英语语法:名词性从句—主语从句
主语从句讲解及习题

名词性从句之主语从句一、名词性从句概述:在句子中起名词作用的各种从句统称为名词性从句。
根据它们在句中的语法作用,这类从句又可分为主语从句、同位语从句、表语从句和宾语从句。
二、主语从句定义:在句中起主语作用的从句称为主语从句。
引导主语从句的连接词主要有:单纯连词(that, whether/ if)、连接代词(what, whatever, who, whoever, whom, whose, which, whichever 等)和连接副词(when, where, why, how, whenever, wherever, however 等)。
1)that引导的主语从句(1)由连词that引导的主语从句:引导词that无含义/在句中不做成分/不可以省。
例如:That you will win the medal seems unlikely.你能得奖看起来不大可能。
That light travels in straight lines is known to all.众所周知,光沿直线传播。
That you don’t like him is none of my business.你不喜欢他不管我的事。
(2)形式主语it替代主语从句位于句首,that引导真正的主语从句会放到句子的后面。
常用的句式主要有如下几种:1.It+系动词+形容词+that从句。
如:It is necessary that … 有必要 .....It is clear that … 很清楚.....It is likely that … 很可能.....It is important that … 重要的是.....类似的形容词还有:strange; natural; obvious; true; good; wonderful; possible; unlikely; quite; unusual; certain; evident; worth-while; surprising; interesting; astonishing, etc.例如:It was really astonishing that he refused to talk to you.It is essential that he should be here by the weekend.It seems obvious that we can not go on like this.It is necessary that you (should)master the computer.It is important that a student learn English well.It' s clear that they badly need help.It is likely that a hurricane will arrive soon.知识拓展:在“It is necessary / important/surprising/strange/unthinkable/unbelievable/incredible+that 从句”这类主语从句结构中,从句中谓语动词常用(should) +动词原形”,形式,即要用虚拟语气should 可省略。
名词性从句—— 主语从句、宾语从句、表语从句、同位语从句档

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.
英语语法——名词性从句

名词性从句名词性从句:主语从句;表语从句;同位语从句;宾语从句。
关联词:连接词:that whether if连接代词:who whom whose what which whoever whatever whomever 连接副词:when where how why1.主语从句例:What they said upset the old man. Who left the money puzzled the student.That the government will try their best to improve our life is ture.✧主语从句的注意事项:1) that 与 what 的区别•that作引导词时只起连接作用, 本身无意义, 也不充当句子成分, 但是不能省略。
That he is still alive is unbelievable. That we shall be late is certain.•what 既起连接作用,又充当从句中的句子成分,相当于n.What he said is true. What is needed is money.2) 用it 作形式主语时, 主语从句作真实的主语。
--- It is known that the compass was invented by the Chinese.--- It is said that he has got married.3) 主语从句不使用 if 来引导whether it is true remains a question2.宾语从句例:I doubt whether he will succeed.You may take what you want. He told us that he was ill.✧宾语从句的注意事项:1) 关于that的省略:that 作引导词时只起连接作用, 本身无意义, 也不充当句子成分, 在口语或非正式文件中可以省略。
名词性从句专项---主语从句,宾语从句,表语从句,同位语从句

名词性从句专项一、知识梳理/提炼要点一:句子的分类根据句子的结构可分为:①简单句——一主一谓。
②并列句——由等立连词and, but, so, for把两个(以上)的简单句连在一起构成。
③复合句——一个主句+从句(一个或以上)构成。
根据从句在复合句中的作用,分为名词性从句、定语从句和状语从句。
名词性从句包括主语从句、表语从句、宾语从句、同位语从句。
要点二:名词性从句总述1. 主语从句——在句中作主语,可用it作形式主语,把真正的从句放在句尾。
如:It is still a mystery how the prisoner escaped.犯人是如何逃跑的是个谜。
主语从句中,谓语动词一般用单数。
What引导的主语从句,可根据表语决定。
如:What he needs is that book?What he needs are some book?主语从句常用的结构有:It is well known/reported/thought/said/… that…It is natural/surprising/necessary/certain/true/clear… that…It is a pity/a shame/an honor/no surprise/no wonder… that…It doesn’t’t matter whether…It seems\appears that…It happens that…2. 表语从句——位于系动词之后充当复合句的表语,引导词that 一般可以省略,还可用as if/as though/because/why引导。
如:The question is who can complete the difficult task.问题是是能完成这项艰巨的任务。
3.同位语从句——跟在名词后面,进一步说明该名词的具体内容。
名词主要有:fact, news (word), promise, idea, truth, thought, suggestion, hope, proposal, doubt等。
名词性从句的种类与用法

名词性从句的种类与用法名词性从句是一个在句子中作为名词使用的从句。
它可以充当主语、宾语、表语和同位语等多种语法成分。
名词性从句在英语语法中占据重要地位,掌握不同种类和用法对于语言的正确运用至关重要。
本文将介绍名词性从句的种类以及用法。
1. 主语从句主语从句在句子中充当主语,它通常以以下引导词引导:that, whether, if和wh-词(如what, who, where等)。
例如:- That he is late again is no surprise to me.(that引导)- Whether he will come to the party is still uncertain.(whether引导)- If it rains, we will stay at home.(if引导)- What he said shocked everyone.(wh-词引导)主语从句通常用于句子的开头位置,对于解释原因、表述事实等起到重要作用。
2. 宾语从句宾语从句在句子中充当宾语,它通常以以下引导词引导:that, whether, if和wh-词。
宾语从句通常出现在及物动词、介词后面,或者某些动词后面,例如:ask, tell, wonder, doubt等。
例如:- He asked if I could help him with his homework.(if引导)- She wonders whether it will rain tomorrow.(whether引导)- They doubt that he will win the game.(that引导)宾语从句常用来回答或者询问一些事实、观点、问题等。
3. 表语从句表语从句在句子中充当表语,它通常用于系动词后面,对主语进行补充说明。
表语从句通常以以下引导词引导:that, whether, if和wh-词。
例如:- Her biggest dream is that she can travel around the world.(that引导)- The question is whether we should continue the project.(whether引导)- His worry is if he can pass the exam.(if引导)表语从句用于说明主语的特征、状况、情况等。
名词性从句和主语从句的区别

名词性从句和主语从句的区别名词性从句和主语从句是英语语法中两个重要的从句类型,它们在使用和功能上有着一些区别。
本文将对名词性从句和主语从句的区别进行详细介绍。
一、名词性从句的定义和功能名词性从句是在句子中充当名词的作用,可以作为主语、宾语、表语或同位语。
名词性从句通常由连接代词(如what, who, whom, which, whoever, whatever)或连接副词(如when, where, why, how)引导。
名词性从句在句子中的功能类似于名词,用于表达陈述、提问、建议、愿望、要求、目的、理由等。
二、主语从句的定义和功能主语从句作为句子的主语,从句中的谓语动词所表示的是主句中的主谓关系。
主语从句通常由连接代词(如what, who, whom, which, whoever, whatever)或连接副词(如when, where, why, how)引导。
主语从句在句子中的功能是充当整个句子的主语,用于表达主谓关系,而且不能省略。
三、名词性从句和主语从句的区别1.位置不同:- 名词性从句可以出现在句子的主语、宾语、表语和同位语等位置,位置较为灵活。
- 主语从句只能作为句子的主语出现,位置不可变。
2.引导词不同:- 名词性从句常由连接代词或连接副词引导。
- 主语从句也常由连接代词或连接副词引导,但通常只由连接代词引导。
3.结构不同:- 名词性从句在结构上是完整的句子,包含主语、谓语和其他成分。
- 主语从句在结构上只包含主语部分,谓语动词在主句中。
4.可替换性不同:- 名词性从句可以被代替为一个单词或一个词组。
- 主语从句在句子中起到主语的作用,不能被代替。
四、名词性从句和主语从句的例句说明1. 名词性从句的例句:- I don't know what he said.(主语从句作宾语)- Tell me where she lives.(主语从句作宾语)2. 主语从句的例句:- What he said is interesting.(名词性从句作主语)- Where she lives is a mystery.(名词性从句作主语)综上所述,名词性从句和主语从句在使用和功能上存在区别。
名词性从句详解及练习

各类从句详解英语从句可以分为名词性从句、定语从句和状语从句三大类:下面我们逐一进行说明:一、名词性从句(主语从句、表语从句、宾语从句、同位语从句)主语从句、表语从句、宾语从句和同位语从句在复合句中的充当的成分和其名称相同,分别作主句的主语、表语、宾语和同位语。
上述这四种从句均被称为名词性从句。
所有的名词性从句均不能用逗号分开,并且它们都用相同的关联词,关联词如下:①主从连词:that (无意义), whether (是否), if (是否)(在句子中不充当任何成分)②连接代词:who (谁), whom (谁), whose (谁的), what (什么), which (哪一个)③连接副词:when (什么时候), where (什么地方), how (怎样), why (为什么)主从连词只起连接作用,连接代词和连接副词除了起连接作用外,还充当从句某一个成分。
另外,可以用whatever, whichever, whoever, who(m)ever等连接代词引导名词性从句,来加强语气。
下面分别对各种名词性从句进行介绍(一)主语从句(subject clause)在主句中用作主语的主谓结构称之为主语从句。
例如:That he will come to the discussion is certain.他来参加讨论是确定的。
That the moon moves round the earth is well known to all of us.月球绕地球转动,这是我们大家都熟知的。
When the meeting is to be held has not yet been decide.会议什么时候召开还没有决定。
主语从句放在句首,句子常常显得比较笨重,因此通常可以把it放在句首,作形式主语,而将主语从句放在后面。
例如上面的句子可以分别改写为:It is certain that he will come to the discussion.It is well known to all of us that the moon moves round the earth.It has not yet been decide when the meeting is to be held.下面再举一些例句:What they are after is profit.他们追求的是利润。
名词性从句知识点总结

名词性从句知识点总结名词性从句是指在一个句子中扮演名词的角色,作为主语、宾语、表语等成分的从句。
在英语语法中,名词性从句是一个重要的语法结构,掌握好名词性从句的知识点对于提高英语语言水平和理解复杂句子非常有帮助。
本文将对名词性从句的几个主要知识点进行总结。
1. 定义和特点名词性从句是一种从句类型,它在句子中充当名词的角色,可以作为主语、宾语、表语等。
名词性从句通常由连接词引导,如that、whether、if、who、whom、whose、which等。
2. 主语从句主语从句在句子中作为主语,常用连接词that引导。
例如:That heis late is a common problem.(他迟到是个常见问题。
)3. 宾语从句宾语从句在句子中作为动词的宾语,通常由连接词that、whether、if引导。
例如:She asked me if I could help her.(她问我是否能帮她。
)4. 表语从句表语从句在句子中作为表语,常用连接词that引导。
例如:The important thing is that you are safe.(重要的是你安全。
)5. 同位语从句同位语从句在句子中作为对某个名词或代词的解释或说明,通常由连接词that引导。
例如:The fact that she passed the exam is a relief.(她通过考试的事实令人松了一口气。
)6. 后置定语从句后置定语从句在句子中作为对名词或代词的修饰,通常由关系代词引导。
例如:The book that she recommended is very interesting.(她推荐的那本书非常有趣。
)7. 时间状语从句时间状语从句在句子中作为一个时间状语来修饰动词,常用连接词when、while、as、before、after等引导。
例如:He arrived home before it got dark.(在天黑之前他回到了家。
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英语语法:名词性从句—主语从句
(1)名词性从句(归属于名词类):
主语从句
表语从句
宾语从句
同位语从句
(2)形容词性从句(起描绘名词的修饰作用,归属于形容词类):定语从句
(3)副词性从句(起描绘谓语动词的修饰作用,归属于副词类):状语从句
1.名词性从句
1.1主语从句——一般们于句子的开头,以从属连词引导。
连接主语从句的连词
纯连词:that(不有词义,只起连接作用,在从句中不充当成分)
whether
连接副词:when, where, how, why
连接代词:what, whatever, who, whoever, which
That Jack got an A for his physics is a surprise.
杰克的物理得了优秀真是令人惊喜的。
That July went to New York is no news now.
朱莉去纽约一事可不是什么新闻了。
注意,此类主语从句通常必成以下形式,显得更平衡自然一些:
It is surprise that Jack got an A for hisphysics.
It is no news now that July went to NewYork.
此类从句中的that是不能省略的,因为省去that后就不看出是从句了。
Whether she agrees or not is nothing to me.
她是否同意对我毫无影响。
Whether we come or not depends on the weather.
我们是否来取决于天气。
此类主语从句中的whether既起连接作用,又有意思,不能省略。
特别需要注意的是:
用whether引导的主语从句,不能使用if代替:
×If she agrees or no is nothing to me.
×If we come or not depends on the wether.
When we set out is not decided yet.
我们何时出发还没定下来呢。
How she succeeded remains a secret.
他怎么成功的仍然是一个秘密。
Where Bob chooses to stay is up to him.
鲍勃选择在哪里居住由他自己决定。
What the teacher stressed will be in the exam paper.
老师强调的内容会出现在考卷中。
Who is the new teacher matters a lot.
谁当新教师关系可大了。
英语单词填空:
1.___ he is right or not doesn’t matter to me.
A.Which
B.What
C.Whether
D.If
2.___ they did is their own business.
A.What
B.Which
C.Whether
D.That
3.___ Jane wants to go does not upset us.
A.Which
B.Wherever
C.What
D.For what
4.___ they were late was not known to some people.
A.The fact
B.When
C.Why
D.That
5.___ is said ___all the students got up very early.
A.It …the fact
B.It…the fact that
C.It…which
D.It…that
分析句子的英语语法结构,并翻译成中文:
More than 140 people are feared to have been buried by a landslide in south-west China. The landslide from a nearby mountain engulfed more than 40 homes and a hotel in Xinmo, a village in Sichuan province, atabout 6 am local time (2300 BST), the Mao county government said.。