初中英语语法——三大从句汇总(重点笔记)讲课教案

1、初中英语语法三从 句 汇 总 （重 点 笔 记 ）精品文档初中英语语法一一三大从句汇总在英语中，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

2、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：先行词主格宾格所有格人 who whom whose物 which which whose of which人、物 that th

3、at 一（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 teacherwho taught us chemistry in thefirst year of my senior middle school. 我将永远不会忘记在高一时教我Anyone who wants to apply for this job must send us the resumeby email

4、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。whom弋替人，是宾格，在定语从句作宾语，在非正式英语常可省略。例 如：Do you know the gentleman whom we met in the school library yesterday ?昨天我们在学校图书馆里遇到的那位先生你认识吗？This is the student whom my father taught ten years ago. 这是我 爸爸十年前教的学生。The girl who I saw is called Mary.我见到的那个女孩名叫玛丽。（在非正式英语中，主格 who代替

5、了宾格whom亦可省略）whose一般代替人，有时亦可代替物，是所有格，在定语从句作定语。例如:The girl student whose father is a senior engineer used to study abroad.其父是一位高级工程师的那个女学生过去在国外留学。Do you know the name of the hotel whose window we can see here?我们这儿能看到窗户的那个宾馆叫什么名字，你知道吗？（关系代词whose指代先行词 hotel , 正式用法应该用 of which 。 whose window=the window o

6、f which , 意思是：the window of the hotel 。）（二）关系代词which的用法which代替物，在定语从句作主语或宾语，作宾语时还可省略。例如：I do not like stories which have unhappy endings.我不喜欢有不幸结局的小说。（which可以换成that ）Tom works for a factory which makes watches.汤姆在一个制表厂工作。（which可以换成that ）（三）关系代词that的用法that既可指人又可指物，在当代英语中大多指物，在定语从句作主语或宾 语，作宾语时还可省略。例如：

7、Is she the girl that sells newspapers?她是卖报纸的那个女孩吗？ （ that可以换成who）Where is the ice-cream that was in the fridge?放在冰箱的冰激凌哪儿去了？ （ that可以换成which）Is this the book that you want to buy?这是你要买的那本书吗？（that可以换成which,在定语从句作宾语,还可以省略）三、关系副词引导的定语从句常用的关系副词只有三个：when, where, why ,在定语从句中充当时间、 地点和原因状语。它们的用法大家不妨记住一个口诀：t

8、he time whenthe place wherethe reason why（一）关系副词when的用法关系副词when代替的先行词表示的是时间，when在定语从句作时间状 语。例如：In Beijing July and August are the months when it rains very often.北京的七月和八月是常下雨的月份。（when先行词是months）Do you remember the day when we first went to the Summer Palace?你还记得我们第一次去颐和园的那一天吗？ （ when先行词是day,当代 英语里wh

9、en可以用that替代，这时关系代词that就变成了表示时间的关系 副词）I haven ' t s een her since the year when I left Tokyo.自从我离开东京的那一年我就一直没见到过她。（when先行词是year,同样when可以用that代替）（二）关系副词where的用法关系副词where代替的先行词表示的是地点，where在定语从句作地点状 语。例如：During the Spring Festival I went back to the town where I was brought up.春节期间，我回到了生我养我的家乡。（wher

10、e的先行词是town）This is the place where Li Bai once lived.这是李白曾经生活过的地方。（where先行t是place）上面这个句子不可以将 where改为that ,因为that不能作为表示地点的 关系副词。试比较下句：This is the place that Li Bai once visited.这是李白曾经游览过的地方。（that的先行词同样是place，但这个that 是关系代词，在定语从句中作宾语，可以省略，还可以用 which替换）（三）关系副词why的用法关系副词why代替的先行词表示的是原因，why在定语从句作原因状语。 例如：

11、The reason why I am phoning you is to ask you whether you have got my email.我打电话给你的原因是想问问你是否收到了我的电子邮件。（ why先行词 是reason ,当代英语里why可以用that替代，这时关系代词that就变成 了表水原因的关系副词，还可以将 why省略）This is the reason why he came late to school.这就是他为什么上学迟到的原因。（why先行词是reason , why可以用 that替代，还可以省略）表语从句，句子意思丝毫未注意：如果上面的句子将the r

12、eason省略，那么这个句子就变成了(This is why he came late to school.变。四、特殊关系代词as引导的定语从句as是个比较特殊的关系代词，一是用在某些句型搭配里，二是独立于主句 之外。下面分别讲解。（） 在固定搭酉己 asas, so as, such as, the same as 中，as弓I 导定语从句You may take as many books as you want.你想要拿多少书就拿多少。（第一个 as是副词，修饰many的；第二个as 才是关系代词，代替先行词books,在定语从句中作宾语）I have got such a compu

13、ter as yours.我有一台你这样的电脑。（as是关系代词，代替先行词computer,在定 语从句中作表语，因为yours后省略了 is ）I have never seen so beautiful a place as Guilin.我从未见过像桂林那样美丽的地方。（as是关系代词，代替先行词 place ,在定语从句中作表语，因为 Guilin后省略了 is ）（二）独立于主句之外，as引导定语从句As we know,the earth turns around the sun.正如我们所知，地球围绕太阳旋转。As is known to us,（As we know和As i

14、s known to us均为定语从句，as分别作宾语和主语，替代后面的主句。）Taiwan is, as you know, is an inseparable part of China.你知道，台湾是中国不可分割的一部分。（关系代词as指代整个主句，在定语从句中作宾语。）五、关系代词who, which与that的区别（一）关系代词who与that的区别1 .当关系代词用作主语时，多用主格 who,例如：He who loses hope loses all.失去希望的人就失去一切。（先行词为代词he, they, any, all, one 等时，多用who）I met Alice,

15、who told me that she was learning Chinese.我遇见艾丽斯，她告诉我她在学汉语。（在非限制性定语从句中，用 wh02 .当关系代词用作介词后的宾语时，用宾格 whom不用that。例如：The man to whom our headmaster talked just now is our English teacher.我们校长刚才与他谈话的那个人是我们的英语老师。（介词与关系代词紧 密相连时，只能用宾格 whom不可用主格who）注意：介词与关系代词不是紧密相连时，或者说介词放在句子后面时，这 时可以用主格who,也可用that ,还可以省略关系代词

16、。因此，上面的这句 话还可以有如下四种说法：(1) The man whom our headmaster talked to just now is our English teacher.(2) The man who our headmaster talked to just now is our English teacher.(3) The man that our headmaster talked to just now is our English teacher.(4) The man our headmaster talked to just now is our Engl

17、ish teacher.第4句简洁、自然，所以口语中用得最多。(5) 关系代词泛指人时，多用that。例如：He is a man that is never afraid of failure.他是个从不怕失败的人。(that用来泛指人)(6) 关系代词出现在who开头的疑问句时，应用that。例如：Who is the girl that is talking to Tom in English?用英语同汤姆交谈的那个女孩是谁？(避免重复使用who,以免造成误解或语义含混不清)(二)关系代词which与that的区别1 .当先行词为 all, much, little 以及不定代词 any

18、thing, something, everything等时，关系代词多用that。例如：All that glitters is not gold.闪闪发光物，未必尽黄金。She told me everything that she knew.她把她所知道的一切都告诉了我。the only, the2 .当先行词的前面有形容词最高级、序数词或限定词 very, all, every, any, no 等时，关系代词一般都用that。例如：This is the best novel that I have ever read.这是我读过的最好的一部小说。He is the only per

19、son that has been invited to the ball.他是惟一应邀参加舞会的人。3 .当关系代词出现在which开头的疑问句时，应用that。例如：Which was the hotel that was recommended to the foreign guest? 哪一个是推荐给外宾的宾馆？（这里使用that很明显是为了避免重复which）4 .在非限制性定语从句中，关系代词一般只用which。例如：Beijing, which is the capital of the People' s Republic of China,will host the

20、2008 Olympic Games.北京是中华人民共和国的首都，将主办2008年奥运会。5 .介词后的关系代词用 which,而不用that。例如：She has collected 600 stamps, 60% of which are German stamps. 她 收集了 600张邮票，其中60%是德国邮票。六、定语从句的位置如前所述，定语从句一般总是直接置于所修饰的名词或代词之后。有 时候，定语从句与先行词之间插入了其他的短语，这样它们被分隔了，这种 情况下的定语从句被称作隔离定语从句。例如：There was a girl upstairs who was shouting a

21、nd crying, obviously mad.楼上有一个女孩，大喊大叫。很明显，她疯了。（定语从句who wasshouting and crying 修饰 the girl , 被 upstairs 所隔开）A new master will come tomorrow who will teach you German.明天要来一位新老师教你们德语了。（定语从句置于句末以示强调）B、宾语从句宾语从句是英语复合句中的其中非常重要的从句之一。它是用一个句子 做另一个句子的宾语，将这个句子叫做宾语从句。宾语从句做介词或及物动 词的宾语。现在从下列三个方面总结归纳如下：一，引导词Aj 由tha

22、t引导的陈述句性的宾语从句，在很多动词如 say, think, wish , hope, see, believe, agree, expect, hear , feel动词后。连词 that只起连 接作用，在从句中不做句子的成分，也无词汇意义，在口语中常被省略，但 在大多数情况下还是以不省为好，特别是在笔语中。例：I told him that he was wrong.l在think,believe, suppose, expec等动词引起的宾语从句中，有时谓 语尽管是否定意义，却不用否定形式，而将think等动词变为否定形式。例：I don ' t think you are

23、rig俄认为你做的不对）l在许多带有复合宾语的句子中，that引导的宾语从句经常移到句 子的后面，而用it做形式宾语。例： We think it wrong that he told a lie to everyone 俄;认为他向每一 个人撒谎是错误的）B:由连词if、whether引导的表示 是否”的宾语从句。 Whether,if在从句中不做句子的成分，一般情况下，whether和if可以替换。例：I don ' t know if/whether he will come tomorrow.The teacher asked if/whether we had finishe

24、d the experiment.l在介词后面的宾语从句中不用if引导例：Everything depends on whether we have enough moneyl宾语从句中有or not时不用if引导.例：I don ' t know whether the movie star will come or not.l和不定式连用作宾语时不用if引导.例： Whether to go there or not hasn ' t bden decideC 由wh-引导的宾语从句。连接代词 who,whom,whose, what, which,和连接副词when, w

25、here, why, how等连接的宾语从句，它们在句中即 有连接从句的作用，又在句中充当句子的成分。例：Do you know which film they are talking about? （which 做定语）I don ' t know where he lives. （wherefe点状语）二：宾语从句的语序，宾语从句从句的语序必须是陈述语序，既 连接词+主语+谓语+其他 成分例：I believe that they will come soon.He asked me whether I was a teacher.They wanted to know what

26、they can do for us.三：宾语从句的时态。宾语从句的时态受主句的限制，既：主句是一般现在时态，从句根据实际情况而定。主句是一般过去时态，从句用相应的过去的时态。如果从句的动作 发生在主句之前，则从句要用过去完成时态。例：1)She says that she is a student.She said that she was a student.2)She says that she will fly to Japan in a week.She said that she would fly to Japan in a week.3)She says that she ha

27、s finished her homework already.She said that she had finished her homework already.4)She says that she can sing a song in English.She said that she could sing a song in English.l如果宾语从句说的是客观真理、自然现象或事实时，这时宾语从 句要用一般现在时态。例：The teacher said that the earth goes round the sun.He told me that Japan is an i

28、sland country.lCould you tell me 是用来征询对方的意见，语气委婉，并不表示 过去。例：Could you tell me when we will visit the Histury Museum?注意事项：u由陈述句变成宾语从句时，要注意人称的变化。例：She said: "I have been to England before. ”She said that she had been to England before.She asked me: " Do you like maths? ”She asked me if I like

29、d maths.u宾语从句与简单句的交换。由连接代词和连接副词引导的宾语从句，如果宾语从句的主语和主 句的主语是同一个人时，可以用疑问词+不定式”做宾语的简单句结构。例：I don ' t know what I should do next.I con ' t know what to do next.He didn ' t know where he would live.He didn ' t know where to live.DO SOME EXERCISES:I.Can you see?A. what he ' s reading B. w

30、hat is he readingC. what does he read D. he reads what2 .Does Jack come from Japan? Do you know?（r并成一个句子 ）Do you know Jack from Japan?3 ._What did your son say in the letter?_He told me that he the Disney would the next dayA.will visit B. has visitedC. is going to visit D. would visit4 .He didn '

31、; t knowA.what ' s the matter B.what the matter isC. what was the matter D. what the matter was5 .Somebody called you just now,but I didn' t knowA.who were they B. who they wereC. who was it D. who it was6 .I want to knowA.what is his name B. what ' s his nameC. that his name is D. what

32、his name is7 .-Could you tell me she is looking for?-Her cousin,susan.A.that B.whose C .who D.which8 .-What are you searching the Internet for?-1 ' m trying to find out.A.What is the difference between SARS and BIRDFLUB.How many persons have died in IraqC.How to protect our environmentD.Why is o

33、ur Chinese team be able to beat Korea9 .Do you know?傩正在唱歌）10 .Do you know?她正在和谁谈话）11 .Do you know?（乍天发生了什么事） The keys: 1 A.2 if ,comes.3D. 4 C. 5 D. 6 D. 7 C. 8 B 9 who is singing10 who she is talking with11 what happened yesterdayC、同位语从句（一）概念一般来说，在主从复合句中，用作同位语的从句叫同位语从句。它通常 跟在某些名词之后，用以说明或解释该名词表示的具体内

34、容。可以跟同位语 从句的名词通常有： advice, decision, fact, hope, idea, information, message, news, promise, proposal, reply, report, suggestion, word消息），problem, question, doubt, though蹲。例如：They were delighted at the news that their team had won.当听到他们队获胜的消息时，他们欣喜若狂。Where did you get the idea that I could not come 你

35、从哪儿听说我不能来？有时同位语从句可以不紧跟在被说明的名词后面，而被别的词隔开。如：The thought came to him that Tom might have returned the book.他突然想起汤姆可能已经还了书了。（二）引导词寻规找矩请仔细观察下列句子，注意从句引导词的用法。1. The news that Mr. Li will be our new English teacher is true.2. He hasn ' t made the decision whether he will go there.3. The question who sho

36、uld do the work is being discussed at the meeting.4. I have no idea what the boy is doing in the next room now.5. We haven ' t yet settled the question where we are going to spend our summer vacation this year.6. I have no idea how I can get to the railway station.7. I have no idea when he will

37、be back小结归纳that引导同位语从句时无词义，也不充当任何成分，但通常不可以省略， 如句1;whether引导同位语从句时意为 是否"，通常不能用if来代替，如句2;连接代词who, what等可以引导同位语从句，如句 3, 4;连接副词where, how, when等可以引导同位语从句，如句5, 6, 7。（三）that引导的同位语从句和定语从句意义不同：同位语从句用来进一步说明前面名词的内容；而定语从句用 来修饰、限定前面的先行词。试比较：1. The news that our team has won the final match is encouraging.2

38、. The news that you told us is really encouraging.分析句1中that引导同位语从句，说明“new用勺内容：我们队取得了决赛 胜利。句2中that引导定语从句，对“new到口以限定：是你告诉我们的，而非 来自其他渠道。that的功能不同：that引导同位语从句时是一个纯连词，不充当任何成 分；而引导定语从句时，不仅起连接作用，而且还指代先行词并在从句中充 当主语、宾语等成分。试比较：1. Dad made a promise that he would buy me a CD player if I passed the English test

39、.2. Dad made a promise that excited all his children.分析句1中that弓I导同位语从句，其中that无词义，也不充当任何成分；句2中that引导定语从句，that指代promise,又在从句中充当主语，且 that可以用which替换。可否省略：that在引导同位语从句时，通常不可省略。在引导定语从句 时，若在从句中作宾语，通常可以省略，若作主语则不可以省略。即学即用I .请用适当的词填空，使下列句子意思完整。1. They expressed the hope they would come over to China soon.2. T

40、he fact he didn ' t see Tom this morning is true.3. Word has come some American guests will come to our college for avisit next week.4. He can ' t answer the question he got the money from his homeyesterday.5. Do you have any idea is actually going on in the classroom?6. The problem we shoul

41、d have the meeting in the hall now must bedecided at once.II .下列各句中均有一处错误，请改正。1. Our team has won the game, that made us very happy.2. I ' ve come with a message from Mr Wang how he won ' t be able to see you afternoon.3. He must answer the question if he agrees with what she said or not.4.

42、I ' ve read the book where you gave me the day before yesterday.5. One of the men held the pinion when what the book said was right.III .把下列句子翻译成英语。1 .我向他许诺说我一到北京就给他写信。2 .他经常问我这个问题，那就是这个工作是否值得做。3 .他什么也不说，这一事实使大家都感到惊奇。4 .在我看来，他刚才告诉我的这个消息是真实的。5 .他突然想起他本来应该去接儿子的。Key:I. 1. that 2. that 3. that 4. ho

43、w 5. what6. whetherII. 1 that which 2. how that 3. ifwhether4. where that / whi域省略 where5. when that 6. that howIII. 1. I made a promise that I would write to him as soon as I got to Beijing.2. He often asked me the question whether the work was worth doing.3. The fact that he had not said anything

44、surprised everybody.4. In my opinion, the news (that / which) he told me just now is true5. A thought suddenly came to him that he should have picked up his son.D、状语从句的种类§1状语从句的种类用来修饰谓语动词、其它动词、定语、状语或整个句子的从句叫做状语从句。状语从句可分为：1.时间状语从句2.地点状语从句；3.原因状语从句；4.条件状语从句；5.目 的状语从句；6.让步状语从句；7.比较状语从句；8.程度状语从句；9.

45、方式 状语从句；10.结果状语从句。§2状语从句的时态特点一般情况下，时间和条件状语从句的谓语动词一般用人般现在时”表示 工般将来时”，用现在完成时”表示将来完成时”。二时间状语从句§3 时间状语从句(adverbial clause of time )1 .由when, while, as引导的时间状语从句。【区别】when, while和as的区别：when引导的从句的谓语动词可以是延 续性的动词，又可以是瞬时动词。并且 when有时表示就在那时”。While引导的从句的谓语动作必须是延续性的，并强调主句和从句的动作同 时发生（或者相对应）。并且 while有时还可以表

46、示对比。例如：While my wife was reading the newspaper, I was watching TV. （was reading 是延续性的动词， was reading 和 was watching 同时发生）As表示2边一边”，as引导的动作是延续性的动作，一般用于主句和 从句动作同时发生；as也可以强调 人先一后。As we was going out, it began to snow. 当我们出门时，开始下雪了。 （ as 强调句中两个动作紧接着先后发生，而不强调开始下雪的特定时间）2 .由before和after引导的时间状语从句。注意 before引

47、导的从句不再用否 定式的谓语，并且当before引导的从句位于主句之后，有时译成 就，才”。 还要注意主句和从句之间的时间关系。当主句用将来时，从句总是用现在 时；如果before引导的从句谓语用的是过去时，则主句动词多用过去完成 时，这样以便体现动作发生的先后。After表示主句动作发生在从句动作之后。主句和从句的动作的时间关系正好与before引导的从句相反。3 .由till或until引导的时间状语从句。till和until 一般情况下两者可以互 换，但是在强调句型中多用until。并且要注意的是：如果主句中的谓语动 词是瞬时动词时，必须用否定形式；如果主句中的谓语动词是延续性动词 时，

48、用肯定或否定形式都可以，但表达的意思不同。例如：4 .由since引导的时间状语从句。since引导的从句的谓语动词可以是延续 性的动词，又可以是瞬时动词。一般情况下，从句谓语动词用一般过去时， 而主句的谓语动词用现在完成时。但在 It is +时间+ since从句的句型中, 主句多用一般现在时。例如：5 .由 as soon as, immediately, directly, instantly, the moment, the instant, the minute,等引导的时间状语从句。这些连词都表示工就”。【注意】 hardly(scarcely, rarely) when / b

49、efore, no sooner栅a于as soon as之意。主句用过去完成时，从句用一般过去时。当 hardly, scarcely, rarely和no sooner位于句首时，主句应用倒装语序。6 .由by the time引导的时间状语从句。注意时态的变化：在一般情况下， 如果从句的谓语动词用一般过去时，主句的谓语动词用过去完成时；如果主 句的谓语动词用一般现在时，主句的谓语动词用将来完成时。7 .由each time, every time 和whenever引导的时间状语从句。8 .由as long as和so long as引导的时间状语从句。这两个连词表示有多久就多久”。三地

50、点状语从句§4 地点状语从句 (adverbial clause of place)地点状语从句一般由连接副词 where, wherever等引导，已经形成了固定的 句型，例如：句型1 : Where +地点从句，(there) 十主句。【注意】此句型通常译成 哪里哪里就”；主句在从句后面时，there 可用可不用；如果主句在从句的前面时，一般都不用 there。句型2： Anywhere/ wherever +地点从句,十主句。状语从句是句子的状语由一个从句充当，来修饰主句中的动词，形容词或副 词等。状语从句都由从属连词引导，与主句连接，放在句末时，一般不在前 面加逗号。状语从句

51、根据它表示的意思可分为时间，原因，条件，比较，结果，目的等 类。时间状语从句： 是由 when, as, while, after, before, since, until, as soon as 等从属连词引导的状语从句。时间状语从句中的谓语动词不能用一般将来时，只能用一般现在时表示将来 发生的动作或存在的状态。原因状语从句： because, since, as 和for都表示原因。because 语势最 强，回答why提出的问题，用来说明人所不知的原因。当能够很明显的看 出原因或人们已知原因，就用 as或since。由because引导的从句如果放在句末，且前面有逗号，则可以用for来

52、代替。但如果不是说明直接原因，而是多种情况加以推断，就只能用 for。目的状语从句：表示目的状语的从句可以由in order that, so that,等词引导。结果状语从句：结果状语从句常由 sothat或suchthat引导，要掌握和 区分这两个句型，首先要了解so和such后面分别跟什么词。such是形容词，修饰名词或名 词词组，so是副词，只能修 饰形容词或副词。so还可与表示数量的形容词 many, few, much, little 连 用，形成固定搭配。如：The box is so heavy that I can't carry it.让步状语从句：是由though

53、, although 引导的状语从句。E、表语从句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。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：Theproblem is how we can get the things we need.问题是我们怎样能弄至 U我们需要的东西。（how在表语从句中充当方式状语）/ The scissors are not what I need.这把剪刀不是我所需要的。（what在表语从句中充当宾 语） Wha

54、t 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 iswhat I want to tell you.那就是我想要对你讲的。（what在表语从句中充当直接宾语）/ That is why she failed to pass the exam.那就是她考试不及格的原因。（why在表语从句中充当原因状语）“That is why.是常用句型， 意为 这就是的原因/因此工 其中why引导的名词性从句在

55、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 womanbefore you know, Jeanne. 珍妮，这就是现在这个老太婆出现在你面前 的原因。（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）。/ That is why I came.这就是我来的原因。下面是两个与“That is why.形式相似的结构，它们与“That iswhy.结构之间的关系要能够辨析清楚：（1） “That is why.与”“That is the reason why.

56、同义， 只不过从语 法结构上讲，“That is the reason why.中why引导的是一个定语从句，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，“T

57、hat 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）考题1The traditional view is we sleep because our brain is“ program