名词性从句 语法讲解
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高中语法讲解—名词性从句
名词性从句1.从句的分类状语从句（分9种）从句主语从句名词性从句宾语从句表语从句同位语从句2.说明：①名词性从句的功能相当于名词，根据其在句中充当的成份，有不同的叫法。
②引导名词性从句的词语主要有：a.从属连词that，无词义，不作句子成分；b.从属连词if，whether（是否）有词义，但不作句子成分；c.从属连词as if（=as though，似乎、好像）有词义，但不作句子成分；d.连接代词who，whoever，what，whatever，whom，whomever，which，whichever，how much，how many有词义，作成分；e.连接副词when，whenever，where，wherever，why，how，however，how often，how soon，how far，how long作句子成分。
③在名词性从句中，要用陈述语序。
【例】1.I don’t kno w where does he live.(false)I don’t know where he lives.(true) 我不知道他住在哪。
2.What life in the future will be like is unknown.(true)What will life in the future be is unknown.(false)④不可用no matter who，no matter what等引导名词性从句，只能引导状语从句。
一、主语从句1.定义：若处在主语的位置上是个句子，那么这个句子就叫做主语从句。
2.注意事项：a.在主语从句中，任何引导词都不可以省去。
【例】That her hair is turning grey worries her.b.在主语从句中，不用if，用whether。
【例】Whether he will come or not is not clear.(true)If he will or not is not clear.(false)c.主语从句作主语时，谓语动词用单数。
语法解析名词性从句
语法解析名词性从句一、概念说明名词性从句是从句的一种，它在句中的地位和作用相当于名词。
名词性从句可以充当主语、宾语、表语或同位语。
二、主语从句主语从句用来充当整个句子的主语。
示例：1. What she said is true.（主语从句作主语）2. Whether he will come is uncertain.（主语从句作主语）3. If it rains, we will stay at home.（主语从句作主语）三、宾语从句宾语从句用来充当及物动词或介词后面的宾语。
示例：1. She asked me what my name was.（宾语从句作宾语）2. I wonder if he is coming.（宾语从句作宾语）3. He told me where he lived.（宾语从句作宾语）四、表语从句表语从句用来充当系动词后面的表语。
示例：1. The important thing is that we keep trying.（表语从句作表语）2. His wish is that everyone be happy.（表语从句作表语）3. Her dream is to become a famous singer.（表语从句作表语）五、同位语从句同位语从句用来解释或说明名词的具体内容。
示例：1. The fact that he didn't study resulted in a poor grade.（同位语从句解释the fact）2. My understanding is that we need to work together.（同位语从句解释my understanding）3. The idea that she suggested is worth considering.（同位语从句解释the idea）六、关系代词引导的名词性从句关系代词引导的名词性从句在从句中充当成分的同时，引导词也在主句中充当成分。
名词性从句语法
名词性从句语法英语语法--名词性从句讲解(一)在句子中起名词作用的句子叫名词从句(Noun Clauses）。
名词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1. 连接代词：who， whose， whom， what， which.有词义，在从句中担任成分。
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在从句中不担任成分，有时可省略；二. 具体分类1、主语从句作句子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。
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。
高中名词性从句语法精讲详解
高中名词性从句语法详解名词性从句：宾主同表（宾从，主从，同从，表从）一、宾语从句宾语从句的类型（1）主语+谓语+宾语从句He said that he wouldn’t take part in the sports meeting.（2）主语+be+adj+宾语从句I’m sure that our team will win.☆只限于少数adj. sure, certain, afraid, confident, etc（3）主语+谓语+宾（表）语+介词+宾语从句（except, in that在于，因为）He is a good student except that he is a little careless.I like the city,but I like the country better in that I have more friends there1. 宾语从句的连接词1）连词that,只起连接作用,在从句中不作句子成分,也无词汇意义,在口语中常被省略★由that 引导的宾语从句在以下情况下不能省略：(1).在主+谓+it(形式宾语)+宾补+that从句(真正宾语) 的句型中：表喜欢、憎恶等心理活动的动词或词组后习惯上先跟形宾it：hate, love, enjoy, dislike, don’t mind, feel like, appreciate, rely/depend on, count on, see to, take, owe等We must make it clear that we mean what we say.We heard it that she would get married next month.(2).由and连接的两个由that引导的宾语从句中,第二个that 不省略.He told me (that) he would come and that he would come on time. (3) 从句前有插入语：He may tell you, for example, that she is interested in Chinese(4）从句主语是that时：He says that that is a useful book(5)当that从句是双宾语中的直接宾语时，that不可省。
名词性从句_语法讲解
单个的主语从句作主语时，谓 语动词用单数形式。如果是两 个或两个以上的主语从句作主 语，谓语动词则用复数形式。 Where and when he was born has not been found. When the person was murdered and why he was murdered are still unknown.
I
名词性从句的种类
• 1.When we will start is not clear.
主语从句
• 2.Mrs Black won’t believe that her son has become a thief. 宾语从句
• 3. My idea is that we should do it right now. 表语从句 • 4.I had no idea that you were her friend.
宾语从句
在复合句中作主句的宾语,放在实义动词或介词的后 面.引导词有连词that (that 常可省略),whether, if; 代词有who, whose, what ,which; 副词有when ,where, how, why 等.如:
We believe (that) he is honest.
(4)用if不用whether的情况:
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 \ essential that…. It’s important that…. It’s natural that…. It's strange that …
同位语从句
高中英语名词性从句语法讲解
This is why Sara was late for the meeting.
This is how they overcome the difficulties.
My strongest memory is when I attended an
American wedding.
5. 其他连词as if, because, as, as though 引导的表语从句
C．表示某种状态的：remain, keep, prove, continue, stay等.
1. that 引导的表语从句 that 仅起连接作用，无意义，在句中不作任何成分， 通常不可省略。这种从句往往是对主句主语的内容起 进一步解释的作用。
e.g. The chance is that one smoker in four will die from
think等变为否定形式;
e.g. I don’t think you are right．
(5) 在think，believe，imagine，suppose，guess，hope
等动词以及 I’m afraid 等后，可用so代替一个一定的
宾语从句，还可用not代替一个否定的宾语从句：
e.g. 一Do you believe it will clear up你认为天气会转晴吗
连接副词：when, where, how, why 连接代词和连接副词一般做句子的某一成份
The Subject Clause
用作主语的从句叫主语从句。引导主语从句的 连接词有：
连词that, whether；
连接代词what, whatever, who, whoever, whom, whomever, whose, which,
This is how they overcome the difficulties.
My strongest memory is when I attended an
American wedding.
5. 其他连词as if, because, as, as though 引导的表语从句
C．表示某种状态的：remain, keep, prove, continue, stay等.
1. that 引导的表语从句 that 仅起连接作用，无意义，在句中不作任何成分， 通常不可省略。这种从句往往是对主句主语的内容起 进一步解释的作用。
e.g. The chance is that one smoker in four will die from
think等变为否定形式;
e.g. I don’t think you are right．
(5) 在think，believe，imagine，suppose，guess，hope
等动词以及 I’m afraid 等后，可用so代替一个一定的
宾语从句，还可用not代替一个否定的宾语从句：
e.g. 一Do you believe it will clear up你认为天气会转晴吗
连接副词：when, where, how, why 连接代词和连接副词一般做句子的某一成份
The Subject Clause
用作主语的从句叫主语从句。引导主语从句的 连接词有：
连词that, whether；
连接代词what, whatever, who, whoever, whom, whomever, whose, which,
初中英语语法专题—名词性从句讲解
初中英语语法专题—名词性从句讲解名词性从句是由连接词引导的从句，用作名词的成分，常常在句子中充当主语、宾语、表语、同位语等，起到连接主句与从句的作用。
下面就是名词性从句的不同类型及其用法：主语从句主语从句作为句子的主语部分，通常由连接词 "that" 或"whether" 引导。
例如：- That he is late is not surprising.（他迟到了并不令人惊讶。
）That he is late is not surprising.（他迟到了并不令人惊讶。
）- Whether we can win the game is uncertain.（我们是否能赢得比赛还不确定。
）Whether we can win the game is uncertain.（我们是否能赢得比赛还不确定。
）宾语从句宾语从句作为句子的宾语，通常由连接词 "that" 或 "whether"引导。
例如：- I wonder whether he has finished his homework.（我想知道他是否完成了他的作业。
）whether he has finished his homework.（我想知道他是否完成了他的作业。
）表语从句表语从句用来补充说明主语的性质或状态，通常由连接词"that" 或 "whether" 引导。
例如：- The truth is that he is a good student.（事实是他是个好学生。
）that he is a good student.（事实是他是个好学生。
）- My concern is whether he understands the instructions.（我关心的是他是否理解了这些指示。
）whether he understands the instructions.（我关心的是他是否理解了这些指示。
(完整版)高中英语语法总结-名词性从句
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。
第一节知识点讲解顾名思义，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.Tips: 主语从句的 that 绝对不能省去。
因为句子是不能做主语的，故用 that 引导。
若去掉则没有了主语，而宾语从句的 that 可省。
主语从句： That he is right is known to all of us.宾语从句： We all know (that) he is right.1.It 作形式主语和 it 引导强调句的比较It 作形式主语代替主语从句，主要是为了平衡句子结构，主语从句的连接词没有变化。
而 it 引导的强调句则是对句子某一部分进行强调，无论强调的是什么成分，都可用连词that。
英语名词性从句讲解【完整版】
1、It depends on weather if she will come back on time .
2、I asked him if he could do me a favor .
If与whether的区别：
1、If不能引导放于句首的主语从句，而whether可以。 2、引导表语从句用whether，不用if。 3、引导同位语从句用whether，不用if。 4、whether可以引导从句作介词的宾语，不用if 。 5、whether or not 连在一起可以，但if不可以。而 “whether-----or not = if -----or not”
同位语从句：
定义：在复合句中充当同位语的句子。 同位语从句用来对其前面的抽象名词进行解释说明，被解释说明的词和 同位语在逻辑上是主表关系。 同位语常见名词：fact, suggestion, advice, idea, decision, news, thought, hope, belief, truth, doubt, promise, possibility, truth, warning, message, reason, report, question，explanation, wish, problem等。 常见的连接词：that, whether, what, who, how, when, where等。 用法： The thought that I want to buy my mother a birthday gift makes me excited.that 引导的同位语从句，解释说明 thought，从句不缺成 分 There is some doubt whether he will come. whether 引导同位语从句，if 不能引导同位语从句 we haven’t made the decision where we are going to spend our vacation. 有时同位语从句可以不紧跟解释说明的名词后面。 The news is surprising that he won the match.
2、I asked him if he could do me a favor .
If与whether的区别：
1、If不能引导放于句首的主语从句，而whether可以。 2、引导表语从句用whether，不用if。 3、引导同位语从句用whether，不用if。 4、whether可以引导从句作介词的宾语，不用if 。 5、whether or not 连在一起可以，但if不可以。而 “whether-----or not = if -----or not”
同位语从句：
定义：在复合句中充当同位语的句子。 同位语从句用来对其前面的抽象名词进行解释说明，被解释说明的词和 同位语在逻辑上是主表关系。 同位语常见名词：fact, suggestion, advice, idea, decision, news, thought, hope, belief, truth, doubt, promise, possibility, truth, warning, message, reason, report, question，explanation, wish, problem等。 常见的连接词：that, whether, what, who, how, when, where等。 用法： The thought that I want to buy my mother a birthday gift makes me excited.that 引导的同位语从句，解释说明 thought，从句不缺成 分 There is some doubt whether he will come. whether 引导同位语从句，if 不能引导同位语从句 we haven’t made the decision where we are going to spend our vacation. 有时同位语从句可以不紧跟解释说明的名词后面。 The news is surprising that he won the match.
名词性从句_语法讲解
now.
表语从句
• 4.I had no idea that you were her friend.
同位语从句
什么是名词性从句?
在英语的句子结构中，本来该由名词充当的主语、宾 语、表语和同位语，由一个句子来充当,这个句子就叫 名词性从句。
主语从句 ( The Subject Clause)
名
词 宾语从句 ( The Object Clause) 性
I 名词性从句的种类
• 1.When we will start is not clear.
主语从句
• 2.Mrs Black won’t believe that her son has
become a thief.
宾语从句
• 3. My idea is that we should do it right
错误 That he will not come to the meeting this evening is true.
3).whether可以引导主语从句 解释为”是否”,但if不能.
4).whoever, whatever, whichever等词可以引导主 语从句, 但no matter who, no matter what 等不能, 它们只能引导让步状语从句.
2).连接代词: who, whom, whose, what, which, whoever, whatever, whichever
Whose bag is it ?
It can`t be told. Whose bag it 来自s can`t be told.
It can`t be told whose bag it is .
Will we visit the Great Wall tomorrow? It has not been decided.