名词性从句的用法
名词性从句的用法
名词性从句包括主语从句?表语从句?宾语从句和同位语从句?引导名词性从句的连词有:who；whom；whose；what；which；when；where；why；how；that；if；whether；whatever；whenever；wherever；however 等?
名词性从句注意事项:从句的语序为陈述句；连词that不充当任何成分；what总是要
充当主语?表语?宾语等?
if和whether的区别:if引导宾语从句和条件状语从句；whether引导主语从句?表语
从句?宾语从句和同位语从句?
(一)主语从句
用作主语的从句，叫主语从句?主语从句可以直接放在句首；也可用it作形式主语，而将从句放在句末?
常见的用it作形式主语的复合结构:
It is + 名词 + that从句；It is a fact(a pity，a shame，no wonder，good news...)that...
It is + 形容词 + that从句；It is necessary(strange，important，wonderful，possible，likely，...)that... 这类句中谓语动词多为(should) + 动词原形?
It is + 过去分词 + that 从句；It is said(reported，decided，believed，...)that...
It + 不及物动词 + that 从句；It seems(happened，doesn’t matter，has turned out，...)that...
What you need is more practice. 你需要的是更多的练习?(what在从句中作need的宾语)
What is hard is to do good all one’s life and never do anything bad. 难的是人的一生都做好事?从不做坏事?(what在从句中作主语)
What he will be in the future is known to us. 我们知道他未来会干什么?(what
在从句中作be的表语)
Who will go makes no difference. 谁去都一样?
How this happened is not clear. 这件事是怎样发生的还不清楚?
Why he did that wasn’t quite clear. 他为什么那样做相当不清楚?
Whether she will join us won’t make too much difference. 她是否加入我们没多大区别?(此处不能用if)
Whoever comes will be welcome. 不管谁来都受欢迎?(whoever在名词性从句中相当
于anyone who)
Whatever she did was right. 不管她做什么都是正确的?(whatever在名词性从句中
相当于anything that)
It is possible that I may not be able to come. 可能我不能来了?(it是形式主语，真正的主语是that I may not...部分)
It doesn’t seem likely that she will be here. 看来她不会来这了?
Isn’t it strange that he should have left without telling us?他没有告诉我们就离开了，难道不奇怪吗?
It occurred to me that he had forgotten to take his notebook with him. 我想起来，他忘记随身带笔记本了?
That we need more equipment is quite obvious. 很明显，我们需要更多的设备?
Has it been announced when the planes are to take off?已经宣布飞机什么时候起飞了吗?
(二)表语从句
用作表语的从句叫表语从句?它位于连系动词(如be，seem，remain 等后)?
The question is whether we should accept their invitation. 问题是我们是否应当接受他们的邀请?
The city is no longer what it used to be. 这个城市不再是曾经的样子?
This is why we put off the meeting.(why表结果)这就是为什么我们推迟了会议?
That is because he was ill.(because表原因)那是因为他生病了?
The reason for his absence was that he was ill.(此处不能用because代替that . 句型:The reason... is that...)他缺席的原因是他生病了?
as if 引导的表语从句有时可用虚拟语气，表示可能性小?
He acted as if he hadn’t eaten for a long time.
表示建议?命令?要求一类的表语从句要用虚拟语气:
My suggestion is that you should practise reading English every day.
(三)宾语从句
作宾语的从句叫宾语从句?
作动词的宾语:
He doesn’t know where the post office is. 他不知道邮局在哪里?
在动词suggest，order，demand，require等表示建议?命令?要求的宾语从句要用虚拟语气(宾语从句的谓语用should + 动词原形，should 可省略?)
I suggested that you(should)start right now. 我建议你马上开始?
如果宾语从句后有宾语补足语，要用形式宾语it，而将从句放到补足语后面?
I thought it strange that he didn’t pass the exam. 我觉得他没通过考试很奇怪
?
在think，believe，suppose，expect等动词后的宾语从句中，如果从句谓语是否定含义，则不用否定形式，而将主句谓语动词think等变为否定形式?
I don’t think you are right. 我想你是不对的?
He doesn’t know where the post office is. 他不知道邮局在哪里?
在think，believe，imagine，suppose，guess，hope等动词以及I’m afraid等后，可用so代替一个肯定的宾语从句，还可用not代替一个否定的宾语从句: Do you believe it will clear up?你认为天会放晴吗?
I believe so.(I don’t believe so. /I believe not.)我认为会?(我认为不会?)
(2)作介词的宾语:
Did she say anything about how we should do the work?他有没有说我们应当怎样做这个工作?
That引导的宾语从句只有在except，in，but，besides等少数介词后偶尔可能用到?
Your article is good except that it is too long. 除了太长外，你的论文很好?
有时在介词和其宾语从句的中间加形式宾语it?
I’ll see to it that everything is ready. 我将负责把一切准备好?
(3)作形容词的宾语:
I’m afraid that I have made a mistake.
if和whether引导宾语从句的区别，即用whether不用if的情况有:
作介词宾语，用于whether + to do?whether or not和用作discuss的宾语等?
It depends on whether it is fine. 要看天气是否晴朗?
I’m not sure whether to leave this afternoon. 我不敢肯定今天下午是不是要出发?
He can not decide whether or not to take the exam. 他不能决定参不参加考试?
We are discussing whether we will hold a meeting this weekend. 我们在讨论这个周末是否要举行一场会议?
doubt用于肯定句中，宾语从句可以用if或whether引导?
I doubt if(whether)you will come for a visit tomorrow. 我怀疑你明天是否要来拜访一下?
doubt用于否定句或疑问句中，宾语从句用that引导?
He doesn’t doubt that his mother will give him a ride home for sure. 他很确信他的妈妈会开车带他回家?
(四)同位语从句
同位语从句跟在一个名词后(如fact，idea，news，hope，belief，thought，doubt，proof，belief等)，对其作进一步解释?
I have no idea that you were here. 我不知道你在这里?
He can’t answer the question how he got the money. 他不能回答他是如何拿到那笔钱的?
同位语从句和定语从句的区别:
从意义上讲，前者对名词加以解释说明，后者对名词进行修饰限定?从结构上讲，前者由连接词引导，后者由关系词引导?从内涵上讲，前者所说明的名词与从句没有逻辑关系，that不可省略?后者所限定的名词是从句逻辑上的主语?宾语?表语?定语?状语等?当被限定
的名词是从句逻辑上的宾语时，that 可省略?
The news that they won the match is true. 他们赢得比赛的消息是真的?(同位语从句，news和从句没有逻辑关系，that不可省略)
The news that you told us yesterday is true. 你昨天告诉我的那个消息是真的?(定语从句，news 是told 的逻辑宾语，that可省略)
what引导名词性从句五种用法
what引导名词性从句的五种用法 一、用法归纳 1. 表示“……的东西或事情”： They’ve done what they can to help her. 他们已经尽力帮助了她。 He saves what he earns. 他赚多少，积蓄多少。 What Mary is is the secretary. 玛丽的职务是秘书。 2. 表示“……的人或的样子”： He is no longer what he was. 他已经不是以前的那个样子。 He is what is generally called a traitor. 他就是人们通常所说的叛徒。 Who is it that has made Fred what he is now? 是谁把弗雷德培养成现在这个样子的？ 3. 表示“……的数量或数目”： Our income is now double what it was ten years ago. 我们现在的收入是10年前的两倍。 The number of the students in our school is ten times what it was before liberation. 现在我校学生的数量是解放前的10倍。 4. 表示“……的时间”： After what seemed like hours he came out with a bitter smile. 似乎过了几个小时他才苦笑着出来。 The young girl was too frightened to speak, standing there for what seemed like hours. 小女孩吓得不敢说话，在那儿站了几个小时。 5. 表示“……的地方”： This is what they call Salt Lake City. 这就是他们称为盐湖城的地方。 In 1492, Columbus reached what is now called America. 1492年哥伦布到达了现在所称的美洲大陆。 二、用法说明 (1) 这样用的what相当于“先行词+关系代词”，所以其前不能有先行词： 你喜欢什么就拿什么吧。 正：You can have what you like. / You can have everything (that) you like. 误：You can have everything what you like. (2) 有时what 可用作限定词，其后修饰一个名词： I gave him what books I had. 我把我所有的书都给他了。 He gave me what money he had about him. 他把身边带有的钱全给了我。 (3) What 后的名词可以是复数名词或不可数名词，但通常不能是单数可数名词： 误：I gave him what book I had.
名词性从句用法详解
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。 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。如： I hope (that) you enjoy your holiday. 希望你假期过得好。（宾语从句可省） That he likes you is very obvious. 很显然他喜欢你。（That引导主语从句不能省） 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。 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 why she wanted to leave. 这就是她想离开的原因。 When we arrive doesn't matter. 什么时候到没有关系。 Tell me which one you like best. 告诉我你最喜欢哪一个。 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。如： The question is how we should carry out the plan. 问题是怎样执行这个计划。 When she’ll be back depends much on the weather. 她什么时候回来在很大程度上要看天气。 Why he did it will remain a puzzle forever. 他为什么这样做将永远是一个谜。 三、名词性从句的重要引导词 1. what 用于引导名词性从句是一个十分重要的引导词，它可引导主语从句、宾语从句和表语从句，但不用于引导同位语从句。它引导的名词性从句有两个意思是：一是表示“什么”，带有疑问意味；二是表示“…所…的”，相当于一个先行词后接一个关系代词。 如： I don’t know what you want. 我不知道你想要什么。 I don’t know what you want is this. 我不知道你所想要的是这个。 2. whoever, whatever, whichever 等也可引导名词性从句，其意分别为“所…的一切事或东西”、“任何…的人”、““…的任可人或物”等。如： Whoever wants the book may have it. 任何人要这书都可拿去。 I’ll do whatever I can to help him. 我们将尽我们所能来挽救他。 注意以下受汉语意思影响而弄错的句子： 任何人来都欢迎。 误：Who comes will be welcome. / Anyone comes will be welcome. 正：Whoever comes will be welcome. / Anyone who comes will be welcome. 另外，它们也可引导让步状语从句，其意为“无论…”、“不管…”，其意相当于no matter who [what, which]。如： Whatever happens, you must be calm. 不管发生什么情况，你都必须镇静。(whatever = no matter what)
what引导名词性从句
what引导名词性从句 what引导主语从句 1. What David used to say was always new and worth hearing and all his pupils loved him. 2. What makes the book so special is the name of the writer. 3. What impresses me about his painting is the colors he uses. 4. What you said at the meeting describes a bright future for the company. 5. What is important is that we let others know we care about them. 解析考查主语从句的引导词。根据句子结构可知，系动词is前的句子缺少主语，表示“重要的事情”要用what。 6. What some people regard as a drawback is seen as a plus by many others. 意思：一些人看作是缺点的东西却被许多其他的人看作优点. 7. What struck me most in the movie was the father's deep love for his son. 解析本题考查主语从句。句意：这部电影让我最感动的地方就是父亲对儿子的深深的爱。主句谓语动词was之前为主语从句，其中缺少主语指事物，故使用代词what。
What引导宾语从句 1.I’m interested in what you’ve sai d. (介词后的宾语从句) 2. Tina is much more confident behind the wheel than what she was when she started. (介词后的宾语从句) 3. If you swim in a river or lake, be sure to investigate what is below the water surface. Often there are rocks or branches hidden in the water. 解析如果你在河里或湖里游泳的话，务必调查清楚水面之下有什么。水中经常隐藏着石头或树枝。根据后面rocks and branches可知，此处要用what来引导。 4. Reading her biography，I was lost in admiration for what Doris Lessing had achieved in literature. 解析句意：读了多丽丝·莱辛的传记，我很钦佩她在文学上获得的成就。考查名词性从句。考查宾语从句的连接词。在介词for后的是宾语从句，从句中缺少achieve的宾语，故用what引导。(介词后的宾语从句) 5. Pick yourself up.Courage is doing what you're afraid to do. 解析考查名词性从句。句意：跌倒后再站起来。勇气是做你不敢做的事情。这里含有一个宾语从句，引导词在从句中作do的宾语，所以用what。 6. It is difficult for us to imagine what life was like for slaves in the ancient world.
高中英语名词性从句 which的用法
一、在名词从句中连接词which 有两种词性, 常用来引导宾语从句： 1. [连接代词] 哪个 1）用作从句的主语，如： He wanted to know which was on the table. 他想知道哪一个在桌子上。 2) 用作从句的宾语，如： He asked me which I liked best. 他问我最喜欢哪一个。 2. [连接形容词]放在名词前作定语，表示“哪个XX，哪些XX”，如： Do you wnow Which country is the largest? 你知道哪国家一个最大? Could tell me which children made him still more angry. 能告诉我那些 孩子使他更加生气了。 二、which 除引导上述宾语从句外，还可以引导主语从句和表语从句。 1. 主语从句(常用形式主语it) It was clear which children made him still more angry. 显而易见那些孩子使他更加生气了。 It is known to us which he liked best. 众所周知他最喜欢哪一个。 2. 表语从句 That was which children made him still more angry. 那就是那些孩子使他更加生气了。 This is which he liked best. 这就是他最喜欢哪一个。 三、which 与what 的区别 用在名词从句中，which 意思是“哪一个/那一些”，what 意思是“所...的”，后者等于“先行词+关系代词”，如你的补充问题就需要选择what： It's quite different from what I read last month. = It's quite different from (the one that) I read last month. 这本书与我上周所读过的那一本区别很大。 1.that在所有名词性从句中无成分无意义。 2.which强调哪一个，有一个选择的范围。 从句中from后边缺宾语，所以要选择的是宾语从句的引导词，首先that引导宾语从句时，不做介词宾语（除了in,except,but) 其次read后边缺宾语，也就是从句中缺成分，参见上面第一条，所以排除that.B选项which指哪一个，这里
(完整word版)名词性从句归纳
名词性从句归纳 一、名词性从句概说、结构与功能 名词性从句是起名词作用的从句，其功能相当于名词词组，在复合句中可作主语、宾语、表语和同位语。与之对应的名词性从句分别为主语从句、宾语从句、表语从句和同位语从句。 二、主语从句 1、主语从句的类别 ●以从属连词that 引导的主语从句。（从句位于句首，that通常不省略） → That she will come to the conference has excited every one of us. ●以从属连词whether 引导的主语从句。（从句置于句首时一般不用if来代替whether） → Whether we’ll go outing depends on the weath er. ●以连接代词（what, whatever, who, whoever, which, whichever等词）引导的主语从句。 → Whoever will be in charge of the project hasn’t been decided yet. 【注】what 与that在引导主语从句时，what 不但起连接作用，而且还有具体意义，意为“所…的”，相当于the things that结构；而that则无词义。即如果从句中不缺少主语或宾语时，选择that，否则用what。 ●以连接副词（when，where, how, why 等词）引导的主语从句. → When the new road is open to traffic has not been made clear. 2、用it 作形式主语的主语从句 注：以下几种特殊情况必须用it作形式主语： ⑴ It is + adj. + that 从句 常见的形容词有：necessary，right，likely，wrong，important，certain，clear，obvious，strange 等。 → It is likely that there will be a snowstorm tomorrow. ⑵ It is + noun + that 从句 常接这种句型的名词有：a pity, a shame, good news, a fact, an honor, a wonder, no wonder 等。 → It is a pity that you didn’t attend the lecture [讲座] yesterday. ⑶It is + 过去分词
【英语】英语名词性从句解题技巧讲解及练习题(含答案)
【英语】英语名词性从句解题技巧讲解及练习题(含答案) 一、初中英语名词性从句 1．_______ makes me feel worried is _______ singing stars are centered on by masses of teenagers today. A. What; what B. That; that C. What; that D. That; what 【答案】 C 【解析】【分析】句意：让我感到担忧的是，今天的歌星是以青少年为中心的。分析句子可知，主语从句中的谓语动词makes 缺少主语，主语从句中缺少宾语一般用what，因此选择 what 来引导主语从句；系动词 is 后面的表语从句句意完整，不缺少成分，因此选择 that 引导表语从句。分析选项可知C项符合题意，故选C。 【点评】考查名词性从句，本题涉及what引导的主语从句和that引导的表语从句的应用。 2．________ is known to us all that the old scientist, for ________ life was hard in the past, still works hard in his eighties. A. As; whose B. It; whose C. As; whom D. 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。第一空it is known to us all that…是个固定句型，意为“众所周知…”；第二空为介词+关系代词引导的定语从句，先行词the old scientist指人，作介词for的宾语，只能用whom，故选D。 【点评】考查名词性从句和定语从句，本题涉及固定句式it is known to us all that…和whom引导的限制性定语从句。 3．Some people believe _______ has happened before or is happening now will repeat itself in the future. A. whatever B. whenever C. wherever D. no matter what 【答案】 A 【解析】【分析】句意：一些人认为之前发生的或现在正在发生的任何事情在将来都会重复发生。Whatever has happened before or is happening now是一个主语从句，whatever既引导起这个主语从句，也在句中做主语。BC项都属于副词的性质，都不能做主语，通常只能做状语；no matter what只能用来引导状语从句，故选A。 【点评】考查名词性从句，本题涉及"特殊疑问词+ever"引导的主语从句。 4． is even more important is the earth cooled down, water began to appear on its surface.
名词性从句用法归纳
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名词性从句用法详解
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。 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。如： I hope (that) you enjoy your holiday. 希望你假期过得好。 That he likes you is very obvious. 很显然他喜欢你。 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 why she wanted to leave. 这就是她想离开的原因。 When we arrive doesn't matter. 什么时候到没有关系。 Tell me which one you like best. 告诉我你最喜欢哪一个。 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。如： The question is how we should carry out the plan. 问题是怎样执行这个计划。 When she’ll be back depends much on the weather. 她什么时候回来在很大程度上要看天气。 Why he did it will remain a puzzle forever. 他为什么这样做将永远是一个谜。 三、名词性从句的重要引导词 1. what 用于引导名词性从句是一个十分重要的引导词，它可引导主语从句、宾语从句和表语从句，但不用于引导同位语从句。它引导的名词性从句有两个意思是：一是表示“什么”，带有疑问意味；二是表示“…所…的”，相当于一个先行词后接一个关系代词。如： I don’t know what you want. 我不知道你想要什么。 I don’t know what you want is this. 我不知道你所想要的是这个。 2. what 引导名词性从句时可用作限定词，其后修饰名词。如： I gave him what books I had. 我把我所有的书都给他了。 He gave me what money he had about him. 他把身边带有的钱全给了我。 注：what 后的名词可以是复数名词或不可数名词，但通常不能是单数可数名词，并且后接不可数 名词时，有时可有little修饰，两者的区别是：what+不可数名词=所有的都，what little+不可数名词=虽少但全部。如：
what与whatever引导的从句
what与whatever引导的从句 作者：佚名文章来源：本站原创点击数：777 更新时间：2014-6-28 what与whatever引导名词性从句的区别 what和whatever作为引导词来引导从句，它们之间到底有什么异同点？what只能引导名词性从句 ，如主语从句、宾语从句、表语从句和同位语从句，whatever既可以引导名词性从句，又可以引导让 步状语从句。 一、what引导名词性从句 what引导名词性从句时，可在主语从句、宾语从句、表语从句和同位语从句中充当成分，其意思 主要有以下两种：一是含有疑问含义，表示“什么……”；二是相当于“名词/代词+关系代词引导的 定语从句”结构，意为“……的事情/东西/样子/颜色”等。 下面我们看看what在句中的意思以及相应的句子转换。 1. I have tried my best to do what I can to help him. 为了帮助他，我已经尽我的最大努力去做我所能做的事情。 what引导宾语从句，在句中相当于the thing that。 2. Before a problem can be solved，it must be obvious what the problem is. 在解决问题前，我们必须要弄清楚问题是什么。 it 为形式主语，what引导主语从句，且在从句中作表语，what在句中意为“什么”，表示疑问 。 3. Do you have any idea what is actually going on in the classroom？ 你知道教室里正在发生什么事情吗？ what引导同位语从句，此处what也表示疑问，意为“什么”，且what在从句中作主语。 4. —Are you still thinking about yesterday’s game？ —Oh，that’s ____. A. what makes me feel excited B. whatever I feel excited about C. how I feel about it D. when I feel excited
常见名词性从句最全总结
常见名词性从句最全总结 一、初中英语名词性从句 1．______ will be in charge of the meeting has not been decided yet. A. What B. Which C. That D. Who 【答案】 D 【解析】【分析】句意：谁将负责这次会议还没有决定。______ will be in charge of the meeting是一个主语从句，从句中缺少主语，指人，故选D。 【点评】考查名词性从句，本题涉及who引导的主语从句。 2．It________that the road will be closed tomorrow for repairs. A. was announced B. has been announced C. had been announced D. would be announced 【答案】 B 【解析】【分析】本题考查动词的时态和语态。题干句子中that到句子结束是宾语从句，且从句动词用“will＋动词原形”表示将来，由此推断出空白处谓语动词应用现在的某种时态，在所给四个选项中，只有B项正确。 【点评】考查现在完成时的被动语态，其结构是have/has +been +done。需要注意宾语从句的时态。主句用现在时，从句所需的任何时态。 3．Has it been announced ______? A. when are the planes to take off B. that are the planes to take off C. where are the planes to take off D. when the planes are to take off 【答案】 D 【解析】【分析】句意: 飞机什么时候起飞已经宣布了吗？此处是when引导的主语从句，且要用陈述句语序，故选D。 【点评】考查名词性从句，it作形式主语，关系副词when引导的从句作真正的主语。 4．Located between the 16th and the 18th floor, ______ I call my “home” is more like a “bird's nest”. A. which B. that C. what D. where 【答案】 C 【解析】【分析】考查主语从句。What引导主语从句______ I call my “home”且 What在从句中充当call的宾语。故选C。 5．They lost their way in the forest, and ___ made matters worse was that night began to fall. A. it B. which C. that D. what
名词性从句用法详解
高一语法专题：名词性从句 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） 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。 That 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。 1）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引导的主语从句：常置于句首，表示“是否”之意；
Whether he can finish his task on time is of great importance. 他是否能按时完成任务非常重要。 Whether you can succeed or not depends on how hard 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。常见的连接代词有who, whom, whose, what, which, whoever, whomever, whatever, whichever。 What we should do with the problem is undecided. 我们如何处理这个问题还未作出决定。（what引导主语从句，不表疑问意义） Whom the letter was from is still unknown.
名词性从句知识点梳理及经典练习(超详细)
名词性从句知识点梳理及经典练习(超详细) 一、名词性从句 1． ---- Let's send him home. Do you know _________? ---- I have no idea. A. where does he live B. where he lives C. he where lives D. he lives where 【答案】 B 【解析】【分析】句意:----让我们把他送回家。你知道他住在哪里吗?----我不知道。宾语从句就是一个句子作动词或介词的宾语。宾语从句由特殊疑问句变来就用原来的疑问词作引导。在宾语从句中只能使用陈述句语序，不能用疑问句语序。所以选B。 2． is clear to the members of the committee is that the President will not give in to their demands. A. Who B. It C. As D. What 【答案】 D 【解析】【分析】句意：委员会成员清楚的是，总统不会向他们的要求让步。that the President will not give in to their demands.这个句子作表语； is clear to the members of the committee这是主语从句，这里缺少主语从句的连接词，并且连接词在句中作主语，it是代词，不是了；连接词，故排除B；as作主语时，是在定语从句中，故排除C；who指人，根据表语指的事情，不是人，故排除A；what在主语从句中可以作主语或宾语，指事，符合句意，故选D。 【点评】考查名词性从句，本题涉及what引导的主语从句。 3． is even more important is the earth cooled down, water began to appear on its surface. A. When; that; when B. What; whether; as C. What; that; as D. lt; whether; as 【答案】 C 【解析】【分析】这题考查从句的用法，第一空填what引导主语从句，在主语从句中what做主语，第二空填that引导表语从句，在表语从句中，as是引导时间状语从句，句意是：甚至更重要的是：随着地球的冷却，水开始出现在表面。选C。 4．In the past decade, our education system too much on grades. However, grades have a direct connection with future success is still a question. A. focused; whether B. focused; if C. has focused; whether D. has focused; if 【答案】 C
名词性从句用法详解
名词性从句用法 一、概念 名词性从句，即指____________________ 的从句，它包括__________ 、__________ 、__________ 和__________ 。 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。 二、名词性从句的一般引导词 1. 连接词______只起______作用，及____________，也不____________，在______中可______，但引导其他名词性从句时通常______。如： I hope______ you enjoy your holiday. ______ he likes you is very obvious. 2.连接词______也不充当句子成分，但有自己的意思，表示“是否”；引导____________时，可换成______，但引导其他名词性从句时不能换成 if。 He asked ____________ I would show him the way. ______ it will do us harm remains to be seen. 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______ she wanted to leave. ______ we arrive doesn't matter. Tell me ______ one you like best. 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。如： The question is______we should carry out the plan. ______she’ll be back depends much on the weather. ______ he did it will remain a puzzle forever. 三、名词性从句的重要引导词 1.______可引导______从句、______从句和______从句，但不用于引导______从句。 它引导的名词性从句有两个意思是：一是表示“什么”，带有疑问意味； 二是表示“…所…的”，相当于一个先行词后接一个关系代词。
what引导名词性从句的五种用法
what引导名词性从句的五种用法(高考语法要点) 注意：请你在what引导的从句下面划线，并指出其充当的成分。 一、用法归纳 1. 表示“……的东西或事情”相当于the things that…：例如： They’ve done what they can to help her. 他们已经尽力帮助了她。 He saves what he earns. 他赚多少，积蓄多少。 What Mary is is the secretary. 玛丽的职务是秘书。 2. 表示“……的人或的样子”相当于the per son that…。如： He is no longer what he was. 他已经不是以前的那个样子。 He is what is generally called a traitor. 他就是人们通常所说的叛徒。 Who is it that has made Fred what he is now? 是谁把弗雷德培养成现在这个样子的？ 3. 表示“……的数量或数目”相当于the amount/number that…。如：： Our income is now double what it was ten years ago. 我们现在的收入是10年前的两倍。 The number of the students in our school is ten times what it was before liberation. 现在我校学生的数量是解放前的10倍。 4. 表示“……的时间”相当于the time that…例如： After what seemed like hours he came out with a bitter smile.似乎过了几个小时他才苦笑着出来。 The young girl was too frightened to speak, standing there for what seemed like hours. 小女孩吓得不敢说话，在那儿站了几个小时。 5. 表示“……的地方”相当于the place that…。如： This is what they call Salt Lake City. 这就是他们称为盐湖城的地方。 In 1492, Columbus reached what is now called America. 1492年哥伦布到达了现在所称的美洲大陆。 What is now the North Sahara Desert was once a civilized world. 现在的撒哈拉沙漠的北部曾经是一个文明世界。 二、用法说明 (1) 这样用的what相当于“先行词+关系代词”，所以其前不能有先行词： 你喜欢什么就拿什么吧。 正：You can have what you like. / You can have everything (that) you like. 误：You can have everything what you like. (2) 有时what 可用作限定词，其后修饰一个名词： I gave him what books I had. 我把我所有的书都给他了。
英语语法名词性从句用法小结
英语语法名词性从句用法小结 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. 名词性从句的连接词 引导名词性从句的连接词可分为四类： 1. that（无含义，不充当成分） 2. whether, if（有“是否”的含义，但不充当成分） 3. 连接代词：what, whatever, who, whoever, whom, whomever,whose, which,whichever. （在从句中做主语、宾语、表语和定语） 连接副词：when, whenever,where,wherever, how, however,why（在从句中做状语） 4. as if,as though,because（不充当成分，在名词性从句中只引导表语从句） 二. 四类名词性从句语法要点 1.主语从句 在整个句子中用作主语的从句叫主语从句。 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。 it 作形式主语：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。 It is clear that he is innocent in the accident. 很明显，他在这场事故中是无辜的。 2. 宾语从句 在整个句子中用作宾语的从句叫宾语从句。 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。 it 作形式宾语：在“主语+谓语+宾语+宾补”的句型中，如果宾语是从句的形式，则必须 用it 做形式宾语，把真正的宾语即宾语从句置于句末。 We found it impossible that the so much work will be finidhed in one day. 我们发现一天之内完成这项工作不可能。 3. 表语从句 在整个句子中用作表语的从句叫表语从句。 The fact is that we have lost the game. 事实是我们已经输了这场比赛。 That is why he didn’t come t o the meeting.