名词性从句
名 词 性 从 句
名词性从句名词性从句包括：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：A.连词：that, whether, if（这三个词都不作从句的成分，同时，that无含义，而whether 和if都表“是否”）B.疑问代词：who, whom, whose, what, whichC.疑问副词：when, where, why, how（一）主语从句在复合句中充当主语的从句。
1.that引导主语从句that引导主语从句时不同于其他的连词，既无词义也不作成分，只起单纯的连接作用，且通常不可以省。
为了强调that引导的主语从句而置之于句首时，that不可省。
①That the driver could not control his car was obvious.②That she was chosen made us very happy.③That he will come is certain.④That he would take the risk is true.⑤That he should have married her isn't surprising.★通常，that引导主语从句时用it做形式主语，把从句置于句尾，此时that有时可省。
例如：①It was obvious that the driver could not control his car.②It made us very happy that she was chosen.③It is certain that he will come.④It is true that he would take the risk.⑤It isn't surprising (that) he should have married her.★如果以that从句为主语的句子是疑问句，就只能用先行词it结构。
名词性从句总结
名词性从句在句子中起名词作用的句子叫名词从句(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，形容词宾语等。
因此按照它在句中不同的语法功能，名词性从句又可别离称为主语从句、宾语从句、表语从句和同位语从句。
主要考查语序问题，连接词的选用，时态呼应等。
◆名词性从句的一路点：1）主句和从句之间不能用逗号隔开2）从句部份用陈述句语序◆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份连接代词：what, whatever( anything that), who, whom,whoever (anyone who), whose, which,whichever连接副词：when, where, how, why一 . 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，连接代词what，who，which，whatever，whoever和连接副词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份。
That she is still alive is a miracle.It doesn’t matter whether they will come or not.It occurred to him that he failed in the examination.What he wants to tell us is not clear.Who will win the match is still unknown.Whichever book you like would be bought for you as a present.Whatever I do is for the good of you.Whoever leaves the room last ought toturn off the lights.When we should close the shop on the holiday has not been decided.Where the meeting will be held has not yet been announced.It is known to us how he became a writer.Why he did so has not been clear.★有时为避免句子头重脚轻，常常利用形式主语it代替主语从句作形式主语，而把主语从句置于句末。
名词性从句
3) It +不及物动词+从句
It happened that...
碰巧……
It occurred to me that…我突然想起…
*_I_t _h_a_p_p_en_e_d__th_a_t___(刚好)I came into the office at that time.
*_It_o_c_c_u_r_re_d__to__m_e_t_h_a_t ___(我突然想起)I forget to sent the letter.
3. 作形容词或过去分词的宾语，例如:
I am afraid (that) I’ve made a mistake.
I am sure (that) he will win the game.
She was surprised/pleased that he had passed the exam.
The fact is that we have lost the game.
表语从句
The news that we won the game is exciting.
同位语从句
引导名词性从句的连接词可分为三类: 连接词: that, whether, if 连接代词: what, whatever, who, whoever, whomever，which ，whichever，whose. 连接副词: when, where, how, why
名词性从句
名词性从句1、名词性从句：用从句来充当句子中的名词成分。
分为：主语从句/表语从句/宾语从句/同位语从句。
名词性从句不能用逗号和主句分隔。
【补充知识】连接词：连接主句和从句的词That/whether/if/who/what/which/whatever/whichever/whoever/whomever/When/why/where2、主语从句：充当主句中主语的成分的句子称为主语从句。
（1）陈述句作主语从句：（That+从句）+谓语+其他Ex. You didn't come. It is a pity. 你错过这堂课是个遗憾→That you didn’t come is a pity. → It is a pity that you didn’t come.PS.形式主语it指代主语从句作主语，从句后置，起到平衡句子的作用。
It做形式主语和形式宾语时除了从句，还可以替代不定式或者分词结构等。
Ex. It is a waste of time playing video games.It is important to learn English.Exercise：翻译句子我上初中了是个事实。
→That I am in middle school is a fact.→It is a fact that I am in middle school.（2）一般疑问句作主语从句：（whether+从句）+谓语+其他，注意从句要改回陈述语序。
Ex. Do I know him? It is not important.我知不知道他并不重要。
→Whether I know him is not important.→It is not important whether I know him.Exercise: 合并句子Are they students? It is not clear.→Whether they are students is not clear.→It is not clear whether they are students. （3）特殊疑问句作主语从句：（特殊疑问词+从句）+谓语+其他，从句改回陈述语序。
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。
名词性从句的引导词及从属关系
名词性从句的引导词及从属关系名词性从句是英语语法中的一种从句类型，起到名词的作用。
它可以在句中充当主语、宾语、表语或同位语等成分，从而帮助完整表达句子的意思。
名词性从句的引导词是连接主句与从句的关键，不同的引导词所表示的从属关系也会有所不同。
本文将介绍常见的名词性从句引导词及其从属关系。
一、名词性从句的引导词1. that引导的名词性从句that可以引导主语从句、宾语从句、表语从句和同位语从句等。
例如：- 主语从句：That he is innocent is beyond doubt.（他的清白是毋庸置疑的。
）- 宾语从句：She believes that he will come back soon.（她相信他很快就会回来。
）- 表语从句：The fact is that he is always late.（事实是，他总是迟到。
）- 同位语从句：The news that he won the award spread quickly.（他获奖的消息迅速传开。
）2. whether/if引导的名词性从句whether和if都可以引导主语从句、宾语从句和表语从句等。
例如：- 主语从句：Whether he will attend the meeting is still uncertain.（他是否参加会议仍然不确定。
）- 宾语从句：I don't know whether/if she is coming with us.（我不知道她是否和我们一起来。
）- 表语从句：The question is whether/if she is qualified for the job.（问题是，她是否具备这份工作的资格。
）3. who/whom引导的名词性从句who和whom一般用于引导主语从句和宾语从句。
例如：- 主语从句：Who will be in charge of the project remains unknown.（谁将负责这个项目仍然未知。
名词性从句
同位语从句
在一个更长的句子中作同位语使用 的句子叫同位语从句。 同位语与其前的词或短语ct that she is ill should be considered.
同位语从句一般在下列词的后面
belief, fact, fear, hope, idea, news, problem, reason, result, possibility等。如： I have no idea when he will return.
1that 2 order / suggestion / advice / request that should We will take his advice that we should have a healthy diet Whether if I have no idea whether he will come or not
宾语从句
Now I want to know what I can do. John said that he was leaving for London on Wednesday
名 词 性 从 句
主语从句 同位语从句 表语从句 宾语从句
名词性从句动画讲解
表语从句
在另外一个句子中作表语的 句子叫表语从名。 The fact is that he has not been seen recently.
宾语从句 在另一个句子中做宾语的句子 叫宾语从句。 I worry about whether he can pass through the crisis of his illness.
名词性从句
在句子中起名词作用的句子叫名 词性从句. 分为:主语从句、宾语从句、表语 从句和同位语从句。
名词性从句
名词性从句一.什么是名词性从句？在主句充当名词通常能够充当成分的从句，叫名词性从句。
主语从句，宾语从句，表语从句，同位语从句。
What I need is a new desk.He said that he will leave for Beijing next week.His question is when the sports meet will take place.He told me a lie that he had learned five foreign languages.从以上例句中，可以看出名词性从句没有先行词。
同位语从句的情况待后面解释。
不同的从句在以后的讲解中我们会逐渐熟悉。
二．连接词。
1.That 不充当任何成分，没有任何意思，只起连接作用。
发生了这场事故是你的错。
That the accident happened is your fault.I had no idea that you were here.以上两句中，that 不可省略，只能在宾语从句中省略。
如果省略的话，句子的意思不清，句子成分也不明。
2.whether, if ( 不做句子成分，有意思，有连接作用)The question is whether the book is worth reading.Whether the pollution can be controlled depends on the effect we will make.以上两句不能用if代替whether.If 只能用于宾语从句，但不能用于介词宾语从句。
He didn’t make sure if (whether)he would take p art in the party.Everything depends on whether we have enough experience.3.连接代词或连接副词（所有疑问代词和疑问副词都可以转为连接代词或连接副词）（做句子成分，有意思，有连接作用。
名词性从句
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.（1）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.(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.（what在从句中作主语）What he will be in the future is known to us.（what在从句中作be的表语）Who will go makes no difference.How this happened is not clear.Why he did that wasn’t qu ite clear.Whether she will join us won’t make too much difference .(此处不能用if)Whoever comes will be welcome.( whoever 在名词性从句中相当于anyone who )It is possible that I may not be able to come. （it是形式主语，真正的主语是划线部分）It doesn’t seem likely that she will be here.Isn’t it strange that he should have left without telling us?It occurred to me that he had forgotten to take his notebook with him.That we need more equipment is quite obvious.Has it been announced when the planes are to take off?(2) 表语从句：用作表语的从句叫表语从句。
高中英语 名词性从句
1. if只能用在动词后的宾语从句,不能用在介词后的宾语从句 2. if 不能用在放句首的主语从句中 3. if 不能用在表语从句中 4. whether or not 连在一起引导宾语从句时不用if. 5. whether to do 做动词宾语, 不能用if to do.
happy.
A. That
B. What
C. Why
D. If
主语从句
2. I wonder ____ you will go shopping or stay at home.
A. that B. which C. whether D. what
宾语从句
3. This is _____ he was often late for school.
(what 代替said 后面接的 sth.)
（1）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___。
2. 宾语从句中的否定转移
在I/We think (believe, suppose, guess, expect)等后面 的从句中，否定转移到主句。 I don’t think he is right, __Ii_s_h_e_?__ 3. Reason 后的表语从句 The reason why he was so late was __t_h_a__t__ he missed the bus. (because/that)