表语从句
(完整版)表语从句详解+例句
(完整版)表语从句详解+例句表语从句详解+例句什么是表语从句表语从句是指用来作为主语或宾语补足语，并且从句中的内容对于主句来说是表达性质、特征或状态的句子。
表语从句通常由连词“是”引导，也可以由其他系动词如“看起来”，“变成”等引导。
表语从句的结构表语从句的基本结构为：“主语 + 系动词 + 从句”，从句中的内容描述或说明主句中的主语或宾语。
在英语中，表语从句的引导词通常为连词“that”，但是在口语和一些特定的语言环境中，引导词“that”可以省略。
表语从句的使用表语从句常常用于以下几种情况：2. 表示状态：She is happy that she passed the exam.3. 表示观点或看法：His opinion is that we should postpone the meeting.4. 表示推测或假设：The fact is that he must have forgotten about the appointment.表语从句的例句以下是几个使用表语从句的例句：1. The problem is that we don't have enough time to finish the project.2. His wish is that his parents would be proud of him.3. The truth is that he has been lying to us all along.4. My hope is that we can find a solution to this issue.6. The fact is that he is the most qualified candidate for the job.以上是关于表语从句的详细解释和例句。
通过学习和理解表语从句的使用，您可以丰富和提升您的英语写作技巧。
希望这份文档对您有所帮助！。
表语从句
表语从句在句子中起表语作用的从句叫做表语从句，位于主句联系动词的后面。
表语从句的引导词和主语从句的引导词相同。
也是名词性从句的一种。
一、联系动词类型1:表示状态和状态的持续, 表示某种相对静止的特征或状态如:be(是), seem(似乎), look(看起来), appear(似乎), feel(觉得), sound(听起来), smell(闻起来), taste(尝起来), keep(保持), remain(保持), stand(站立), lie(躺), stay(停留)等。
类型2:表示从一种状态转变为另一种状态, 表示某种状态的变化演变过程，如:become(变成), go(变得), get(变得), turn(变成), grow(长成), fall(变成某种状态), come(成为), run(变成)等。
补充：一些感官动词也可以作联系动词（link.v）例如：look, sound , smell, taste, feel, see, watch, hear 等。
二、表语从句引导表语从句的词有连词that, whether，连接代词what, whatever, who, whoever, whom, whomever, whose, which, whichever 和连接副词when, where, how, why, whenever, wherever, however ，关系代词型what，以及as if, as though, because等连词。
1. 由that引导My idea is that we should start making preparations right now. His sole requirement was (is) that t he system work. The trouble is that we are short of funds.The fact is that he doesn‟t really try. 事实是他没有做真正的努力。
表语从句知识点
表语从句知识点
表语从句是一种名词性从句，通常放在主句的谓语动词之后，并用逗号将其与主句分隔开来。
表语从句的构成和用法如下：构成：
连词：表语从句通常由连词引导，如that, whether, who, what, why, where, when等。
主语：表语从句的主语可以是名词、代词或者短语。
谓语：表语从句的谓语动词通常与主句的谓语动词相关联，可以是解释、说明、描述、定义、推断等。
用法：
说明主语的身份或特征：表语从句可以用来解释或说明主语的身份或特征，例如：The problem is that we don't have enough funds. (问题是我们没有足够的资金。
)
表示原因或结果：表语从句也可以用来表示原因或结果，例如：The reason why she failed is that she didn't study hard enough. (她失败的原因是她没有努力学习。
)
表达条件或假设：表语从句可以用来表达条件或假设，例如：The situation is that if we have enough funds, we can continue with the project. (情况是如果我们有足够的资金，我们就可以继续这个项目。
)
注意事项：
表语从句的主语和谓语动词必须与主句的主语和谓语动词保持
一致。
在使用连词引导表语从句时，需要注意连词在从句中所充当的成分。
表语从句通常用虚拟语气来表达语气强调，需要根据具体情况选择适当的语气。
十个简单的表语从句
十个简单的表语从句
表语从句是一个句子的组成部分，用来作为主句的表语。
它通常由连词“是”引导，可以是名词、形容词、副词、介词短语、动词不定式、动名词或从句等。
下面是十个简单的表语从句的例子：
1. 我认为他是个天才。
2. 这本书是一个最佳的礼物。
3. 天气变冷是因为冬天到了。
4. 我的理解是他不会来参加会议。
5. 这个问题是谁提出的？
6. 我的目标是成为一名优秀的医生。
7. 他的观点是我们应该更加注重环境保护。
8. 我的愿望是获得一个高薪的工作。
9. 这个地方是我度假的理想之地。
10. 她的感受是这个决定对她来说是正确的。
以上是十个简单的表语从句的例子。
这些句子中，表语从句用来描述或说明主句中的名词、形容词或动词，并起到进一步说明的作用。
通过使用表语从句，可以让句子更加丰富多样，表达更加准确清晰。
在写作中，我们可以灵活运用表语从句，使文章更加生动有趣，同时也要注意使用恰当的连接词和语法结构，确保句子的准确性和通顺性。
表语从句(经典)
表语从句一．定义：表语从句就是用一个句子作为表语。
说明主语是什么或者怎么样，由名词、形容词或相当于名词或形容词的词或短语充当，和连系动词一起构成谓语二．引导表语从句的关联词的种类：(1)从属连词that。
在从句中不做成分。
如：The trouble is that I have lost his address. 麻烦是我把他的地址丢了。
造句：原因是他上学迟到了The reason was that he was late for school.(2)从属连词whether, as, as if。
如：1. He looked just as he had looked ten years before. 他看起来还与十年前一样。
2. The question is whether they will be able to help us. 问题是他们是否能帮我们。
注：从属连词if一般不用来引导表语从句，但as if却可引导表语从句，如：All this was over twenty years ago, but it’s as if it was only yesterday.这都是20多年前的事了，但宛如昨天一样。
eg：1. 关键是我们是否能解决问题。
The key is whether we can solve the problem.2. 看起来好像要下雨。
It looked as if it was going to rain.注：能跟表语从句的谓语动词一般为系动词be, seem, look，sound等。
如：He looked just as he had looked ten years before. 他看起来还与十年前一样。
eg：听起来好像有人在敲门。
It sounds as if someone is knocking at the door.(3)连接代词who, whom, whose, what, which, whoever, whatever, whichever在表语从句中做主语、宾语等。
表语从句
例题2： B The reason why he failed is ________he was too careless. A. because B. that C. for D. because of
注意点2：
主句主语为reason, 只能用that引导表语从句， 不可用because.
注意点1：if 不能引导表语从句
C The problem is _________to take the place of John. A. who can we get B. what we can get C. who we can get D. that we can get 注意点3：
如果从句是特殊疑问句，用陈述句语序
表语从句
一.表语从句的定义
The question is difficult. 简单句 （表） The question is who will do it.复合句
（表）
表语从句
表语从句的定义： 在复合句中作表语的从句叫表语从 句。表语从句位于主句的系动词后。 表语从句说明主语是什么或者怎么样, 对主语进行解释、说明，使主语的内 具体化。
7. That is __ ___ we were late last time. A. that B. when C. why D. what 8. She looked _________ she were ten years younger. A. that B. like C. as D. as though 9.—I fell sick! --I think it is _______ you are doing too much. A. why B. when C. what D. because
表语从句超详细讲解
表语从句超详细讲解1. 表语从句的定义表语从句是指在句子中作为主语、宾语、或表语的从句。
它可以用来描述或说明主句中的主语、宾语或表语。
表语从句通常由连词that引导，但在口语中that常常被省略。
2. 表语从句的结构表语从句通常由以下几个部分构成：- 一个引导词 (that，whether)- 一个主要从句 (主句中的主语、宾语、或表语)- 一个从属从句 (用来描述或说明主句中的主语、宾语或表语) 示例：He is happy that he passed the exam.3. 表语从句的使用方式表语从句可用于以下几种情况：- 作为主语从句：- That she is late is unacceptable. (她迟到是不可接受的)- 作为宾语从句：- 作为表语从句：- The fact that she is leaving makes me sad. (她要离开的事实让我伤心)4. 表语从句的注意事项- 当表语从句中的主语与主句主语一致时，通常可以省略从句中的主语。
- 表语从句中的动词时态通常与主句保持一致，但有时也可根据具体语境进行变化。
- 在某些情况下，表语从句可以使用whether引导，表示"是否"的意思。
5. 表语从句的替代结构在一些情况下，表语从句可以使用其他结构来替代，以达到简化句子的目的。
例如：- 使用名词代替从句：- The fact that she is leaving makes me sad. (她要离开的事实让我伤心)- Her leaving makes me sad. (她的离开让我伤心)- 使用动名词短语代替从句：- It is certain that he will succeed. (他会成功是确定的)- It is certain he will succeed. (他会成功是确定的)6. 总结表语从句是一种在句子中作为主语、宾语或表语的从句，用于描述或说明主句中的主语、宾语或表语。
表语从句
引导词
(1.连接词：that / whether/as if/ as though)
Practice
她看起来很担心她父母。 She looks as if she is worried about her parents. 她看上去好像是个男孩儿。 She looks as if she were a boy.
表语的表现形式
Tom is handsome.
形容词作表语 名词作表语 介词作宾语
Tom is a doctor.
Tom is at work.
Tom’s next step is to finish it. 不定式作表语
Tom’s job is selling clothes.
动名词作表语
引导词
(2.连接代词：what / whom / whose / which / who)
连接副词除了在句中起连接作用外，还在从句中充当时间，地点， 方式，原因状语，本身具有词义。
引导词
(3.连接副词：when / where / why / how / because )
这就是为什么Tom 开会迟到的原因。
Ps：当主句的主语为reason,或者是由why引导的从句时,与它们相关的表语从句 用___that______
将下列句子合并为一句:
1. The problem is…../ how can we get the things we need The problem is how we can get the things we need 2. That is …./ I want to tell you That is what I want to tell you 3. This is.. / I live there This is where I live 4. The fact is…./ he left The fact is that he left
表语从句
特别要注意的几点
1.表语从句一定要用陈述语序。 2.because，why引导的表语从句。 He did not see the film last night. That is because he had to help his little sister with her homework. （That‘s because…强调原因） He had seen the film before. That is why he did not see it last night. （That's why…强调结果）
3.名词主语+be+that引起的表语从句 在这种句型中，常用表示事实，真理的名词， 或表示看法，观点的名词，如： fact,truth ,idea,opinion,belief,view, feeling,suggestion,plan等作主语。 如： 1.The fact is that our team has won the game. 2.The truth is that she was the very person who informed against her husband. 3. My opinion is that we should discuss it with them.
2. whether 引导的表语从句 whether起连接作用， 意为“是否、究竟、到底”
表语从句例句100句带解析
表语从句例句100句带解析（实用版）目录1.表语从句的定义和作用2.表语从句的构成3.表语从句的解析示例4.表语从句在实际应用中的重要性正文一、表语从句的定义和作用表语从句是英语语法中的一种从句类型，主要用于作为系动词（如 be, become, get 等）的表语，用以说明主语的身份、状态、特征等。
表语从句在英语中占有重要地位，掌握好表语从句的使用，对于提高英语表达能力具有重要意义。
二、表语从句的构成表语从句的构成主要包括引导词、主语、谓语和宾语等成分。
引导词通常由系动词后面的连词、副词或代词充当，如：is, are, was, were, do, did, have, has, will, can 等。
主语和谓语以及其他成分与一般句子的构成相同。
例如：The problem is that we don"t have enough time.（问题是我们没有足够的时间。
）三、表语从句的解析示例为了更好地理解和掌握表语从句，我们通过以下实例进行解析：1.That he won the game is a surprise to us all.（他赢了比赛让我们大家都感到惊讶。
）解析：表语从句“that he won the game”作为系动词“is”的表语。
2.What she said is true.（她说的是真的。
）解析：表语从句“what she said”作为系动词“is”的表语。
四、表语从句在实际应用中的重要性表语从句在英语中具有广泛的应用，尤其在口语和书面语中，掌握好表语从句的使用，可以丰富我们的表达方式，提高表达效果。
同时，对于学习英语语法、培养正确的语感和提高英语水平也具有重要作用。
总之，表语从句作为英语语法中的一种重要从句类型，对于学习和掌握英语具有重要意义。
九种英语表语从句
九种英语表语从句表语从句是一个句子，用来描述或说明主句中的主语或宾语。
它通常用来表达人的感受、状态、判断、命令等。
下面是九种常见的英语表语从句。
1. 名词从句名词从句作为主语或宾语出现，起名词的作用。
常见的引导词有 "that", "whether", "if" 等。
例如：- He believes that she is innocent.（他相信她是无辜的。
）- I don't know whether I will pass the exam.（我不知道我是否会通过考试。
）2. 形容词从句形容词从句用来修饰名词或代词，起形容词的作用。
常见的引导词有 "that", "which", "who" 等。
例如：- This is the book that I like.（这是我喜欢的书。
）- The person who helped me is my friend.（帮助我的人是我的朋友。
）3. 副词从句副词从句用来修饰动词、形容词或副词，起副词的作用。
常见的引导词有 "when", "where", "why", "how" 等。
例如：- I will call you when I arrive.（我到达时会打电话给你。
）- He explained why he was late.（他解释了他为什么迟到。
）4. 表语从句表语从句用来表示主语的状态、性质、身份等。
常见的引导词有 "that", "as if", "as though" 等。
例如：- The fact is that he is guilty.（事实是他有罪。
表语从句
表语从句：1，定义：表语从句是指在复合句中做主句表语的从句。
表语从句和主语只同一内容，它对主语进行解释、说明，是主语的内容具体化。
2，表现形式：A 由从属连词引导The clear message is that we should get moving to protect ourselves.译：传达的信息一清二楚：我们应该行动起来保护我们自己。
The reason I didn’t go to France was that I got a new job.译：我之所以没去法国是因为我找到一份新工作。
特别提示：下列表达式不规范的：The reason I didn’t go to France was because I got a new job .因为because 不能引导名词性从句。
The question is whether he works at all.译：问题在于他是否工作。
特别提示：下列表达是错误的：The question is if he works at all .因为if不能引导表语从句。
B 有连接代词引导China is not what it used to be .译：中国不再是过去的样子了。
Raw material is what we are badly in need of .原材料是我们急需的。
C 有连接副词引导The next important question we have to decide is when we have to submit the annual report.我们必须决定的下一个问题是，是么时候我们必须呈交年度报告。
Some people maintain that this is precisely where the danger lies.有些人坚持认为这恰恰是危险所在。
This is why I didn’t pass the exam.这就是我考试不及格的原因。
英语中表语从句用法及例句总结
英语中表语从句用法及例句总结
表语从句是英语语法中的一个重要部分，它通常用来作为主语补足语，说明主语的性质、状态或者身份。
下面是关于表语从句的用法和例句总结：
1. 表语从句的引导词
表语从句通常由连接词引导，其中常见的引导词有：that, whether, if。
2. 表语从句的位置
表语从句通常位于句子的主语之后，动词之前。
3. 表语从句的功能
表语从句可以起到以下几个功能：
- 表示主语的性质或状态：The fact is that he is a very talented musician.（事实是，他是一个非常有才华的音乐家。
）
- 表示主语的感受或观点：Her belief is that everyone deserves equal rights.（她的信念是每个人都应该享有平等的权利。
）
例句：
- My hope is that he will pass the exam.（我希望他通过考试。
）- The question is whether we should go or not.（问题是我们是否应该去。
）
- Her dream is to travel around the world.（她的梦想是环游世界。
）
- The fact is that he is guilty.（事实是，他有罪。
）
以上就是关于英语中表语从句的用法及例句总结。
希望对您有帮助！
Please let me know if you need further assistance.。
表语从句课件
03
表语从句的时态和语态
一般现在时态
总结词
表示现在的状态、特征、真理等
详细描述
一般现在时态的表语从句通常用于描述当前的状态、特征或普遍真理。例如，“The problem is (that) he doesn't have enough time.”（问题是他没有足够的时间。）
现在进行时态
总结词
表语从句课件
目录
• 表语从句的定义与分类 • 表语从句的引导词 • 表语从句的时态和语态 • 表语从句的省略形式 • 表语从句的常见错误分析 • 表语从句的练习与解析
01
表语从句的定义与分类
什么是表语从句
表语从句是句子中的一部分，用作名词或代词的表语， 进一步说明主语的特征或属性。
它通常位于系动词之后，如be、seem、remain等，构 成主系表结构。
要点一
总结词
在表语从句中，如果主语和be动词相同，可以省略主语和 be动词，只保留其他部分。
要点二
详细描述
例如，“The problem is that he is not honest.”这句话 中，“is”是be动词，与主语“the problem”相同，因 此可以省略为“The problem is that he is not honest.” 。
06
表语从句的练习与解析
单项选择题练习
01
总结词
考察对表语从句的理解和应用
02
详细描述
提供一系列单项选择题，每个题目包含一个句子 和一个表语从句，要求选择正确的表语从句。
填空题练习
总结词
测试对表语从句结构的掌握
详细描述
给出不完整的句子，要求填写适当的连词或从句， 使句子完整并构成表语从句。
表语从句
表语从句1.定义：表语从句就是用一个句子作为表语。
2.系动词:be, keep, stay, remain（保持）, go, turn, become（变）, look,sound,smell,taste.(感观动词)3.系动词后接形容词作表语。
The problem is puzzling.The problem is when we can get a pay rise.4.表语从句的连接词有：that, what, who, when, where, which, why,whether, how.He has become what he wanted to be ten years ago.She has remained where I stood yesterday for an hour.His suggestion is that we should stay calm.The question is when he can arrive at the hotel.5.表语从句一定要用陈述句语序。
6.不能用if，而用whether 连接表语从句。
7.表语从句不受时态的限制。
The question is who will travel with me to Beijing tomorrow.The question is why he cried yesterday.8.that在表语从句中不可以省掉。
9.“That is why...表结果；“That is because.. 表原因。
如：1)He did not see the film last night. That is because he had to helphis little sister with her homework.2)He had seen the film before. That is why he did not see it last night.例题讲解：［例1］The traditional view is ____ we sleep because our brain is “programmed” to make us do so. (2007上海)A. whenB. whyC. whetherD. that［例2］You are saying that everyone should be equal, and this is ____ I disagree. (2004)A. whyB. whereC. whatD. how［例3］— I drove to Zhuhai for the air show last week.— Is that ____ you had a few days off? (1999)A. whyB. whenC. whatD. because［例4］____ she couldn’t understand was ____ fewer and fewerstudents showed interest in her lessons. (2000上海)A. What; whyB. That; whatC. What; becauseD. Why; that［例5］____ made the school proud was ____ more than 90% of the students had been admitted to key universities. (2003上海春)A. What; becauseB. What; thatC. That; whatD. That; because表语从句练习题1. The question is ________ we will have our sports meet next week.A. thatB. ifC. whenD. whether2.The reason why he failed is ________he was too careless(carelessness ).A. becauseB. thatC. forD. because of3. Go and get your coat. It’ s ________you left it.It’s Zhejiang province.It’s Lun Xun was born.A. whereB. thereC. there whereD. where there 4．The problem is _________to take the place of Ted.A. who can we getB. what we can getC. who we can getD. that we can get5. What I want to know is ______ he likes the gift given by us.A. thatB. ifC. whetherD.不填6. The reason is_________I missed the bus.A. thatB. whenC. whyD. what7. That is __ ___ we were late last time.A. thatB. whenC. whyD. what8. She looked _________ she were ten years younger.A. thatB. likeC. asD. as though=as if似乎9.—I fell sick!--I think it is _______ you are doing too much.A. whyB. whenC. whatD. because10. The reason why he hasn’t come is ___________.A. because his mother is illB. because of his mother’s being illC. that his mother is illD. for his mother is ill11. —He was born here.-- That is _______ he likes the place so much.A. thatB. whatC. whyD. because12.That is ______ Lu Xun once lived.A. whatB. whereC. thatD. why 1．_______your father wants to know is________ getting on with your studies.A. What; how are youB. That；how you areC. How；that you areD. What；how you are2. The trouble is__________we are short of tools.A. whatB. thatC. howD. why that3. America was __________was first called “India” by Columbus.A. whatB. whereC. the placeD. there where4. China is becoming stronger and stronger. It is no longer_________ .A. what it used to beB. what it was used to beingC. what it used to beingD. what it was used to be5. ________he really means is ________he disagrees with us.A. What … thatB. That … whatC. What … whatD. That … which6. The energy is ________ makes the cells abl.A. thatB. whichC. whatD. suche to do their work1 .I had neither a raincoat nor an umbrella. ____I got wet through. （1998 上海）A. It’s the reasonB. That’s whyC. There’s whyD. That’s because2. See the flags on top of the building? That was ______ we did this morning.A. whenB. whichC. whereD. what3. What surprised me was not what he said but _____ he said it.（04湖北）A. the wayB. in the way thatC. in the wayD. the way which同位语从句Lu xun, a famous writer, is known to all of us.一、同位语由一个句子充当,就叫同位语从句。
总结表语从句知识点
总结表语从句知识点一、表语从句的定义和特点表语从句是一个从句，它在句子中作表语，用来说明主语、宾语的性质、特征、身份、状态、观念和判断等。
表语从句不可以独立存在，它必须与主句连成一个完整的句子。
表语从句有以下几个特点：1. 它可以由连接代词或连接副词“that, whether, if, who, whom, which, whose, what, when, where, why, how, as, as if, as though, so that” 等引导；2. 当主句为一般过去时，表语从句中的谓语动词要用过去时态；3. 表语从句通常紧跟在连系动词后面；4. 表语从句中的谓语动词常常是系动词；5. 在口语中，表语从句中的连词that 可以省略，但在正式的书面语中一般不省略。
二、表语从句的引导词表语从句可以由连接代词或连接副词引导。
下面是各种连接代词和连接副词的用法和区别：1. 连接代词的用法1) that(1) 作宾语从句或表语从句的引导词，引导主语、宾语的宾语从句或表语从句。
(2) 只能引导宾语从句或表语从句，不能引导状语从句。
(3) 在口语中常被省略，但在有时候不得不用，以免误解。
2) who/whom/whose(1) who用来引导表示人的宾语从句或表语从句；(2) whom 作宾语从句的介词宾语或从句的补语，也可引导表语从句。
(3) whose 用来引导表语从句，表达“……的人”，做身份、地位等意义上的主语。
3) which(1) 引导非限制性定语从句和表语从句。
(2) 修饰事物。
4) what(1) 作宾语从句的引导词。
(2) 引导表语从句。
5) Whatever/whoever/whichever /whoever/whichever/whenever……这是关系代词+ever 的形式，既可引导名词性从句，也可引导表语从句，用来表示”不管什么“之意”.连接代词引导的表语从句在引导从句的时候又分为两类，即引导主语从句的连接代词和引导表语从句的连接代词。
表语从句——精选推荐
表语从句一、什么是表语从句？表语从句放在连系动词之后，充当复合句中的表语。
表语从句(Predicative Clause)就是指一个句子作为表语，说明主语是什么或者怎么样，由名词、形容词或相当于名词或形容词的词或短语充当，和连系动词一起构成谓语。
二、表语从句的构成：关联词+简单句三、引导表语从句关联词种类：1. 可接表语从句的连系动词有be，look，seem，sound，appear等。
例句：At that time，it seemed as if I couldn't think of the right word. 当时，我似乎怎么也想不出一个恰当的字眼来。
2. 从属连词whether，as，as if / though引导的表语从句。
例句：It sounds as if someone is knocking at the door.听起来好像有人在敲门。
3. because，why引导的表语从句。
例句：That's why he got angry with me.那正是他对我生气的原因。
(That's why…强调结果)注意：what引导的主语从句表示结果或名词reason作主语时，后面的表语从句表示原因时要用that引导，不宜用because。
4. 连接代词who，whom，whose，what，which，whoever，whatever，whichever连接副词where，when，how，why例句：The problem is who we can get to replace her.问题是我们能找到谁去替换她呢。
5. 从属连词that例句：The trouble is that I have lost his address.麻烦是我把他的地址丢了。
6. 使用虚拟语气的表语从句在表示建议、劝告、命令含义的名词后的表语从句，谓语动词需用“should+动词原形” 表示，should可省略。
表语从句归纳总结
表语从句归纳总结在英语语法中，表语从句是一个非常重要的从句类型。
它用于表达主语或者宾语的特定状态、性质、或者判断。
本文将对表语从句的定义、结构、用法和常见的连接词进行归纳总结，帮助读者更好地理解和运用表语从句。
一、表语从句的定义表语从句是在句子中作表语的从句，用来描述主语或者宾语的特定状态、性质、或者判断。
它通常由连词“that”引导，也可以由一些其他引导词来引导，如“whether/if”等。
例如：1. She is a student.（她是个学生。
）→ She said that she is a student.（她说她是个学生。
）2. The important thing is to be confident.（重要的是要自信。
）→ He doesn't believe that it is important to be confident.（他不相信自信很重要。
）二、表语从句的结构表语从句的结构可以分为两种，一种是由连词“that”引导的，另一种是由是否疑问词引导的。
具体结构如下：1. 由连词“that”引导的表语从句主语（+be动词/系动词）+ that + 从句例如：1. The fact is that he is coming.（事实是他正在来。
）2. My opinion is that we should go.（我的观点是我们应该去。
）2. 由是否疑问词引导的表语从句主语（+be动词/系动词）+ 是否疑问词 + 从句例如：1. The question is whether he will attend the meeting.（问题是他是否会参加会议。
）2. Her concern is if she has enough time to finish the task.（她担心的是她是否有足够的时间完成任务。
）三、表语从句的用法表语从句的用法主要包括以下几种：1. 表达判断、观点、信念等例如：I think that she is a good friend.（我认为她是一个好朋友。
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（1表语从句）1．定义：用作表语的从句叫做表语从句。
2．构成：关联词+简单句3．引导表语从句的关联词的种类：(1) 从属连词that。
如：The trouble is that I have lost his address. 麻烦是我把他的地址丢了。
(2) 从属连词whether, as, as if。
如：He looked just as he had looked ten years before. 他看起来还与十年前一样。
The question is whether they will be able to help us. 问题是他们是否能帮我们。
注：从属连词if一般不用来引导表语从句，但as if却可引导表语从句，如：All this was over twenty years ago, but it's as if it was only yesterday.这都是20多年前的事了，但宛如昨天一样。
能跟表语从句的谓语动词一般为系动词be, seem, look等。
如：It looked as if it was going to rain. 看起来天要下雨了。
(3)连接代词who, whom, whose, what, which, whoever, whatever, whichever连接副词where, when, how, why。
如：The problem is who we can get to replace her. 问题是我们能找到谁去替换她呢。
The question is how he did it. 问题是他是如何做此事的。
That was what she did this morning on reaching the attic. 那就是她今晨上了阁楼干的。
解释：1．连词because可引导表语从句。
如：I think it is because you are doing too much. 我想这是因为你做得太多。
2．在一些表示“建议、劝说、命令”的名词后面的表语从句中，谓语动词用虚拟语气。
should+动词原形表示，should可省略。
如：My suggestion is that we (should) start early tomorrow. 我的建议是我们明天一早就出发。
（2）主语从句1．定义：用作主语的从句叫做主语从句。
2．构成：关联词+简单句3．引导主语从句的关联词有三类：(1) 从属连词that。
如：That they were in truth sisters was clear from the facial resemblance between them.很明显，她们确是亲姐妹，她们的脸型很相似。
(2) 从属连词whether。
如：Whether he’ll come here isn’t clear. 他是否会来这里还不清楚。
(3) 连接代词who, whom, whose, what, which, whoever, whatever, whichever连接副词where, when, how, why。
如：What she did is not yet known. 她干了什么尚不清楚。
How this happened is not clear to anyone. 这事怎样发生的，谁也不清楚。
Whoever comes is welcome. 不论谁来都欢迎。
Wherever you are is my home ---- my only home. 你所在的任何地方就是我的家----我唯一的家。
解释：1．主语从句能用it作形式上的主语。
常以it作形式主语的句型有：A. It+be+形容词(obvious, true, natural, surprising, good, wonderful, funny, possible, likely, certain, probable, etc.)+that从句。
如：It is certain that she will do well in her exam. 毫无疑问她考试成绩会很好。
It is probable that he told her everything. 很可能他把一切都告诉她了。
B. It+be+名词词组(no wonder, an honour, a good thing, a pity, no surprise, etc.)+that从句。
如：It’s a pity that we can’t go. 很遗憾我们不能去。
It’s no surprise that our team should have won the game. 我们没赢这场比赛真意外。
C. It+be+过去分词(said, reported, thought, expected, decided, announced, arranged, etc.)+that从句。
如：It is said that Mr. Green has arrived in Beijing. 据说格林先生已经到了北京。
It is reported that China has sent another man-made earth satellite into orbit.据报道中国又成功地发射了一颗人造地球卫星。
D. It+seem, happen等不及物动词及短语+that从句。
如：It seems that Alice is not coming to the party at all. Alice似乎不来参加晚会。
It happened that I was out that day. 碰巧我那天外出了。
E. It+doesn’t matter (makes no difference, etc.)+连接代词或连接副词引起的主语从句。
如：It doesn’t matter whether she will come or not. 她是否来这无关紧要。
It makes no difference where we shall have the meeting. 我们在哪里开会毫无区别。
F. 当that引导的主语从句出现在疑问句中时，要以it作形式主语，而把主语从句后置。
如：Is it true that the scientist will give us a lecture next week? 下周那位科学家将给我们作报告是真的吗？Does it matter much that they will not come tomorrow? 他们明天不来很要紧吗？G. 当主语从句出现在感叹句中时，要以it作形式主语，而把主语从句后置。
如：How strange it is that the children are so quiet! 孩子们这么安静真奇怪！2．注意连接代词whoever, whatever, whichever等引导主语从句的含义Whoever comes will be welcome. (whoever=the person who) 来的人将受到欢迎。
Whatever he did was right. (whatever=the thing that) 他所做的事情是正确的。
Whichever of you comes in will receive a prize. (whichever=anyone of you who) 你们当中不论哪个进来将会得到奖（3）宾语从句1．定义：用作宾语的从句叫宾语从句。
2．构成：关联词+简单句3．引导宾语从句的关联词有三类：(1) 从属连词that。
如：He told us that he felt ill. 他对我们说他感到不舒服。
I know he has returned. 我知道他已经回来了。
注：that在引导宾语从句时也并不是任何情况下都可以省略。
在以下情况下，that 不能省略。
1．Everybody could see what happened and that Tom was frightened.(and连接两个宾语从句，that宾语从句放在and的后面时，that不能省略。
)大家都会看出所发生的事情并知道Tom非常害怕。
2．I know nothing about him except that he is from the south.(that引导的宾语从句作介词宾语时，that不能省略。
)对他我一无所知，只知道他是南方人。
3．That he ever said such a thing I simply don’t believe. (that从句位于句首时，that 不可省略。
)我简直不相信他曾说过这样的话。
4．We decided, in view of his special circumstances, that we would admit him for a probationary period. (主句谓语动词与that从句之间有插入语，that不可省略。
) 鉴于他的特殊情况，我们决定应允他一段试用期。
(2)从属连词if/whether。
如：I doubt whether he will succeed. 我怀疑他是否会成功。
I don’t know if you can help me. 我不知道你能否帮助我。
(3)连接代词who, whom, whose, what, which, whoever, whatever, whichever连接副词where, when, how, why。
如：Who or what he was, Martin never learned.他是什么人？他是干什么的？马丁根本不知道。
I wonder what he’s writing to me about. 我不知道他要给我写信说什么事。
I’ll tell you why I asked you to come. 我会告诉你我为什么要你来。
You may do what you will. 你可做任何你想做的事。
(1) 介词宾语从句宾语从句也可用作介词的宾语。
如：He was deeply displeased by what had occurred that day.他对那天发生的事感到很不快。
I walked over to where she sat. 我走向她坐的地方。
I am curious as to what he will say. 我很想知道他要说什么。