主语从句讲解及练习

主语从句1．定义：用作主语的从句叫做主语从句。

2．引导主语从句的关联词有三类：(1)从属连词that、whether。

如：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。

Whether he’ll come here isn’t clear. 他是否会来这里还不清楚。

从属连词：that，whether等.that 引导主语从句只起引导作用，本身无实际意义，在主语从句中不充当任何成分，但不能省略。

由whether及其他连词引导的主语从句放在句首，句后都可。

If只能放在句中。

(2) （特殊疑问词）连接代词who, whom, whose, what, which, whoever, whatever, whichever如：___which_______watch was lost is unknown._____what_____she did is not yet known. 她干了什么尚不清楚。

__which________side will win is not clear.Whoever comes is welcome. 不论谁来都欢迎。

(3) （特殊疑问词）连接副词where, when, how, why，wherever，whenever，however。

___________ he did it remains a mystery.When they will start is not known yet.How this happened is not clear to anyone. 这事怎样发生的，谁也不清楚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。

初中英语主语从句主语从句是英语语法中的一个重要概念，在句子中起到主语的作用。

掌握主语从句的用法对于提高英语的句子结构和语法的准确性至关重要。

本文将详细介绍初中英语主语从句的定义、用法、结构以及常见的引导词。

同时，提供一些例句和练习，帮助读者更好地理解和应用主语从句。

一、定义主语从句，顾名思义，即可在句子中作主语的从句。

它通常由连词引导，放在句首，并且在句子中起到主语的作用。

主语从句可以是一个完整的句子，也可以是一个简单的短语。

二、用法1. 主语从句可以替代一个复杂的名词短语作为句子的主语，使句子更加简洁明了。

例如：- Whether she will come to the party is still unknown.（她是否会来参加聚会还不确定。

）- What you said is very important.（你说的话非常重要。

）2. 主语从句常出现在以"It is"开头的句子中，这种句子结构被称为"It is"句型。

主语从句位于"It is"之后，形成强调句型。

例如： - It is important to learn a foreign language.（学习一门外语很重要。

）- It is necessary that we should protect the environment.（我们有必要保护环境。

）3. 主语从句可以通过引导词来引导，根据不同的情况选择合适的引导词。

下面是一些常见的引导词及其用法：- Whether（是否）：用于对一个选择或问题进行提问。

例如：I don't know whether he will come or not.（我不知道他会不会来。

） - That（是否）：用于对一个陈述性语句提问。

例如：That he is a doctor is well-known.（他是医生是众所周知的。

主语从句一、主语从句的连词分三类(1 )从属连词引导的主语从句(that whether if)that引导的主语从句：引导词that无含艾/在句中不做成分/不可以省。

That引导主语从句通常用it作形式主语。

例如：Tha t you wi I I win the meda I seems uni ike I y.That she survived the accident is a mi racle・whether引导的主语从句：whether有含狡(是否)/在句中不做成分/不可以省。

注意：引导主语从句，不能用if不能在开头.只能用whetheroWhether we will hold a party in the open a i r tomorrow depends on the v/eather・Whether she i s coming or not doesn' t matter too much・(2)用连接代词引导的主语从句在由连接代词who, whose, whom, which, what, whoever, whomever, whichever, whatever 引导的名词性从句中，其连接代词在句中超名词性作用，担当一定成分.例如：V/hat you need i s more practice.V/hatever we do is to serve the people・注：whatever / whoever 的功用whatever, whoever在主语从句中不含疑问意狡。

它引导主语从句，并在从句中作主语、宾语、表语等。

wha tever = any thing t hat; whoever = any one who。

要注意和whatever, whoever 引导的让步状语从句的区别。

如：Whoever breaks the law shouId be punished・(主语从句)( =Anyone who breaks the law shouId be punished・)Whoever breaks the law, he should be punished.(让步状语从句)( =No matter who breaks the law, he shouId be punished・)(3)用连接副词when, where, why, hov/引导的名词性从句(其连接副词有含狡，在句中作状语。

高考英语主语从句翻译练习班级_考号姓名总分1.据估计，上海每年春节要接待几百万游客。

(It)2.还不知道是什么原因造成这次森林火灾。

(cause)3.你要一个人完成那项任务似乎很困难。

(seem)4.无论他为他的父母做什么，都会让他们很开心。

(top)5.据报道，很多大学生想毕业后自己创业。

(report)6.我突然想到我忘记通知他们考试的时间了。

(occur》7.这个课程的创新之处在于它很大程度上尊重了小学生的学习(What)8.据说每天喝适量的葡萄酒可以使人保持年轻。

(stay)9.他从没想到两家公司都会给他工作机会，但是他不知道该如何选择，因为它们都是行业内的翘楚。

(occur)10.随着社会竞争日益加剧,青年人掌握至少两门语言是十分必要的。

(It)11.将来过怎样的生活取决于你自己。

(be up to)12.这个游戏的独特之处在于它让孩子学会如何应对现实生活中的问题。

(What)13.建议该实验在低温下操作。

(suggest)14.任何能够采用新方法解决这道技术难题的人,都将受到奖赏。

(Whoever)15.让这所学校自豪的是超过90%的学生都被重点大学录取。

(What)16.人们普遍认为在公共场合大声说话是不文明行为,应该避免。

(It)17.我从未想到那些偏远山区的孩子们生活条件如此艰苦。

(occur)18.随着科技的发展，电脑是否会取代传统的教学方式成为了当下最热的话题之一。

(substitute)19.因为蓝色是天空和海洋的颜色,所以蓝色自然常和冷静,可靠和喜爱平静生活联系在一起。

(natural)20.但凡家境殷实的单身汉，必然想娶妻成家，这是举世公认的道理。

(It)附：参考答案1.It is estimated that Shanghai receives millions of visitors every Spring Festival.2.What caused the forest fire is still unknown.3.It seems very difficult that you are to complete the task alone.4.Whatever he does for his parents makes them feel on top of the world.5.It is reported that many college students want to start their own business after graduation.6.It suddenly occurred to me that I had forgotten to inform them of the time for the exam.7.What is original in this course is that it respects pupils， study habits to a great extent.8.It is said that drinking a proper amount of wine every day can help one to stay young.9.It never occurred to him that the two companies would both give him a job offer, but he didn，t know which to choose, because both of them belong to the top of the industry.10.It is necessary for the young to master at least two languages with the social competition getting increasingly fiercer11.It's up to you what kind of life you will lead in the future12.What makes this game peculiar lies in that it teaches kids how to handle the problems in real life.13.It is suggested that the experiment should be made under a low temperature.14.Whoever can adopt a new approach to solving the technical problem will/shall be awarded.15.What made the school proud was more than 90% of the students had been admitted to key universities.16.It is generally believed/ considered/ thought that talking loudly in public is uncivilized and should be avoided17.It never occurred to me that the living conditions of the children should be so hard in the remote mountainous areas18.With the advancement of technology, whether computers will substitute for traditional teaching means has become one of the hottest topics nowadays.19.Since blue is the colour of the sky and the sea, it is only natural that it should often be associated with calmness, reliability and preference for a peaceful life.20.It is a truth universally acknowledged that a single man in possession of a good fortune must be in want of a wife.附：知识讲解主语从句就是从句作句子主语,一般放在句首，即主句谓语动词之前。

名词性从句名词性从句〔主语、表语、宾语、同位语从句〕（一）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) 附属连词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) 附属连词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。

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。

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。

C.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。

Subject Clause and Predicative ClauseⅠ. 主语从句(Subject Clause)一定义：__________________________________________________.1. He is right .2. What he said is right .二.主语从句引导词1.主语从句的引导词与宾语从句一样。

〔但不用if 〔是否〕，只能用whether(是否)〕1) that 2) whether3) what , which ,who, whom, whose, whatever , whichever.....4) where , when , why, how, wherever, whenever .....5) how many , what color, how far等。

2. 引导主语从句的关联词除起连接句子的作用，绝大多数关联词在主从中要充当一定的句子成分。

3. 主语从句的语序是：关联词+S+V三. 主语从句引导词的用法:1. that 的用法：that 引导句意完整, 意义明确不缺成分的述句；无词义，在主从中不充当句子成分，不能省略。

仿照例子改写句子改成相应的主语从句Model: There is life on another planet (在另外的星球上)〔that 引导的主从〕 It is almost impossible.→That there is life on another planetis almost impossible(主从) s v.1). The scientist will give us a lecture ne*t week. It is true. →2). You don’t like him. It is none of my business.(不关我的事) →3).Her hair was turning gray(灰色). It worried her bit.→4). He told her everything. It is probable.→5). He sings so well. It is no surprise.→2. whether 的用法: whether引导的主从不缺句子成分，句意不完整，表达一种不确定，不明确的概念；whether当"是否"讲，在主从中不充当句子成分。

主语从句一、概念：在复合句中起主语作用的从句叫主语从句。

（一）连接词从属连词：that、whether；关系代词：who, what, which , whom, whose, whatever, whoever, whomever, whichever；关系副词：when, where, how, why, however, whenever, wherever等；例：What he said is true.That you don’t like him is none of my business.Whether the football game will be played depends on the weather.主语从句的时态：不受主句的时态影响和限制。

（1）______ he finished writing the composition in such a short time ______(惊讶) us all.（2）______we will go for an outing tomorrow ______（remains，remained）unknown.（3）______ will be our monitor ______(be) decided yet.（4）______we must study for ______ (be) a question of great importance.（5）______ caused the accident ______（remains，remained）unknown.（6）______ you did ______ (be)right.（7）______ watch ______(be) lost is unknown.（8）______we need ______(be) time.（9）______ we need ______(be) good doctors.小结:（1)主语从句的时态：不受主句的时态影响和限制。

英语语法主语从句教案【教学目标】1. 理解主语从句的定义和用法。

2. 学习主语从句的基本句型结构。

3. 掌握判断和转换句子中是否可以使用主语从句的方法。

4. 能够正确运用主语从句进行英语句子的写作。

【教学内容】1. 主语从句的定义和用法。

2. 主语从句的基本句型结构。

3. 判断和转换句子中是否可以使用主语从句的方法。

4. 主语从句在句子中的应用。

5. 主语从句的练习和应用。

【教学准备】1. 教师准备相关教学资料和案例。

2. 学生准备笔记。

【教学过程】一、导入 (Introduction) (200字左右)引入主题，简单介绍主语从句的概念和作用。

可以引用一些例子，让学生对主语从句有初步的了解。

二、讲解 (Explanation) (500字左右)1. 主语从句的定义和用法 (150字左右)- 主语从句是一个句子，用来作为句子的主语。

- 主语从句通常由连词引导，如that, whether, who, what, which等。

2. 主语从句的基本句型结构 (150字左右)- 主语从句可以替代一个名词短语或代词作为句子的主语。

- 句型结构：主语从句 + 谓语 + 其他。

3. 判断和转换句子中是否可以使用主语从句的方法 (200字左右)- 判断是否可以使用主语从句，可以使用换位法，将宾语移到句首，观察句子是否通顺。

- 转换成主语从句时，需要注意句子时态、语态和人称的变化。

三、应用 (Application) (1000字左右)1. 主语从句在句子中的应用 (400字左右)- 解释主语从句在不同句子类型中的应用，如陈述句、疑问句、祈使句等。

- 举例说明不同类型句子中使用主语从句的变化。

2. 主语从句的练习和应用 (600字左右)- 准备一些练习题，让学生根据要求完成句子中的主语从句。

- 通过练习巩固学生对主语从句的理解和运用能力。

四、总结与拓展 (Summary and Extension) (300字左右)1. 总结主语从句的特点和应用 (150字左右)- 对主语从句的定义、用法、句型结构和应用进行总结回顾。