炼要点一：句子的分类根据句子的结构可分为：①简单句-—一主一谓。
②并列句-—由等立连词and, but, so, for把两个（以上）的简单句连在一起构成。
③复合句——一个主句+从句（一个或以上）构成.根据从句在复合句中的作用，分为名词性从句、定语从句和状语从句。
名词性从句包括主语从句、表语从句、宾语从句、同位语从句。
要点二：名词性从句总述1. 主语从句——在句中作主语,可用it作形式主语，把真正的从句放在句尾.如:It is still a mystery how the prisoner escaped.犯人是如何逃跑的是个谜。
主语从句中,谓语动词一般用单数。
What引导的主语从句,可根据表语决定。
如：What he needs is that book？What he needs are some book?主语从句常用的结构有：It is well known/reported/thought/said/… that…It is natural/surprising/necessary/certain/true/clear…that…It is a pity/a shame/an honor/no surprise/no wonder…that…It doesn’t't matter whether…It seems\appears that…It happens that…2. 表语从句——位于系动词之后充当复合句的表语，引导词that 一般可以省略，还可用as if/as though/because/why引导。
如：The question is who can complete the difficult task。
问题是是能完成这项艰巨的任务.３．同位语从句——跟在名词后面，进一步说明该名词的具体内容。
名词主要有：fact, news （word)，promise, idea, truth, thought，suggestion，hope，proposal, doubt等。
从句的类型及引导词总结
从句的类型及引导词总结从句是一种在句子中起到特定功能的句子成分。
它可以作为主句的主语、宾语、定语或状语，起到丰富句子意义和提供更多信息的作用。
从句根据功能和结构可以分为名词性从句、形容词性从句和副词性从句，而引导从句的词语则根据从句的类型来确定。
下面将对这些从句类型及其引导词进行总结。
一、名词性从句名词性从句在句子中扮演名词的角色，可以作为主语、宾语、表语或同位语。
常见的名词性从句有主语从句、宾语从句、表语从句和同位语从句。
1. 主语从句：从句作为整个句子的主语，通常以从属连词"that"引导。
例如：- What he said is true.（他说的是真的。
）- That he is late is unacceptable.（他迟到是不可接受的。
）2. 宾语从句：从句作为句子中的宾语，可以由多个引导词引导，如"that"、"if"、"whether"、"who"、"what"等。
例如：- I don't know if he will come.（我不知道他是否会来。
）- She asked me what my favorite color is.（她问我最喜欢的颜色是什么。
）3. 表语从句：从句作为句子中的表语，通常以从属连词"that"引导。
例如：- The fact is that he lied to us.（事实是他对我们撒了谎。
）- My dream is that I can travel around the world.（我的梦想是能环游世界。
）4. 同位语从句：从句作为另一个名词或代词的同位语，通常以从属连词"that"或连接代词/连接副词引导。
例如：- The news that she won the first prize was exciting.（她赢得一等奖的消息令人激动。
三大从句
三大从句从句是相对于主句而言的，即它是从属于某一个主句，而不能单独作一个句子。
在英语中，主要有三大从句，即名词性从句（包括主语从句，宾语从句，表语从句，同位语从句）、形容词性从句（即定语从句）、副词性从句（即状语从句,包括时间、条件、结果、目的、原因、让步、地点、方式等）。
1、主语从句用作主语，如：：That the earth is round is true. 地球为圆的是真实的。
2、宾语从句用作宾语。
如：Do you know where he lives?3、表语从句用作表语，如：My opinion is that you should not go alone. 我的意见是你不应单独前往。
4、同位语从句用于解释说明前面的名词。
如：The fact that the earth is round is true. 地球是圆的的事实是真实的。
（that从句用于解释说明the fact）5、定语从句相当于一个形容词，用于修饰前面的名词。
如：The student who answered the question was John. 回答问题的学生是John.6、状语从句相当于一个副词，如：When it rains, I usually go to school by bus. 天下雨时，我通常坐公共汽车上学。
（时间状语）If he comes tomorrow, you will see him. 如果他明天来，你就可以看见他。
（if 引导的条件状语从句，其结构为：if +状语从句，＋主句）。
要注意在状语从句中有一个规则是“主将从现”，即主句是将来时，则从句要用一般现在时表示将来。
主句和从句的划分方法是相同的。
句子的成分从谓语动词处来划分比较容易。
谓语动词前面的部分是主语，后面常接宾语，修饰谓语动词的是状语，修饰主语、宾语的是定语，若谓语是系动词，则系动词后的部分是表语。
如：I am a teacher. 其中，I 是主语，am是谓语，a teacher 是表语。
必考点04 主语、表语与同位语从句(解析版)
必考点04 主语、表语与同位语从句题型一主语从句【解题技巧提炼】在句子中起名词作用的各种从句统称为名词性从句。
根据它们在句中的语法作用,这类从句又可分为主语从句、宾语从句、表语从句和同位语从句。
所以充当主语的从句叫主语从句。
主语从句的常用引导词有：（1）连接词that;（2）连接词whether;（3）连接代词:what, who, which, whom, whose,whatever, whoever, whomever, whichever等;（4）连接副词:when, where, how, why, whenever, wherever 等。
一、that引导的主语从句1.that引导主语从句时只起连接作用,在句子中不作任何成分,也无任何意义。
that引导主语从句时通常不能省略,尤其是位于句首时。
*That he will win the medal seems unlikely.他似乎不大可能获得奖牌。
2.有时为了平衡句子结构,用it充当形式主语,而将that从句置于后面。
*It is certain that she will do well in her exam.毫无疑问,她考试成绩会很好。
3.主语从句中常用it作形式主语的句型有:(1)It+be+形容词(clear, obvious, true, possible, certain, important, necessary, strange, natural, likely, surprising, vital等) + that从句*It is obvious that he has done what he can to help you.很明显,他已经尽了最大努力来帮助你。
(2)It+be+名词(词组)(a pity, a shame, an honour, a fact, no wonder, no surprise等) + that从句*It’s an honour that we have been invited to the party.很荣幸我们能被邀请参加宴会。
英语名词从句包括主语从句、宾语从句、表语从句和同位语从句等。
英语名词从句包括主语从句、宾语从句、表语从句和同位语从句等。
翻译时大多数可译成相对应的汉语，但也还有一些其它处理方法。
下面分别加以介绍：一、主语从句1.以what, whatever, whoever等代词引导的主语从句一般可按原文顺序翻译，例如：What he told me is only half-truth.他告诉我的只是些半真半假的东西而己2.以“it”作形式主语的主语从句1）逻辑主语从句如提前译出，有两种情况：若强调，“it”一般可译出来；如不强调，“it”可不译出来。
It doesn't make much difference whether he attends the meeting or not.他参不参加会议没有多大关系。
（不强调）It seemed inconceivable that the pilot could have survived the crash.在飞机坠毁之后，驾驶员竟然还能活着，这看来是不可想象的。
（强调）2）逻辑主语从句不提前，“it”一般不需译出。
It is suggested that the meeting should be canceled.有人建议取消会议。
二、宾语从句1.用that, what, how等引起的宾语从句汉译时一般不须改变顺序。
I told him that because of the last condition,I′d have to turn it down.我告诉他，由于那最后一个条件，我只得谢绝。
2.用“it”作形成宾语的句子，that宾语从句可按原文顺序译出，“it”可不译。
I made it clear to them that they must hand in their papers before 10 o′clock in the morning.我向他们讲清楚了的，他们必须在上午十时前交卷。
名词性从句语法归纳
名词性从句一、种类：主语从句、表语从句、同位语从句和宾语从句（一）主语从句1．定义：在复合句中充当主语功能的从句。
2．句式：2 类A.整个从句位于复合句的句首。
That he will come makes us happy.What we need is more time.When he will come is still a question.Where he will go is still a question.Why he will go is still a question.How he will go is still a question.Whether he will go is still a question.Which book he will choose is still a question.B.形式主语it句式It makes us happy that he will come.It is more time what we needIt is still a question when he will come.It is still a question where he will go.It is still a question why he will go.It is still a question how he will go.It is still a question whether he will go.It is still a question which book he will choose.注意问题1．引导主语从句的区别that引导主语从句,在从句中不充当句子成分，只起到符号标志的作用，没有具体的含义，但不能省略。
What引导主语从句,在从句中充当句子成分（主语、宾语或表语），有具体的含义。
对比：（That he will come）makes us happy.（that在从句中不做句子成分）（What we need）is more time（what在从句中做need的宾语）2．表示“是否”时：A句式用whether, B句式whether 或if 都可用，但当or not 出现时用whether。
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高中语法—主语从句+表语从句+同位语从句❖讲解●主语从句一．定义：在句中起主语作用的从句二．语序—陈述句语序When will he come is not known. ×→When he will come is not knownWhether can animals be well protected is of great importance.×→Whether animals can be well protected is of great importance.→陈述句语序：连接词+主语+谓语+其他成分三．连接词1.从属连词：that/whether①that：没有意义，不作成分，不可省略(that=口袋→把句子装起来）@3.10,25,28,30②whether“是否”不可省略,不可用if代替---Whether they would support us was a problem.（if“如果”有歧义）@4.5 ,312.连接代词①who,whom,what,which,whose,whoever,whomever,whatever,whichever②特定意义，不可省略③在主语从句中做成分What we need is water.---作宾语@29Who will go makes no difference.---作主语@12，14,17,19，#4,12Who he is remains uncertain.---作表语Whose shirt it is remains unknown. ---作定语#16*Whoever(Anyone who) wants to enter into this school must take the exam. ---无论是谁@18*Whatever(Anything that) she did was right. ---@2①when,why,how,where②特定意义，不可省略③作状语，表示时间，地点，原因，方式When he will be back depends on the weather.---时间状语Where the test will be given is not yet decided.---地点状语#14Why dinosaurs died out remains a puzzle.---原因状语#13How this happened is not clear to anyone. ---方式状语四．时态：不受主句的时态影响和限制五．It作形式主语1.结构it is...that...（无意义，不做成分）①It is certain that she will do well in her exam. →It is+a.+that...②It’s a pity that we can’t go.→It is+n.词组+that...(no wander难怪，an honor荣耀）@1，16,20③It is said that Tiny Times is a good movie→It is said,reported,suggested,well-known+that...@13#6④It happened that I was out that day.→ It + 特殊动词（seem似乎，happen碰巧doesn’t matter）+ that ...@6,7,8 2.It is+其他连接词（有意义，作成分）It was a problem whether they would support us.It is hard to understand why there is gravity.@11,15,#73.否定前移It seems that they are not from the same university.→It doesn’t seem that they are from the same university.六．注意1.主语从句中的连词---不能重叠使用That whether he will help others is a fact.×→That he will help others is a fact.2.含主语从句的主句谓语动词---用单数第三人称形式When he will come are a puzzle.×→When he will come is a puzzle.@9,#23.what 引导的主语从句---根据表语决定主句动词的单复数形式①What he needs is that book.②What he needs are some books.●表语从句That is what he is worried about.一．定义：在句子中作表语的句子，be,look,seem,appear,sound,feel,remain+表语从句二．语序—陈述句语序三．连接词=主语从句@191.seem,appear,look,sound,feel+as if/as though“好像...”①It looked as f it was going to rain.②It sounds as though someone is knocking at the door.2.The reason why I came late is that my car broke down on the half way.He came late. That’s because his car broke down.His car broke down on the half way. That’s why he came late.四．时态：与主句无关●同位语从句The fact （名词）that he is older than me is obvious.一．定义:解释说明某一名词的内容和实质的从句=该名词(fact,idea,news,promise)I have no idea who will be our teacher.The question why the actress was killed is not clear.二．语序—陈述句语序三．连接词=主语从句，都不能省略#3四．时态：与主句无关❖当堂练习主语从句答题技巧：动词前面是主从，缺啥补啥选连词，that句首不能省，if不可替whether,it形主要记牢，常用that不可省，不做成分无意义，其他连词作成分.1.What a pity _____is _____you didn’t arrive by daylight.A. there, becauseB. it, thatC. he, whenD. that, forB.你白天没来真可惜呀，①what a pity it is!...真可惜呀②it作形式主语，真正主语that you didn’t arrive by daylight2. We are ready to do ______ the country wants us to do.A. whatB. whichC. no matter whatD. whateverD①根据句意，选无论什么CD②no matter what不能引导名词性从句，不能放句中；引导让步状语从句，放句首：No matter what happened, he would not mind.③whatever,句首句中都可以放3.It is a pity that you (should) miss such a good chance.___ he made an important speech at the meeting was true.A.ThatB. WhyC. WhatD. HowA.that引导主语从句，不做成分，不可省略4. ___we’ll go camping tomorrow depends on the weather .A IfB WhetherC ThatD WhereB句意是否5.____ his dream of going to college will come true is uncertain.That B. Whether C. If D. Even ifB句意是否6. It is known to us ___ where there is pollution, there is harm.A. whichB. whereC. whatD. ThatD.it作形式主语7.It’s known to us all ___ a form of energy .A.water isB. that water isC. is waterD. that water toB.It is known to us all that...it作形式主语8. It worried her a bit ___ her hair was turning gray.A. whetherB. thatC. whatD. WhenB.it作形式主语9.What I say and think ___ none of your business.A.isB. areC. has D haveA含主语从句的主句谓语动词---用单数第三人称形式10--- I saw your neighbor break your window with a basketball.--- __A__ it made me nearly mad.A. That he brokeB. What he brokeC. He brokeD. His break11.It remains a question _A___ we can get so much money in such a short time.A.howB. thatC. whenD. what12. They lost their way in the forest and __A__ made matters worse was _表语从句__ night began to fall.A. what; thatB. it; thatC. what; whenD. which; what13. ___A_____that they found an unusual plant in the forest.A. It is saidB. They are saidC. It saidD. It says14. ___A__ caused the accident is still a complete mystery.A. WhatB. ThatC. HowD. Where15. It worried Mary a lot __A___ she would pass the college entrance examination.A. whetherB. ifC. thatD. how16. __A__ is no possibility ______ Bob will win the first prize in the match.A. There, thatB. It, thatC. There, whetherD. It, whetherThere is no possibility=it is impossible含有no一般用there：there is no doubt17. ___B_surprised me most was _____such a little girl of seven could play the violin so well.A. That; whatB. What; thatC. That; thatD. What; whatThat引导表语从句18. ___C__ helped to save the drowning girl is worth praising.A. WhoB. AnyoneC. WhoeverD. The personWhoever=anyone who19. ___A_ she couldn’t understand was _____ fewer and fewer students showed interest in her lessons.A. What; whyB. That; whyC. What; becauseD. Why; thatWhy引导表语从句20. It was __A__ he said ___ disappointed me.A. What; thatB. That; thatC. What; whatD. That;what❖名词性从句综合练习名词性从句答题技巧：动词后面是宾从，动词前面是主从，be的后面加表从，名词后面同位语；一看陈述句语序，二看连词选什么，连接代词看缺啥，连接副词看句意；主从that不可省，同位连词都留下，三看时态四it，既作形主又形宾。