名词性从句—— 主语从句、宾语从句、表语从句、同位语从句档
高中英语语法讲义——名词性从句(主从、表从、宾从,同从)
高中英语语法讲义---- 名词性从句（主从、表从、宾从，同从）1，陈述句做名从用连词that + SV, that 表主句肯定从句完整，不做成分。
主从可用it 做形式主语，宾从第一个that 可省略。
You study hard.主从：That you study hard is known to us.= It is known to us that you study hard.表从：My opinion is that you study hard .宾从：I think (that) you study hard. …and that (不能省略)….同从：My opinion that you study hard is known to us. *比较同从和主从！●一般抽象名词后对其进行解释和说明的完整句子就是其同位语从句，不完整就是定语从句。
I appreciate your idea that we have an exam every week. （that后完整—同从）I appreciate your idea that you came up with last time.（that后不完整---定从）2，一般问句做名从用连词whether(是否) + SV，whether表主句不肯定从句完整，宾从中可用if（介词后或宾从后有or not时只用whether）。
Does your friend like English ?主从：Whether your friend likes English isn’t clear .=It isn’t clear whether your friend likes English.表从：My question is whether your friend likes English.宾从：I don’t know whether/ if your friend likes English.同从：My question whether your friend likes English isn’t clear.3, 特殊问句做名从用疑问词（连词）+ SV, 疑问词做主语时直接+谓语。
名词性从句完整版经典实用
(2)It +be+形容词 (necessary/natural/wonderful/likely/strange/important/certain等 )＋that从句
eg.It is wonderful that all of you have passed the difficult exam.
•名词性从句完整版
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误：If Mary really heard him is really doubtful. 正：Whether Mary really heard him is really doubtful. 正：It was doubtful if /whether Mary really heard him.
•名词性从句完整版
⒈连词：引导从句但不作任何成分。
⑴that—没有意义，引导主/宾/表/同位语从句。 ①It is said that there will be a party tonight. ②They say (that) there will be a party tonight. ③Why he failed was that he made a vital mistake. ④The key that he succeeded lied in his hard work. ⑵if—是否，引导宾语从句，主语从句。
2 It was a pity that you failed in the exam.
•名词性从句完整版
用it 作形式主语的结构
• It＋be＋名词(短语)(a pity/a shame/a surprise/no wonder等)＋ that从句
ห้องสมุดไป่ตู้
eg. It is a pity that you have missed the wonderful lecture.
名词性从句的定义
名词性从句(Noun Clauses)定义：包括主语从句、宾语从句、表语从句和同位语从句。
一.主语、表语、宾语、同位语中：从句一律用陈述句语序,即主语在前,谓语在后【考点1】除（what is the matter……? / what is wrong……?）在名词性从句中,除了关联词要提到句首之外,一律要用陈述句语序二.主语从句：主语从句就是在复合句中作主语的名词性从句，为避免主语冗长,句子头重脚轻,经常用it 作形式主语,主语从句放在后面作真正的主语【考点2】it作形式主语用法用 it 作形式主语的that- 从句有以下四种不同的搭配关系：a.it is +形容词 / 名词+that主语从句(should) +do1)表示动作重要性的形容词和名词,其后的that 从句用(should)+动词原形It is important / necessary/ essential/… that…It is suggested (requested, proposed,desired, etc.) that...2)表示对已知的或已提到的事作出判断和反应的形容词和名词,其后从句用(should)+动原It is a pity (a shame, no wonder, etc.) that...It is strange/astonishing /natural that …b. It + be + -ed 分词+ that-从句It is believed/known to all /has been decided that…人们相信/众所周知/已决定c. It +不及物动词+ that-分句It appears/happens/seems that…似乎/碰巧/我突然想起【考点2补充】：形式宾语的用法b.it 作形式宾语1)make /find/ feel / consider / think it + adj / n + that… / to do…2)it 用于指代后面从句所叙述的内容时，常用于这些动词后:like/dislike/love/hate /appreciate, it 后常直接跟if 或when从句3) depend on it that…对…不疑;指望…4) See (to it ) that…务必…留意…三．宾语从句【考点3】that的省略Ⅰ由that引导的宾语从句(that 通常可以省略),⑴：由连词and连接的两个（或以上）由that引导的宾从中,只有第一个that 可省略.⑵：that放在句首一般不省略。
名词性从句的种类与作用
名词性从句的种类与作用名词性从句是指在句子中充当名词的句子成分，它能够承担名词所具有的各种功能，如主语、宾语、表语、同位语等。
名词性从句的使用可以使句子更加丰富，表达更加准确。
本文将介绍名词性从句的种类及其作用。
一、主语从句主语从句是名词性从句的一种常见形式，它在句子中充当主语的角色，起到句子的主题和核心的作用。
主语从句通常以“that”或“whether”引导。
例如：1. That he is a talented musician is well known to everyone.2. Whether she will come to the party is still uncertain.主语从句常常用于强调句和形式主语的表达中，使句子更加生动有力。
二、宾语从句宾语从句作为动词的宾语出现，可以回答“what”、“where”、“which”、“who”等疑问词引导的问题。
它常见于及物动词后，也可用于介词后。
例如：1. She asked me what I wanted for dinner.2. He told me where he had been yesterday.宾语从句的作用是充当动词的宾语，使句子更加完整，表达更加准确。
三、表语从句表语从句用来修饰名词或代词，充当表语的角色，常以“that”或“whether”引导。
表语从句通常出现在“be”动词后或感官动词后。
例如：1. The question is whether we should go or stay.2. His wish is that he could travel around the world.表语从句可以在句中起到进一步解释、说明或补充的作用，使句子更加丰富多样。
四、同位语从句同位语从句指的是对名词或代词进行解释、说明或补充的句子，常见于名词后面，起到进一步解释名词的作用。
同位语从句通常以“that”引导。
名词性从句有哪些
名词性从句有哪些名词性从句共有四种，分别是主语从句（整个从句在主句中做主语），表语从句（整个从句在主句中做表语），同位语从句（整个从句在主句中做同位语），宾语从句四类（整个从句在主句中做宾语）。
名词性从句有哪些1、主语从句例如：It + be + 形容词/名词/动词过去分词 + that 从句It is strangethat he knows nothing about it.从句：He knows nothing about it.主句：It is strange something (= He knows nothing about it).连接词在从句中是否充当成分：否连接词是否可省：否2、宾语从句例如：that 引导的宾语从句I think that English is important.从句：English is important.主句：I think something (= English is important).连接词在从句中是否充当成分：否连接词是否可省：是3、表语从句用法和结构同宾语从句，区别在于：系动词后面所接的从句为表语从句，而及物动词后面所接的从句为宾语从句。
例如：- that 引导的表语从句The truth is that English is important.从句：English is important.主句：The truth is something (= that English is important).4、同位语从句同位语从句就是在复合句中作名词的同位语的名词性从句。
同位语从句对于名词进一步解释，说明名词的具体内容，一般由that引导，同位语从句有时可以不紧跟在它所说明的名词后面，而是被别的词隔开。
高考英语一轮复习——名词性从句(附答案)
高考英语一轮复习——名词性从句（附答案）I. 考点分析名词性从句包括：主语从句、宾语从句、表语从句、同位语从句，多由连词that，wh- 疑问词或由what，whatever等关系代词引导，其中同位语从句在高考考试中最常见。
1. 主语从句1) 主语从句在句子中充当主语，句子的谓语动词用第三人称单数。
如：Why he refused to work with you is still mystery.Whoever comes is welcome.2) 主语从句前的that不能省略，仅起连接作用，有时为了保持句子平衡，that从句后置，而由it作形式主语。
如：That he became a lawyer may have been due to his mother’s influence.It is not true that he has moved to New York.2. 宾语从句在句子中充当宾语，如：I don’t know where the sound came from.Don’t be satisfied with what you have achieved.3．当从句放在系动词be, look, remain, seem等后即构成表语从句。
The trouble is that I have lost his address.It seemed that the night would never end.4. 1) 同位语从句是对与之同位的名词中心词作进一步解释，能接名词性从句的常见名词有: idea, fact, news, belief, hope, evidence, opinion, problem, truth, answer, proposal, theory, decision, discovery, problem, thought, understanding 等。
高三名词性从句---主语从句,表语从句,宾语从句,同位语从句
精锐教育学科教师辅导讲义学员编号：年级：高三课时数：3学员姓名：辅导科目：英语学科教师：授课类型C(名词性从句简述) C (主语从句，表语从句) C (宾语从句，同位语从句) 授课日期及时段教学内容一、专题知识梳理一、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）。
1）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。
2）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。
主语从句What he wants to tell us is not clear.宾语从句He has told me that he will go to Shanghai tomorrow.名词性从句表语从句The fact is that we have lost the game.同位语从句I have no idea when he will come back home.1. 这里重点强调一下同位语从句，顾名思义，所谓同位语从句就是一个句子与主句中某一个名词互为同位语！那么什么是同位语呢，很简单就是相同地位，相同成分，平起平坐，A(名词)=B（从句）, B（从句）=A（名词）, 去掉任何一部分（A/B）对整个句子都不影响。
2. 而且与从句互为同位语的名词一般为抽象名词，例如：advice、demand、doubt、fact、hope、idea、information、message、news、order、problem、promise、question、request、suggestion、truth、wish、word等。
二、引导名词性从句的连接词1.引导名词性从句的连接词可分为三类：1.连词：that（无任何词意）whether, if（均表示“是否”）as if ,as though（均表示“好像”，“似乎”）以上在从句中均不充当任何成分2. 连接代词：what, whatever, who, whoever, whom, whose, whichever, whomever3. 连接副词：when, where, how, why, how many, how much, how often2. 连接词的判定：根据连接词在从句中所做的不同的成分，我们可以归纳如下：人物主语：who what宾语：whom what名词性从句表语：whom what定语：which what whose状语：when where why how (how many, how much, how often)不做成份：that if/whether as if /as though二、专题过关(一）：1._______ you don't like him is none of my business.2.When asked ____ they need most , the kids said they wanted to feel important and loved.答案：1.That 2. what(二）：______ the meeting will be held in Beijing is not known yet.What the doctors really doubt is _____my mother will recover from the serious disease soon.答案：1.Whether 2. whether(三）：It was ordered that all the soldiers _______to the front.(send)We are all for your proposal that the discussion _______.(put off)答案：1. (should) be sent 2. (should) be put off三、学法提炼1. 从句子结构入手，首先分清楚简单句和复合句。
名词性从句形容词性从句副词性从句的语法知识点
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）。
以下是一些基本的从句的语法知识点A、定语从句专项讲解与训练一、定语从句概念定语从句（attributive clause），顾名思义，就是一个句子作定语从属于主句。
定语一般是由形容词充当，所以定语从句又称作形容词从句。
另外，定语从句是由关系代词或关系副词引导的，故又称作关系从句。
定语从句一般放在它所修饰的名词或代词之后，这种名词或代词被称作先行词。
请看示例：The woman who lives next door is a teacher.先行词定语从句在所有的从句中，算定语从句最难掌握，因为汉语里没有定语从句，汉语里只有定语，而且总是放在名词之前来修饰名词。
二、关系代词引导的定语从句关系代词代替前面的先行词，并且在定语从句中充当句子成分，可以作主语、宾语、定语等。
常见的关系代词有：who, that, which。
它们的主格、宾格和所有格如下表所示：格先行词主格宾格所有格人who whom whose物which whichwhoseof which人、物that that —（一）关系代词who, whom和whose的用法who代替人，是主格，在定语从句中作主语。
例如：An architect is a person who designs buildings. 建筑师是设计房屋的人。
I will never forget the teacher who taught us chemistry in the first year of my senior middle school. 我将永远不会忘记在高一时教我们化学的那位老师。
Anyone who wants to apply for this job must send us the resume by email first. 想应聘这个职位的任何人都必须先通过电子邮件向我们发送简历。
定语从句、状语从句和同位语从句
复合句【语法要点】复合句是由一个主句加一个或几个从句所构成的句子。
从句只用作句子的一个成分，不能独立。
根据从句在句子中的作用，可分为名词性从句、定语从句和状语从句三类。
（一）名词性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。
其关联词有连接词that、if、whether；疑问代词who、what、which和疑问副词when、where、how、why等。
1.名词性从句句法结构：2.名词性从句的其它用法：1）if不能引导表语从句。
连接代词who、what、whose、which不能引导同位语从句。
2）有时as、as if/though、because也可以引导表语从句，能跟表语从句的谓语动词一般为系动词be、seem、look等。
例如：Things are not always as they seem to be.事情并不总是像表面上看来的那样。
It looks as if it were going to rain. It is because you eat too much.3）介词宾语不可以用which来引导，而要用what来引导。
例如：We can learn what we did not know. He will talk to us about what he saw in the .4）连词that引导的名词性从句除能用在except、but、in后之外很少作介词的宾语，。
其它一些介词的宾语从句如果由连词that引导，则需用it先行一步作形式宾语。
例如：He is a good student except that he is careless.You may depend on it that they will support you.5）若主句谓语动词是及物动词make、find、think、see、hear等，则把宾语从句置于宾语补足语之后，用it作形式宾语。
高二英语名词性从句
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。
Whichever (of you) comes in first will receive a prize. （你们之中）哪一个最先到 达将得到奖品。
3) 连接副词when（什么时候）； where（在 什么地方）； wherever（无论哪里）； why （为什么）；how（怎样）以及与how 组成 的短语how long（多长时间）； how often （每隔多久）； how soon（多久以后）； how far（多远）；how many /how much （多少）等
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。
2) 连词whether 或if（是否）whether 可与if互换。 但如果做介词的宾语时，或是宾语从句提置句首时 只能用whether,不能用if引导这个宾语从句。 Eg. I’ll go to that shop and see whether/if they have a telephone. Everything depends on whether you have enough money. Whether he is an expert, I don’t mind. 如果whether 后紧跟or not, 不能用if; whether 与or not分开，可用if. Eg. They doubt whether or not Jack is a good student. They doubt whether/if Jack is a good student or not.
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。
名词性从句的种类和名词性从句在句子中的位置和作用
名词性从句的种类和名词性从句在句子中的位置和作用名词性从句是指在句子中充当名词的从句。
它可以在句子中作主语、宾语、表语、同位语以及介词宾语等成分。
名词性从句的种类有主语从句、宾语从句、表语从句和同位语从句。
本文将探讨这些种类的名词性从句在句子中的位置和作用。
一、主语从句主语从句作为句子的主语，用来说明或代替整个句子的主语。
在句子中的位置通常位于句首，构成句子的主干。
例如：- What she said is true.（她说的是真的。
）- Whether he will come is uncertain.（他是否会来还不确定。
）主语从句的作用是引起谓语动词的形式变化或者句子的倒装，使句子结构更加灵活。
二、宾语从句宾语从句用来作谓语动词的宾语，通常用来回答“什么”或“怎样”的问题。
它位于及物动词、介词或感叹句中。
例如：- I know what you did last summer.（我知道你去年夏天做了什么。
）- He asked me how I was feeling.（他问我感觉如何。
）宾语从句在句子中的作用是完善句子的意思，使之更加完整和具体。
三、表语从句表语从句用来作为系动词的表语，说明主语的身份、特征、状态或性质。
在句子中的位置位于系动词之后。
例如：- The fact is that he failed the exam.（事实是他考试没通过。
）- Her wish is that everyone gets along.（她的愿望是大家和睦相处。
）表语从句的作用是扩展系动词的真实性，使句子更具说服力和表达能力。
四、同位语从句同位语从句用来解释或补充名词或代词的意思，常常出现在名词的后面，并且句子的意思与前面的名词或代词密切相关。
例如：- The news that she won the prize made me happy.（她获奖的消息让我很开心。
）- His belief that hard work pays off is inspiring.（他关于勤奋会有回报的信念很鼓舞人心。
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。
名词性从句完整版
㈡名词性从句的连接词
连接词即引导名词性从句的关联词，包括 连词、连接代词、连接副词。 连词：仅起连接作用，不作句子成分。 连接代词：可作主语、宾语、表语或定语。 连接副词：只作状语。
⒈连词：引导从句但不作任何成分。 ⑴that—没有意义，引导主/宾/表/同位语从句。 ①It is said that there will be a party tonight. ②They say (that) there will be a party tonight. ③Why he failed was that he made a vital mistake. ④The key that he succeeded lied in his hard work. ⑵if—是否，引导宾语从句，主语从句。 whether—是否，引导主/宾/表/同位语从句。 ①I doubt if/whether you can pass the test. ②Whether we’ll go camping depends on the weather. ③My doubt is whether you can pass the test. ④I have no idea whether you can pass the test.
主语从句中应注意的问题 1）主语从句在句首时，必须由连接词引 导，不能省略这些连接词。 误： The college will get in more new students this year is ture. 正：That the college will get in more new students this year is ture. 2)如果主语从句放在句首，不能用if引导， 但是如果用it 做形式主语，而把主语从句 放在句末时，也可以用if引导.
同位语、表语、宾语、定语,状语从句分类概要
When he will be back depends on the weather. Where we shall hold the meeting will be discussed at today’s meeting. Why he didn't come here is not clear to anyone.
Whoever wants to reach a distant goal must take many small steps.
Whoever dares wins. Whoever seeks obtains. Which way you turn is up to you. Which girl you choose to be your girlfriend is
2.由连接代词who, whose, which, what引导的主语从句.
Which answer is right isn’t known to us. Who damaged the computer is not yet known. Who is to be sent there hasn’t been decided. Whose plan is better has not been discussed.
回答问题的学生）
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）
❖ 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。
名词性从句
S+V Everybody laughed.S+V+A We laughed happily.S+V+O I want a ticket.S+V+O+O He lent me his car.S+V+C The man is a teacher.S+V+O+A We speak English fluently.S+V+O+C We selected him monitor.名词性从句——主语从句、宾语从句、表语从句、同位语从句名词性从句是由if, whether, that 和各种疑问词充当连接词所引导的从句，其功能同名词一样。
一．主语从句主语从句是在复合句中充当主语的从句，通常放在主句谓语动词之前或由形式主语it代替，而本身放在句子末尾。
1. It 作形式主语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。
例如：It is a pity that you did not go to see the film.It doesn’t interest me whether you su cceed or not.2. 用it 作形式主语的结构(1) It is ＋名词＋从句It is a fact that … 事实是…It is an honor that …非常荣幸It is common knowledge that …是常识(2) it is ＋形容词＋从句It is natural / important that… 很自然…It is strange / surprising / a pity that…should do 奇怪的是…(3) it is ＋不及物动词＋从句It seems that… 似乎…It happened that… 碰巧…It occur to sb. thatIt matters thatIt is likely that(4) it ＋过去分词＋从句It is reported / said / that… 据报道…It has been proved/ turned out that… 已证实…3. 由连词that 或者whether引导的主语从句：这种情况下that 和whether只是引导作用不担当成分，不能省略，并且可以转变成it形式主语。
高中英语教资语法点-从句
名词性从句 Noun clause（包括主语从句、宾语从句、表语从句和同位语从句）定义：A noun clause is a dependent clause that acts as a noun in a sentence. Noun clauses will contain a subject and a verb, but they cannot stand alone in a sentence. It must always be paired with a main clause.1.主语从句 subjective clause定义：A noun clause is a clause that plays the role of a noun. We use it as subject placeholder.结构：(1)主语从句（subject clause）+谓语（predicate）例句：what she said is right.(2)It 形式主语（formal subject）+谓语（predicate）+主语从句例句：It is important to arrive on time.2.宾语从句 objective clause定义：objective clause is clause that acts as an object in a sentence. It often follows a verb. 结构：{subject} + {verb} +(that可省略)+ {object clause}例句：I know (that) he is lying.I didn’t realize (that) I was late.3.表语从句 predicative clause定义：A predicative clause is a clause that follows a linking verb（系动词）and describes the subject of the sentence. It may be introduced by conjunctions such as that, whether, as, because, A predicative clause may be introduced by conjunctions（连词）, such as that, whether, as, as if, because, or connectives (连接词). Connectives many be conjunctive pronouns (连接代词)(who, whom, what, whose, which, whoever, whatever) or conjunctive adverbs (连接副词) (where, wherever, when, whenever, how and why).结构：Subject+ linking verb+ predicative clause例句：The regulation was that the first examination should be done in writing.Our proposal is that you should join in.Their suggestion was that no one should interfere.注：if不能引导表语从句。
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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.
二、 wh- 从句做宾语
1、做动词宾语
I can’t imagine what made him say it.
what做宾语从句主语，不能用that
2、做介词宾语
It is said that they have won the game. = They are said to have won the game
People say that he will go to America.
It is said that he will go to America.
注意：主语为reason时，表语从句用that；主语为it, this, that, 用because
The reason why she was late this morning was that she missed the early bus.
That was because she had been ill.
2) It + be + n. + that从句
It was a pity that you missed the lecture.
常用名词：common knowledge, a fact, a pity, a shame, a surprise, no wonder
3) It + be + 过去分词 + that从句
Here is a copy of what I said.
I’m surprised at what he said.
3、做形容词宾语
I’m not sure why she refused the invitation.
三、 宾语从句注意事项
1、that可省略，但in that, except that, but that除外
I don’t know what the boy is.
6、whether引导的从句可充当介词宾语，if不行。介词 + whether…
表语从句
一、 that从句做表语，that不能省略
The truth is that he is very shy.
The fact is that he is ill.
同位语从句
We must face the fact that we have spent all our money.
1、that从句做同位语，that不能省
I have no doubt that he will win the game.
注意：有时同位语从句被其他词隔开
Word (news) came that they had won the game.
take it for granted that 认为……是理所当然的
I take it for granted that he should help me.
see to it that 务必……；一定注意到 (=make sure that)
Please see to it that you should close the door before you leave the room.
We find (that) it is important that we learn English well.
4、用在双宾语动词后面
He has shown us that he is worthy of trust.
Show sb that tell sb that
5、用it做形式宾语的固定结构
注意：I don’t know what was wrong/ the matter with the machine.
I don’t know what is the matter with him.
I don’t’ know what the matter is with him. 错误
我认为他不是一个坏学生
4、Could you tell me ……? 比Can you…… 语气婉转，从句谓语动词时态根据实际需要。
5、宾语从句用陈述语序
Please explain why this is impossible.
Nobody can tell when she will arrive.
1、可用it做形式主语
Who will leave for Beijing hasn’t been decided.
= It hasn’t been decided who will leave for Beijing.
2、主语从句只用whether, 不用if
3、主语从句谓语动词用单数
3、复合宾语——用it做形式宾语，真正宾语that从句放句尾
We find it important that we learn English well.
常用it做形式宾语的动词：find, feel, think, believe, make, consider
We find it important that we learn English well.
Whether he will join us is unknown.
宾语从句
一、 that从句做宾语
1、做动词宾语
I hear that they have gone to America.
2、形容词宾语
I am afraid that you are wrong.
常用形容词： sure, certain, happy, glad, afraid, aware, eager, anxious
The teacher told us that the Pacific Ocean is the largest ocean in the world.
3、当主句有think, believe, suppose, expect, imagine动词时，宾语从句中谓语动词否定转移
I don’t think he is a bad student.
2、it做形式主语的几种句型
1) It + be + adj. + that从句
It is important that we learn English well.
常用形容词：important, necessary, obvious, clear, likely, possible, certain, true
He got up late this morning, that was why he was late.
2、wh-从句做表语
This is what he has done.
注意：表语从句只用whether，不用if
The question is whether we should start right now.
owe it to sb that 将某事归功于某人
I owe it to my parents that I have succeeded.
I owe my success to my parents.
6、that从句做介词宾语，在in, but, except之后的特殊用法
in that 因为 except that 除了 but that 如非，要不是
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2、wh-从句做同位语
I have no idea what he said.
I have no idea _why/when___ he said that.
注意：同位语从句只用whether, 不用if.
We must face the fact that he has told us.