各类从句讲解与例句

2024-05-17

各类从句讲解与例句（精选7篇）

各类从句讲解与例句篇1

定语从句练习

定语从句练习测试题

1.I know the boy.The boy can speak English well.I know the boy _____ can speak English well.2.I have a friend.His father is a teacher.I have a friend _______ father is a teacher.3.I can’t find the house.My friend lives in it.I can’t find the house _______my friend lives in.OR: I can’t find the house _________________ my friend lives.I.定语从句的分类：

1.In their class there are fifteen students who can speak English well.2.In their class there are fifteen students, who can speak English well.3.She has two sons who are P.L.A.men.4.She has two sons, who are P.L.A.men.II.限定性定语从句和非限定性定语从句的区别：

1、限定性定语从句必须和主句紧紧连在一起，不可分开；非限定性定语从句一般用逗号与主句隔开。

2、限定性定语从句的关系代词做宾语时，有时可以省略，而非限定性定语从句的关系代词不可以省略。eg: This is the girl(whom)I met yesterday.She sang a song, which we liked very much.3、非限定性定语从句中的关系代词可以代表一个单词、词组或整个句子。My brother lives in Zhongshan, which is only two hours’ drive from here.The English party , which was held in our school, was good.He lost his bike, which made him unhappy.III.定语从句的基本结构：先行词+ 关系词 + 从句

关系代词有：who whom that whose which 关系副词有： when where why IV.修饰物体时关系代词that和 which的区分只使用that的情况：

1、当先行词是nothing, something, anything, all, each, everything ,much, little, few, none,(the)one等不定代词时。

eg.Do you have anything that is important to tell me?

2、当先行词被all, any, some, no, not, every, each, much, little, few等修饰时。eg.I have some books that are very good.3、当先行词被形容词最高级、序数词所修饰时。

eg.This is the first book that I bought myself.The biggest bird that I caught is this bird.4、当先行词被the very, the last, the next, the only 等词修饰时。

eg.This is the very book that I lost yesterday.5、当先行词又有人又有物时。

eg.I won’t forget the things and the persons that I saw.6、先行词在从句中作表语时。Eg)Our school is not the one that it used to be.只能使用which的情况。

1、非限制性定语从句中。eg.Mary has a book, which is very precious.2、在介词之后。eg.This is a house in which lives an old man.3、当主句中的主语被that修饰时。eg.That dog which I found in the street belongs to Mary.Fill in the blanks with suitable relative pronouns(which / that).1.This is the only book ____ I got last year.2.Is this the book in ____ you are interested?

4.Rose still remembers the trees and teachers____ exist(存在)in the mother school.5.All the desks ____ are bought look really wonderful.6.Do you have any money ____is used to build the factory? 7.Tom has a toy, ____ was given by his father.8.This is the second watch ____ my father bought for me.V.修饰人时关系代词that 和who, whom的区分。

先行词是one, ones, anyone, those，people时，宜用who;? 在There be开头的句字中，宜用 who；

先行词指人，且关系代词前有介词时，只用whom;（She is the girl with whom I went there.）whose是代词的所有格，可指人也可指物。

I saw a woman whose hag was stolen.Please show me the book whose cover is red.Fill in the blanks with suitable relative pronouns(who / that).1.Look at that lady ______ name is Polly.A.who B.whose C.that 2.The girl ______ could sing well went to Europe.A.who B.whose C.whom 3.Tom is the first boy _____ left the room.A.who B.that C.which 4.Those ______ want to go to the Great Wall sign your name here.A.that B.whose C.who 5.There is an old man ______ wants to see you.A.who B.that C.whom VI.关系副词when, where, why 和介词+which之间的关系。关系副词when, where, why可以用适当的介词+which来替代。如：when=in/on/at…+which, where=in/on/at…+which, why=for +which介词的位置非常灵活，有时放在关系代词之前，有时放在动词之后。eg.1.I won’t forget the date when(on which)I was born.2.This is the room where(in which)I lived.= This is the room which I lived in.3.I don’t know the reason why(for which)he haven’t come today.4.Tom still remembers the days when(in which)they lived in Tianjin.Fill in blanks with why, where ,when.1.The reason ______ I’m calling you is to invite you to a party.2.This is the house _____ I worked two years ago.3.I’ll never forget the day _____ I joined the army.4.That was the year _______ I went to America.5.This is the reason ________ I come here.定语从句讲解 2 Fill in blanks: 1.He is the famous scientist ________ will give us a lecture next week.2.A good teacher is one _______ students not only respect but also love.3.Have you found the little boy _________ you have been looking for these days? 4.On my way home I met the girl about ________ you told me yesterday.5.At last the policeman found the man ________ wallet was stolen on the bus.6.The papers ______ they are searching for have been discovered here.7.New York is the first city to _______ she has ever been in her life.8.The house is not the one _________ it was when we lived in it.9.They finally arrived at an island ______ name was very strange to them.10.Is there anything interesting in this book _______ is worth reading? 11.The first runner ______ reached the finishing line was my classmate.12.The only thing ________ we can do for the man was to give him some money.14.Do you know the years _______ the great scientists was born and died? 15.I have never been to the village ________ my mother worked as a teacher.16.Can you take us to the square ________ the important meeting was being held? 17.I know the reason ________ the factory didn’t carry out the production plan.18.In the park she met an old friend, _______ invited her to his house for a visit.19.Our teacher, ______ wife fell ill yesterday, cannot come to work today.20.His medicine, _______ was kept in a broken bottle, was all spoiled(坏了).21.He died of hunger during the war, ______ we all suffered for lack of food.22.The new car, for______ I have paid several thousand pounds, isn’t run well.23.Last Monday I went to Beijing, _____ I attend an important meeting.24.My dog, _____ temper is very bad, often barks at my family.25.Jack drove too fast and, what’s more, very carelessly, ______ worried her very much.Exercise: 1.TOEFL is a test for students _____ native language is not English.A.whose B.that C.of whom D.for who 2.Much ____ I have read has been of little help to the problem.A.what B.that C.which D.as 3.I still remember the garden _____ my son could not tear himself away.(勉强使自己离开)A.which B.where C.to which D.from which 4.In the dark street, there wasn’t a single person ____she could turn for help.（turn to sb.for help）A.to whom B.who C.from whom D.that

5.She heard a terrible notice, _____ brought her heart into his mouth.A.it B.which C.this D.that 6.I shall never forget those years _____ I lived in the country with the farmers, _____ has a great effect on my life.A.that;which B.when;which C.which;that D.when;who 7.Alice received an invitation from his boss, ____ came as a surprise.A.It B.that C.which D.he 8.Next week he will visit the airbase ____ he worked 25 years ago.A.when B.as C.where D.which 9.Mr.White took us to a small town, ____ he set up his first factory.A.where B.here C.which D.that 10.August 15,1999 is one of the greatest days in his life _____ he was accepted by a university.A.while B.that C.which D.when 11.I wonder if you know anybody ____ parents work at the airport.A.whose B.their C.his D.her 12.It was a cold winter night , and there wasn’t anyone ____ the boy could turn to for help.A.that B.which C.whom D.what 13.This is the only English-Chinese dictionary ____ could be found in the teacher’s reading-room.A.what B.it C.which D.that

14.She keeps her keys and money in the handbag ____she takes with her everywhere.A.which B.so C.therefore D.when 15.Our concert turned out to be a great success, ____ they had never expected.A.what B.that C.when D.which 16.The Yangtze is the longest river in China, ____ which several bridges have been built recently.A.onto B.through C.above D.over 17.I’d like to join the tennis club _____ which my friend belongs.A.to B.for C.with D.in 18.He arrived late, _______ was annoying.A.what B.that C.which D.who 19.The weather turned out to be very good, _____ was more than we could expect.A.what B.which C.that D.it

20.I have to book ahead(事先预定)for the concerts _______ are usually held in London.A.where B.what C.which D.they

定语从句答案

---1who/that 2whose 3that/which;where/in which---1that 2which 3that 4that 5that 6that 7which 8(that)---1B 2A 3A/B 4C 5A---1why 2where 3when 4when 5why Fill in blanks 1who/that;2whom;3whom/that;4whom;5whose;6which/that;7which;

8that;

9whose;

10that;11who/that;12that;

13when;14when;15where;16where;17why;

18who;19whose

;20which;21when;

22which

23where;24whose;25which Exercise: 1ABBAB 6BCCAD

11ACDAD

16DACBC

定语从句讲解的步骤与方法篇2

关键词：高中英语定语从句步骤方法

【分类号】G633.41

我们对任何一个语法知识点的掌握，首先应该理解该语法点的基本概念。定语从句，顾名思义，就是充当定语的一个从句。由此而衍生了其他的基本知识点——既然是充当定语，说明它的位置通常是放在名词后；既然是从句，那么必须隶属于一个主句，并且符合句子的基本构成以及从句的基本要素。

定语从句分为限制性和非限制性两种，引导词主要分为关系代词（that， which， who， whom， whose， as）和关系副词（why， when， where）。

Which只能指物，在从句中既可做主语，宾语，也可以做表语。既可引导限制性定语从句，也可以引导非限制性定语从句，可以直接将可拆分介词放在which前。That既可指人也可指物，既可做主语，宾语，也可以做表语，不能引导非限制性定语从句，不能直接将介词放在that前。限制性定语从句中，有些特殊情况，必须用that：1、先行词为不定代词时，其后的定语从句关系代词只能用that，指人时也可用who/whom。2、先行词为两者或两者以上，兼指人和物时，其后的定语从句关系代词只能用that，指人时也可用who/whom。3、先行词被定冠词+序数词/形容词的最高级所修饰时，其后的定语从句关系代词只能用that，指人时也可用who/whom。4、先行词被the+very/sole/unique/right所修饰时，其后的定语从句关系代词只能用that，指人时也可用who/whom。5、多个定语从句修饰同一个名词时，第二个及以上的定语从句关系代词只能用that。6、在疑问代词引导的特殊疑问句中所包含的定语从句关系代词只能用that。7、先行词为way，其后的定语从句关系代词通常用that.。

方法点拨：非限制性定语从句中绝不可用that来引导，而在限制性定语从句中，不管先行词是人还是物，只要不是直接放在介词后，那么用that基本不会出错。

Who只能指人，在从句中通常充当主语、表语，有时也可充当宾语，不可直接放在介词后。Whom只能指人，在从句中通常充当宾语，可以直接放在介词后。Whose不可單独使用，其后必须还有一个名词，共同在从句中起一个名词的功能。Whose+ n. 相当于the+ n.+ of+ which/whom。As引导限制性定语从句时，先行词通常被such/the same 所修饰。引导非限制性定语从句时，既可放在主句前，也可放在主句的中间或后面。

方法点拨：名词被such所修饰，如果其后的从句已完整，那么通常用that，如果不完整，通常用as.

which与as引导非限制性定语从句时，两者引导非限制性定语从句时，可指代主句中的部分或整个句子的内容，在从句中做主语，宾语或表语，位于主句之后有时可互换。

两者的不同点：

1. as可以放在主句前后，也可插入主句之中；而which引导的非限制性从句只能位于主句之后。2.在非限制性从句中，which后的be动词不可省；as而后的be动词可以省略。3. which在非限制性定语从句做主语时可用各类动词做谓语；而as做主语时，谓语常用系动词，如be， seem， become等，一般不用其他行为动词。4. as常用“正如”含义，常用的结构有as we know（众所周知）；as often happens（正如常发生的那样）；as is often the case（情况常常如此）； as we all can see（正如我们看到的）； be announced/ expected/ known/ imagined/ mentioned /said /shown /reported等。这些结构常放句首，偶尔也可以放句中或句末。5. 在非限制性定语从句中which指代主句中某一个单词时，as不可以。6. “介词+关系代词（介宾代物）”中关系代词只能用which。.7. 从句中的谓语动词是否定形式时，常用which。 8.在非限制性定语从句关系代词代表前面主句中的宾语从句时，常用which

关系副词在定语从句中通常充当状语。先行词为reason时，其后的定语从句关系副词通常用why/for which；先行词为表时间的名词时，其后的定语从句关系副词通常用when；先行词为表地点的名词时，其后的定语从句关系副词通常用where.

定语从句例句篇3

两者均可引导非限制性定语从句，有时能够互换，但下列情景多用as。

1. 关系代词引导的定语从句居句首时。 As we all know， the earth is round.

2. 当与such或the same连用时，一般用as。 Such books as you tell me are interesting. I have the same plan as you.

3. 当从句和主句语义一致时，用as，反之则用which。 She has married again， as was expected. She has married again， which was unexpected.

4. as在从句中作主语时，后面常接行为动词的被动语态，如be known，be said，be reported等，如从句中行为动词是主动语态，一般要用which作主语。

She has been late again， as was expected.

高中定语从句例句练习题篇4

请找出下列各句中的错误并加以改正。

1. This is the factory where we visited last week.

2. This is the watch for which Tom is looking.

3. The person to who you spoke is a student of Grade Two.

4. The house in that we live is very small.

5. The sun gives off light and warmth，that makes it possible for plants to grow.

6. I’ve read all the books which I borrowed from the library.

7. This is the best film which I have ever seen.

8. My father and Mr. Smith talked about things and persons who they remembered in the country.

9. Everything which we saw was of great interest.

10. His dog，that was now very old，became ill and died.

11. The reason which he didn’t go to school is that he was ill.

12. Those who wants to go with me put up your hands.

13. The boy，his mother died last year，studies very hard.

14. I have two sisters，both of them are doctors.

15. We’re going to visit the school where your brother works there.

16. He is the only one of the students who have been invited to the English Evening.

17. That is the way which they work.

18. Those have questions can ask the teachers for advice.

19. Who is the man who has white hairs？

定语从句讲解篇5

一个美丽的女孩

a beautiful girl（形容词作前置定语）一个穿白色衣服的女孩

a girl in white（介词短语作后置定语）一个正唱歌的女孩

a girl who is singing(定语从句，修饰或限定名词girl）

一、概念: 在复合句中修饰名词或代词的句子.Harry Porter is a smart boy.形容词作定语 Harry Porter is a boy who has magic power.句子作定语,修饰boy, 叫做定语从句先行词：被定语从句所修饰的名词或代词。关系词分为关系代词和关系副词。

关系代词：who whom whose which that as

关系代词：when where why 先行词和关系词的关系

1.A plane is a machine that can fly.the machine = that 2.The boy who broke the window is called Tom.the boy =who 3.The boy whose parents are dead was brought up by his grandfather.the boy’s =whose The school where I study is far from my home.in the school = where 关系代词实际上是先行词的复指

关系词whose实际上是先行词的所有格关系副词实际上是介词＋先行词关系代词的作用

1.代替先行词;

２.它还在定语从句中担任一定的成分;

3.同时连接先行词与它引导的定语从句.（把主句和从句连起来）

关系代词在定语从句中代替主句中的先行词，所以它在一般情况下都跟在先行词之后，而且它的人称、数必须和先行词一致。

① who指人,在定语从句中作主语或宾语。作宾语时，可省略。

The man who is speaking at the meeting is a worker.分解

作主语 The man is a worker.The man is speaking at the meeting.The man(who)I talked with is our teacher.A person who steals things is called a thief.②whom指人,在定语从句中作宾语，可省略。

The woman whom they wanted to visit is a teacher.作宾语分解、The woman is a teacher.They wanted to visit the woman.The man(whom)I nodded to is Mr.Li.③ which 指物，在定语从句中作主语或宾语。作宾语时，可省略。

This is a truck which / that is made in China.分解 This is a truck.The truck is made in China.These are the trees which were planted last year.This recorder（which）he is using is made in Japan.The TV set(which)he bought yesterday is made in Japan.Is this the library(which)you borrow books from? ④that 指人或物，在定语从句中作主语或宾语。作宾语时，可省略。

The man who / that is speaking at the meeting is a worker.作主语分解 The man is a worker.The man is speaking at the meeting.A plane is a machine that can fly.He is the man(that)I told you about.⑤whose指人或物, 在定语从句中作定语。不可省略。I know the girl whose mother is a teacher.分解 I know the girl.The girl’s mother is a teacher.This is the little girl whose parents were killed in the great earthquake.We live in a house whose windows face south.I saw a woman.Her bag was stolen.I saw a woman whose bag was stolen.Please show me the book.Its cover is red.Please show me the book whose cover is red.定语从句三步：

第一找出先行词

第二看先行词在定语从句中的语法功能（做主语、宾语或状

语）

第三选择合适的关系词关系代词的用法注意点

(1)that和which都可以指物，但以下5种情况只能用that 不能用which。①当先行词中有人又有物时。如：

Do you know the things and persons that they are talking about? ②当先行词为不定代词all, one, few, little, no, some, any, everything, nothing, nobody, none等时。如：

This is all that I want from the school.③当先行词被only, just, very, right, last等修饰时。如： This is the very book that I am looking for these days.④当先行词被最高级修饰时。如：

The TV tower is the highest building that has been built in this city.⑤当先行词被序数词修饰时。如：

The first lesson that I learned will never be forgotten.由wh-开头的特殊疑问句

Who is the man that you are talking about? 练习：that 与 which 1)Do you have anything ______ you don’t understand? 2)The only thing _____ we can do is to give you some advice.3)Who is the man _____ is standing there? 4)Her bag, in ________ she put all her money, has been stolen.5)She heard a terrible noise，______ brought her heart into her mouth.(2)that和who都可以指人，但下面两种情况，多用who。①先行词为all, anyone, one, ones等时。如： All who heard the news were excited.②先行词为those, he和people时。如：

Those who want to go please sign your names here.He who does not reach the Great Wall is not a true man.定语从句练习

The foreign guests，were scientists, were warmly welcomed at the airport.A．most of them

B．most of whom

C．most of that

D．most of those He was the very one of the students who

praised at the class meeting.A．was

B．were C．is

D．are The balls are solid，makes them very heavy.it

B．what C．which D．that

The scientist and his achievements

you told me about are admired by us.who

B．that

C．which D． /

He is working hard，will make him pass the final exam.who

B．that

C．which D．it

The museum

we are going to visit is far form our school.where B．that

C．it

D．as

Which of the two sheep

you keep produces more milk?

that

B．which C．what D．they

The weather turned out to be very good，was more than we could expect.B．which

C．that

D．it

Finally, the thief handed everything

he had stolen to the police.which B．what

C．whatever D．that

Tom as well as his friends who

football matches

to school today.likes;hasn’t gone

B．likes;haven’t gone

C．like;hasn’t gone

D．like;haven’t gone We should learn from those

are ready to help others.A．what

A．who

B．whom C．whose D．they 12.I have two brothers，are doctors.A．both of them

B．both of who

C．both of whom

D．both of they 13.Everything

can be done should be done.A．which B．that

C．all

D．where 14.Is oxygen the only gas

helps fire burn?

A．that

B．/

C．which D．what

15.The first place

we visited in that city was a big factory.A．where B．in which C．that

D．which

16.Which is the largest bridge

was built across the river?

A．that

B．which C．where D．on which 17.Please pass me the dictionary

cover is black.A．which B．its

C．whose D．which of 18.This is the very place

I’m wishing to live in.A．where B．which C．that

D．in which 19.She always gives in to those _____ have money.A．in which B．who

C．that

D．which

二、从下框中选择合适的关系代词填空。

that;which;who;whose;不填

初中宾语从句的讲解篇6

引导词主要有以下三种情况：

第一，宾语从句是陈述句的时候，引导词用that，在口语中可以省略。

第二，如果宾语从句是由一般疑问句转换而来的，那么它的引导词就用if或whether。在一般情况下，这两个词可以通用。但是，如果从句中有ornot或者从句充当介词的宾语时，我们只能用whether。

第三种情况，宾语从句是特殊疑问句的时候，引导词就用特殊疑问词。

二、考查宾语从句的时态

英语从句的时态，主要是由主句中谓语动词的时态来决定的，一般分为以下三种情况：

第一，主句的时态为一般现在时、一般将来时或者是祈使句的时候，从句的时态要根据具体的情况，选用相应的时态。

第二，如果主句的时态是过去时，那么从句的时态也要用过去相应的某一时态。

第三，如果从句表示的是客观真理、自然现象或者是普遍真理的时候，从句的时态要用一般现在时。

三、考查宾语从句的语序

宾语从句的语序问题，要注意以下两个方面：

1、在含有宾语从句的复合句中，宾语从句是特殊疑问句的时候，要使用陈述语句。

2、在直接引语变间接引语的时候，如果是will,be, have,can组成的疑问句，在变宾语从句的时候，要把这些词还原，同时要根据主句的时态，做相应的变化；如果是由do, does,did构成的疑问句，在变成宾语从句的时候，要去掉这些词，并且从句的时态要根据主句的时态作出相应变化。

四、考查宾语从句的否定前移

宾语从句的否定前移，要满足两个条件：一个是主句的.主语是I或者是we；第二个条件是主句的谓语动词是think, believe, expect, imagine, suppose等，从句中的否定，要移到主句谓语动词的前面。

五、考查宾语从句的转化

宾语从句的转化有下面四种情况。

1、从句主语和主句主语相同，而且谓语动词是hope, wish, decide等的时候，从句可以转化为不定式结构；如果谓语动词是know, remember ,forget, learn等的时候，从句可以转化为疑问词加不定式结构。

2、当主句的谓语动词是ask, tell, show, teach等的时候，并且从句主语和主句的间接宾语一致，从句也可以转化为不定式结构或者是疑问词加不定式结构。

3、还有些宾语从句，可以转化为复合宾语的结构形式，经常会用到的动词有find, think, make等。

高考语法：表语从句讲解及练习篇7

一、定义：

1.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。

Eg:The problem is puzzling.这问题令人困惑主语连系动词形容词作表语

The problem is when we can get a pay rise.问题是什么时候我们可以得到加薪.主语连系动词一个句子作表语---表语从句

2.连接表语从句的连接词有：that, what, who, when, where, which, why, whether,how.He has become a teacher.他已经成为一名教师。

He has become what he wanted to be ten years ago.他已经成为了他10年前想成为的。She has remained there for an hour.她曾在那里停留了一个小时。

She has remained where I stood yesterday for an hour.她一直在我昨天站的地方站了一个小时。His suggestion is good.他的建议是好的。His suggestion is that we should stay calm.他的建议是，我们应该保持冷静。

The question is when he can arrive at the hotel.问题是，他什么时候可以到达酒店。

who will travel with me to Beijing tomorrow.谁与我明天将前往北京。

why he cried yesterday.昨天他为什么哭。

how I can persuade her to join us in the party.我怎么能说服她加入我们的派对。

whether the enemy is marching towards us.是否敌人正向我们行进.二、注意：

1.表语从句一定要用陈述语序。

False: The question is when can he arrive at the hotel.Right: The question is when he can arrive at the hotel.2.不可以用if，而用whether 连接表语从句(as if 例外）。

引导宾语从句时可以互换if/whether 位于介词后要用whether，位于句首时要用whether 引导表语从句，主语从句，同位语从句时要用whether

False: The question is if the enemy is marching towards us.Right: The question is whether the enemy is marching towards us.Right: It looked as if he had understood this question.3.不像宾语从句，在有表语从句的复合句中，主句时态和从句时态可以不一致。Right: The question is who will travel with me to Beijing tomorrow.Right: The question is why he cried yesterday.4.that在表语从句中不可以省掉。表语从句的基本用法:

表语从句只能置于主句之后，而主句的动词只能是联系动词。名词性从句在be等系动词后作表语时被称为表语从句.例如： The problem is how we can get the things we need.(how 在表语从句中充当方式状语)问题是我们怎样能弄到我们需要的东西。

The scissors are not what I need.(what 在表语从句中充当宾语)这把剪刀不是我所需要的。

What I told him was that I would find him a good play.我告诉他的是我会给他找个好剧本。(what在主语从句中作直接宾语，that作为表语从句的引导词在该表语从句中不充当句子成分，不能省略)

That is what I want to tell you.(what在表语从句中充当直接宾语)那就是我想要对你讲的。

That is why she failed to pass the exam.(why 在表语从句中充当原因状语)那就是她考试不及格的原因。

注意： “That is why...”是常用句型，意为“这就是……的原因/因此……”，其中why引导的名词性从句在句中作表语，该句型通常用于针对前面已经说明过的原因进行总结，又如： That is why you see this old woman before you know, Jeanne.(前文提到Jeanne对老妇人显得苍老憔悴深感诧异，说话人对她讲述了其中的原因之后，用这一句来进行概括)。

下面是两个与“That is why...”形式相似的结构，它们与“That is why...”结构之间的关系要能够辨析清楚：

(1)“That is why...”与“That is the reason why...”同义，只不过从语法结构上讲，“That is the reason why...”中why引导的是—个定语从句，将其中的the reason去掉则与“That is why...”结构一样，例如：

That is(the reason)why I cannot agree.这就是我不能同意的理由。

(2)“That is because...”句型中从属连词because引导的名词性从句在此作表语，这也是个常用句型，意为“这就是为什么……/因为……”。“That is because...”与“That is why...”之间的不同在于“That is because...”指原因或理由，“That is why...”则指由于各种原因所造成的后果，例如：

He did not see the film last night.That is because he had to help his little sister with her homework.昨天晚上他没有去看电影，那是因为他得帮助他的妹妹做作业。(第一句话说明结果，第二句话说明原因)He had seen the film before.That is why he did not see it last night.他以前曾看过那部电影，因此他昨天晚上没有去看。(第一句话说明原因，第二句话说明结果)例题精析：

［考题1］ The traditional view is ____ we sleep because our brain is “programmed” to make us do so.(2007上海)A.when B.why C.whether D.that ［答案］ D ［解析］下划线处之后是包含一个原因状语从句的表语从句，如果看不出它是充当整个句子结构的表语从句将难以把握整个句子的意思。因此，应选择可引导名词性从句且不充当任何成分的that。

［考题2］ You are saying that everyone should be equal, and this is ____ I disagree.(2004)A.why B.where C.what D.how ［答案］ B ［解析］下划线处的引导词引导系动词is后的表语从句并在该表语从句中充当地点状语(“disagree”属于不及物动词，“I disagree”本身是完整的主谓结构)，下划线应填入引导词where，表语从句“where I disagree”的意思是“我不同意之处、我不同意的地方”。

［考题3］ — I drove to Zhuhai for the air show last week.— Is that ____ you had a few days off?(1999)A.why B.when C.what D.where ［答案］ A ［解析］下划线处的引导词引导与系动词is连用的表语从句并在该表语从句中充当原因状语，下划线应填入表示“因此……”(指因某种原因所造成的结果)的引导词why。

［考题4］ ____ she couldn’t understand was ____ fewer and fewer students showed interest in her lessons.(2000上海)A.What;why B.That;what C.What;because D.Why;that ［答案］ A ［解析］第一个下划线处的引导词引导主语从句并在该主语从句中充当宾语，特指她所不理解的事情，应填入关系代词型的引导词what；第二个下划线处表示“因此……”(指因某种原因所造成的后果，由why引导对应的名词性从句)而不是“为什么……”(指原因、理由，由because引导对应的名词性从句)，应填入引导词why。

［考题5］ ____ made the school proud was ____ more than 90% of the students had been admitted to key universities.(2003上海春)A.What;because B.What;that C.That;what D.That;because ［答案］ B ［解析］第一个下划线处的引导词引导主语从句并在该主语从句中充当主语，特指令校方骄傲的事情，应选用关系代词型的引导词what；第二个下划线处引导表语从句表示原因、理由，应由that引导对应的名词性从句。

［考题6］ — Are you still thinking about yesterday’s game? — Oh, that’s ____.(2003北京春)A.what makes me feel excited B.whatever I feel excited about C.how I feel about it D.when I feel excited ［答案］ A ［解析］ A选项的意思是“令我感觉激动的事物”； B选项的意思是“我觉得激动的任何事物”； C选项的意思是“我对它感觉的方式”； D选项的意思是“令我感觉激动的时间”。四个选项中A最适合跟代表“game”的主语that对应，充当表语从句。

表语从句与宾语从句的关系

宾语从句和表语从句都属于名词性从句。其作用跟名词在句中的作用相同。故充当宾语的句子叫宾语从句，充当表语的句子叫表语从句。

宾语从句

(1)对于宾语从句要掌握以下三点

①语序: 从句的语序必须是陈述句语序, 即“主语 + 谓语”这种形式。

②时态: 当主句是一般现在时或一般将来时的时候, 从句可以是任何时态, 而当主句是一般过去时的时候, 从句, 从句时态必须是过去时范围的时态, 即(一般过去时, 过去进行时, 过去完成时, 过去将来时)。

③连接词: 当从句意思完整, 主句意思肯定时, 连接词用that, 且可以省去, 当从句意思完整, 主句意思不确定或含否定含意时, 常用if或whether(是否), 当从句意思不完整时, 连接词则是代替不完整部分的特殊疑问词。

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。

如： What the police want to know is when you enred red the room警察想知道的是你什么时候进的房间。

The The trouble is that we are short of funds困难是我们缺乏资金。

This This is what we should do这是我们应当做的。