(完整版)高一名词性从句框架
名词性从句
坐落在表语座位的从句
京城四少
躺在同位语位置上的从句
住在主语位置上的饿从句
（1）无名无分： that
在句子当中不担当任何成分，只是起着引导的作用，常常用在
Believe 、hear 、 hope ，know ，say, feel ,think 等动词后面
（2）“是否”： whether + if
常用在ask, care, find out, know, wonder 等动词后面，引出带有疑问词
意义的宾语从句 1.宾语从句
（3）有名有分： 连接代词:who whom whose which what:引导主宾定表
连接副词 ：where when how why ：引导状语
E.g I want to know whose coat that is.
I know what he wants to say.
She knows who will be the winner.
They ask when the game will be over.
He asked me how I came to school.
(4)复合宾语：在复合宾语中，宾语如果是一个从句，则把该从句置于宾补之后，而在原
位置上用it 来做宾语（形式宾语）
即是：Vt + 宾语+Vt + it + 宾补+从句
E.g I made it clear that I was determined to carry out the plan.
（1）连词that引导表语从句，不能省略
（2）if 表示“是否”时，不能引导表达从句，必须用whether
（3）在表语从句当中，只能用that引导的情况
A. 主语为the result 时
The result is that he is the winner.
B. 主语为“原因”，“理由”时
The reason is that ....
2.表语从句 C. 由why 引导的从句做主语的时候
Why he was late was that ...
D.在固定搭配中，“the truth is that", "the fact is that",
"this /that /it/ was/is because"中
（4）连系动词look，seem，sound，be, become等+as if /though等引导表语从句
（1）表达“是否”，只能用whether
（2）间隔式同位语从句，做主语的同位语从句有时会被谓语动词将其与名词分开。
A saying goes that practice makes perfect.
（3）建议，要求，决定，命令，劝告，等名词时，同位语从句要用（should)+动词原形
Advice, suggestion, proposal, demand, request, requirement, order,
3.同位语从句recommendation
（4）whether
no doubt，that
在宾语从句中，that如果做宾语，可以省略，同从中，that一般不省略
主语从句位于句首
4.主语从句：二意：即2种不同的结构
“三心二意”主语从句在句尾，句首由it充当形式主语
（1）it seems /appears+adj.+句子
（2）be possible/impossible/likely
（3）be a pity/wonder
（4）在固定搭配中it is known/believed/said/hoped
（1）无名无分：that,位于句首，不能省略
（2）有名无分：whether“是否”
What/who/whom/which/whose
三心：即连接词有三种形式（3）有名有分when/where/why/how
Whatever/whoever/whomever
whichever
(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.
定语从句专项讲解细致导入
新高一衔接班 第二课时定语从句【Atrributive Clause 】 Part one 导入 先听一首歌‘season in the sunshine, 这是为了纪念好友离世的歌曲，很温暖的曲 调 We had joy,we had fun,we had seasons in the sun,but the hills that we climbed were just seasons out of time. 我们曾一起欢乐，我们曾一起嬉戏，我们曾拥有 的阳光中的四季，但是我们一起爬过的山已随四季流去。 好，言归正传，今天我们讲定语从句，你们初中已经学习过，但是我之前讲过高中的语法会比 初中难度增加。为了配合大家的节奏，我由简单到复杂。什么是定语从句？刚那句歌词就是定 语从句。 再看：June 是老师—June 是英语老师—June 是漂亮幽默的英语老师 你们敢说不对？ 再看一句：这是一只狗---- 这是一只受伤的狗--- 这是一只左腿受伤的狗 继续继续：这房子很漂亮The house is very beautiful. Lily 买的房子很漂亮The house which bought by Lily is very beautiful. Lily 去年在米易买的房子很漂亮The house which bought by Lily last year in MY is very beautiful The boy is Luhan The boy who is dacing is Luhan 唱小芳，谁会？： 村里有个姑娘叫小芳，长得好看又善良 There is a beautiful and kind girl whose name is Xiao Fang in the village 遥远的东方有一条龙，它的名字叫中国 In the far East, thers is a dragon whose name is China. 遥远的东方有一条河，它的名字叫黄河? 所以概念出来啦 一．定语从句及相关概念 定语就是修饰限定名词或代词的词语 定语从句（Attributive Clauses ）就是复合句中具有修饰限定名词或者代词的句子，在整个 句中做定语。 被修饰的名词或代词称为先行词。定语从句通常出现在先行词之后，由关系词（关系代词或关系副词）引出，关系词就是连接主句和从句的词语。 我们去我们之前的句子中找先行词和关系词！ 再看看几个句子。走向复杂化 Is there anything that you（主）don't understand （谓）about the problem? 先行词关系代词(指代anything ）定语从句（修饰anything ，意思为“关于 这个问题，你不明白的东西”） Life is like a long race where we （主）compete with （谓）others （宾）to go beyond ourselves ）定语从句（修饰 a long race ，先行词关系副词(指代“介词+a long race ” ） 意思为“在这个长跑中，我们不断超越自己去竞争。”
定语从句知识结构图解
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2020届高三精准培优专练六 名词性从句(教师版)
2020届高三好教育精准培优专练 培优点六名词性从句 一、真题在线 1. 【2019·江苏·单项选择】Scientists have obtained more evidence ________ plastic is finding its way into the human body. A. what B. that C. which D. where 【答案】B 【解析】考查同位语从句。句意：科学家已经获得更多证据，塑料正在进入人们的体内。从句不缺句子成分，意思完整，且与“evidence”指代的是同一事件，用that引导同位语从句。故选B。 2. 【2018·天津·单项选择】The gold medal will be awarded ___________to wins the first place in the bicycle race. A. whomever B. wherever C. whoever D. whatever 【答案】C 【解析】考查名词性从句连接词。句意：无论谁获得自行车比赛第一名，金牌将授予他。分析句子可知，宾语从句中缺少主语，故用whoever，表示“任何人，无论谁”。故选C。 3.【2018·北京·单项选择】This is _________ my father has taught me — to always face difficulties and hope for the best. A. how B. which C. that D. what 【答案】D 【解析】考查名词性从句。句意：这是我父亲教我的——总是要面对困难，抱最大的希望。“________ my father has taught me”是表语从句，该空在从句中作“teach”的宾语，且表示“父亲教我的道理”，故该从句应用what 引导。D项正确。引导名词性从句时,how表方式，意为“如何”；which意为“哪一个”；that只起引导从句的作用，不做成分。 4. 【2018·北京·单项选择】Without his support, we wouldn’t be _________ we are now. A. how B. when C. where D. why 【答案】C
(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。
(完整版)高中英语定语从句讲解及练习
高中英语定语从句讲解及练习 定语从句是高中重点知识，也是高考常考点，大家也不容易掌握，这篇文章主要教你关系代词引导的定语从句 关系副词引导的定语从句判断关系代词与关系副词限制性和非限制性定语从句等内容，有例题讲解定语从句在句中做定语，修饰一个名词或代词，被修饰的名词词组或代词即先行词。定语从句通常出现在先行词之后，由关系词（关系代词或关系副词）引出。 关系代词有：who, whom, whose, that, which等。 关系副词有：when, where, why等。 18.1 关系代词引导的定语从句 关系代词所代替的先行词是人或物的名词或代词，并在句中充当主语、宾语、定语等成分。关系代词在定语从句中作主语时，从句谓语动词的人称和数要和先行词保持一致。 1）who, whom, that 这些词代替的先行词是人的名词或代词，在从句中作主语和宾语。例如： Is he the man who/that wants to see you? 他就是你想见的人吗？（who/that在从句中作主语） He is the man whom/ that I saw yesterday. 他就是我昨天见的那个人。（whom/that在从句中作宾语） 2）whose 用来指人或物，（只用作定语, 若指物，它还可以同of which互换）。例如： They rushed over to help the man whose car had broken down.那人车坏了，大家都跑过去帮忙。 Please pass me the book whose （of which）cover is green.请递给我那本绿皮的书。 3）which, that所代替的先行词是事物的名词或代词，在从句中可作主语、宾语等。例如： A prosperity which / that had never been seen before appears in the countryside. 农村出现了前所未有的繁荣。（which / that在句中作宾语） The package （which / that）you are carrying is about to come unwrapped. 你拿的包快散了。（which / that在句中作宾语） 18.2 关系副词引导的定语从句 关系副词可代替的先行词是时间、地点或理由的名词，在从句中作状语。 1）关系副词when, where, why的含义相当于\"介词+ which\"结构，因此常常和\"介词+ which\"结构交替使用。例如： There are occasions when （on which）one must yield.任何人都有不得不屈服的时候。 Beijing is the place where（in which）I was born.北京是我的出生地。 Is this the reason why （for which）he refused our offer?这就是他拒绝我们帮助他的理由吗？ 2）that代替关系副词，可以用于表示时间、地点、方式、理由的名词后取代when, where, why和\"介+which\"引导的定语从句，在口语中that常被省略。例如： His father died the year （that / when / in which）he was born.他父亲在他出生那年逝世了。 He is unlikely to find the place （that / where / in which）he lived forty years ago. 他不大可能找到他四十年前居住过的地方。 18.3 判断关系代词与关系副词 方法一：用关系代词，还是关系副词完全取决于从句中的谓语动词。及物动词后面无宾语，就必须要求用关系代词；而不及物动词则要求用关系副词。例如： This is the mountain village where I stayed last year. 这是我去年呆过的山村。 I'll never forget the days when I worked together with you.我永远不会忘记与你共事的日子。 判断改错： （错）This is the mountain village where I visited last year. （错）I will never forget the days when I spent in the countryside. （对）This is the mountain village （which）I visited last year. （对）I'll never forget the days （which）I spent in the countryside. 习惯上总把表地点或时间的名词与关系副词where, when联系在一起。此两题错在关系词的误用上。 方法二：准确判断先行词在定语从句中的成分（主、谓、宾、定、状），也能正确选择出关系代词/关
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。
(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
高一英语定语从句讲解精华版
定语从句 一、基本概念： 定语： 定语从句： Do you know the man who spoke at the meeting just now That is the house where he lived ten years ago. 引导词：关系词 关系代词有：that, who, whom, whose, which; 在从句中充当： 关系副词有：when, where, why. 在从句充当： 先行词： 定语从句中引关系词的作用： 二、关系词的用法： （一）关系代词的用法： 1． He is the man lives next door. The train has just left is for Shenzhen. 2． The man ________ we have just seen is a famous writer. Where is the book ___________I bought last week （二）关系副词的用法： 1． I still remember the time ________I first became a college student. Do you know the date __________Lincoln was born
(三) 使用关系副词应注意下列几点： 1．这三个关系副词在意义上都相当于一定的介词+which结构： when = on (in, at, during…) + which; where = in (at, on…) + which; why = for which. 如： I was in Beijing on the day when (=on which) he arrived. The office where (=in which) he works is on the third floor. This is the chief reason why (=for which) we did it. 2．当先行词是表时间的time, day等和表地点的place, house等时，一定要注意分析从句的结构，如果缺少主语或宾语时，关系词应该用which或that, 缺少时间状语或地点状语时，才能用when或where，试比较： I’ll never forget the day _________ my hometown was liberated. I’ll never forget the days____________we spent together last summer. His father works in a factory____________radio parts are made. His father works in a factory______________makes radio parts. 三．限制性定语从句与非限制性定语从句 1．限制性定语从句 This is the telegram which he refers to. Is there anything (that) I can do for you 2．非限制性定语从句 This note was left by Tom, who was here a moment ago. As a boy, he was always making things, most of which were electric.
高中定语从句知识结构图解(答案解析版)
图解定语从句 概念：定语可以由形容词,名词,代词,分词,不定式以及介词短语等来担任，也可以由一个句子来充当，充当定语功能的句子称为定语从句。 ①指人的先行词 ⒈先行词：被定语从句所修饰的名词或代词 ②指物的先行词 ★先行词还可以是前面整个句子所叙述的事情。 He has passed the driving test, which surprises all of us. 先行词(which替代前面所叙述的事情) 替代前面的先行词（替代作用） 关系词的作用②连接主句和定语从句（连接作用） ③在定语从句中作句子成分（成分作用） 定语从句 “三要素”⒉关系词: 引导定语的词 标准:根据关系词在从句中做的句子成分种类 关系词的分类关系代词：在从句中做主,宾，表，定 （that/which/who/whom/whose/as） 关系副词：在从句中作状语 (When/where/why) ⒊定语从句：用来做定语，修饰限定先行词的句子。 ①限制性定语从句：对先行词起限定修饰作用。 定He is a teacher who works at our school. 定语从句②非限制性定语从句：对先行词起补充说明作用 的分类 (先行词与定语从句之间有逗号隔开) 语Beijing, which is the capital of China, is a beautiful city with a long history. 比较:He has two sons, who work in the same company. (He has only two sons.) 从He has two sons who work in the same company. (Perhaps he has two more sons) 句
(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