reason在定语从句中的用法
when引导的定语从句的用法
when/where/why引导的定语从句的用法when， where， why属于关系副词，都在其引导的定语从句中充当状语，其具体用法如下：1. 关系副词 when引导定语从句（包括限定性定语从句和非限定性定语从句）修饰表示时间的先行词，在定语从句中充当时间状语。
例如： I still remember the day when I first met Jennifer.我仍然记得第一次见到詹妮弗的那一天。
// Next month, when you’ll spend your summer holidays in your hometown, is approaching. 下个月即将来临，届时你们将在家乡度暑假。
2. 关系副词where引导定语从句（包括限定性定语从句和非限定性定语从句）修饰表示地点的先行词，在定语从句中充当地点状语。
例如： This is the office where he worked. 这就是他工作过的办公室。
// She is going to live in Macao, where she has some close friends. 她要到澳门去定居，在那里她有几个密友。
3. 关系副词why引导限定性定语从句修饰先行词reason，在定语从句中充当原因状语。
例如： I don’t know the reason why he came so late. 我不知道他来得那么晚的原因。
// That is the reason why I don’t want to go. 那就是我不想去的理由。
// He didn’t tell me the reason why he was so upset.他没有告诉我他为什么那样心烦意乱。
注意：关系代词与关系副词之间并非毫无关联，两者之间存在密切的联系。
在备考中尤其要注意以下几点：1. 很多情况下关系副词用“介词＋which/whom”来代替，其中的介词由先行词或定语从句中谓语动词的形式来决定，例如：The day when I met the famous pop star was the greatest day of my life.= The day on which I met the famous pop star was the greatest day of my life.见到这位著名歌星的那天是我一生中最重要的日子。
通过高考题精讲定语从句中先行词是reason不用why
通过高考题精讲定语从句中先行词是reason不用why(2002上海春)Is this the reason __________ at the meeting for his carelessness in his work?A. he explainedB. what he explainedC. how he explainedD. why he explained解析：选A. 本题是个定语从句。
Is this the reason __________ at the meeting for his carelessness in his work?A. he explainedB. what he explainedC. how he explainedD. why he explained现改成陈述句：This is the reason_________ at the meeting for his carelessness in his work.先行词是the reason, 所以我们第一想到关系副词why。
但是关系词在定语从句中，却用作宾语：he explained the reason，这样我们应该用关系代词。
可是本题却没有that，或是which，因为作宾语，可以省略，所以本题可以改成这样：This is the reason that/which he explained a t the meeting for his carelessness in his work.=This is the reason he explained at the meeting for his carelessness in his work.意为：这就是他在会上为工作粗心而解释的原因。
定语从句的用法
定语从句的用法定语从句，一个简单句跟在一名词或代词后(先行词)进行修饰限定，所以叫做定语从句。
在主句中充当定语成分。
那么你知道定语从句的用法吗?下面跟着店铺一起来学习一下，希望对大家的学习有所帮助!一、基本概念：在复合句中，修饰某一名词或代词的从句叫定语从句。
如：Do you know the man who spoke at the meeting just now?That is the house where he lived ten years ago.定语从句所修饰的词叫先行词;定语从句一般用关系代词或关系副词来引导，关系词放在先行词与定语从句之间起连接作用，同时又作从句中的一个成分。
引导定语从句的关系代词有：that, who, whom, whose, which;关系副词有：when, where, why.二、关系词的用法：(一)关系代词的用法：1. 作主语用who, which和that, 如：He is the man who/that lives next door.The train which/that has just left is for Shenzhen.2. 作宾语用whom, who, which, that, 如：The man (whom/who/that) we have just seen is a famous writer.Where is the book (which/that) I bought last week?注：在非正式文体中，用于指人的关系代词who whom, that 通常可以省略，但在正式文体中通常用whom, 不可省略;用于指物的关系代词which和that 在非正式文体中也通常省略，但在正式文体中一般不省略。
3. 作定语用whose, 如：(a) He is the man whose car was stolen last week.(b) It was a meeting whose importance I did not realize atthat time.注：“whose +名词中心词”这一结构在定语从句中既能作主语(如上a句)，又能作宾语(如上b句)。
高中英语语法知识总结：定语从句
高中英语语法知识总结：定语从句下面就是小编给大家带来的高中英语语法知识总结：定语从句，希望能帮助到大家!高中英语语法知识总结：定语从句易错点1 关系代词与关系副词的混用1.定语从句相当于一个形容词，起定词作用，修饰名词或代词2.定语从句的引导词的三种功用:( 1)引导定语从句(2)替代先行词(3)在定语从句中充当一定的成分。
3.解题要领:根据定语从句中所缺成分来确定是用关系代词还是关系副词，决不要因先行词是时间名词就用when，是地点名词就用where。
易错点2 关系代词who、whom、whose的误用对于定语从句关系词的考查，首先要确定从句是什么类型的从句，然后再分析关系词在从句中的成分，最后选择正确的词。
要求考生具有一定的句子分析能力，和理解能力。
如果缺少主宾表，要用that或which，缺少状语用关系副词when，where，why，缺少定语用whose。
易错点3 关系代词that和which的误用只用which，不能用that的情况(1) 在介词提前到关系代词之前形成"介词+关系代词"结构来修饰表事物的先行词时，关系代词必须用which.如：☞The house in which we live is very large. 我们住的房子非常大。
这就是老师正在谈及的那本参考书。
注意：如果介词不放在修饰事物的限定性定语从句的句首，which就可换为that，如：☞This is the question which/that we’ve had so much discussion about. =This is the question about which we’ve had so much discussion. 这就是我们已经多次讨论过的问题。
(2) 先行词为"those+表事物的复数名词"时，关系代词通常只用which而不用that。
如：☞Students should keep in mind those regulations which restrict their behavior.学生应牢记那些规范自己的行为准则。
定语从句中关系副词的用法
定语从句中关系副词的用法关系副词，是联系先行词和定语从句的词，属于副词。
定语从句中的关系副词有三个：when, where和why，它们在定语从句中分别作时间、地点和原因状语。
其句法结构如下：1.表时间的名词 + when + 定语从句when指时间，在定语从句中作时间状语。
例句：I still remember the day when I first came to Beijing.I’ll never forget the day when I joined the army.2.表地点的名词 + where + 定语从句where指地点，在定语从句中作地点状语。
例句：The factory where his father works is in the west of the city.This is the house where I lived two years ago.3.表原因的名词reason + why + 定语从句(why只用于reason之后的限制性定语从句中,在定语从句中作原因状语。
)例句：That is the reason why I did the job.(在现代英语中why 可以省略)上句也可以这样表示：That is the reason I did the job.又如：This was the reason (why )we raised the temperature. 关系副词在定语从句中的用法看似简单，以下注意点不可忽视：1）“when”、“where”和“why”的运用取就于表时间的名词、表地点的名词和表原因的名词reason在定语从句中所作的成分，比较下面的几组句子：*I will never forget the day when I first met you on the beach. *I will never forget the days which/that we spent together in Xueyao Middle School.**This is the hospital where my mother works.**This is the hospital which/that we visited the day before yesterday.***The reason why he did not go to school is that he was ill. ***This is the reason which/that he gave his boss in the office .2) “when”、“where”和“why”都可以替换成“介词 + which”，介词的选用取就于先行词和定语从句中的动词。
英语的定语从句总结
英语的定语从句总结英语的定语从句总结所谓定语从句，就是在复合句中起定语作用以修饰主句中的名词或代词的从句。
下面是小编分享给大家的英语的定语从句总结，希望对大家有帮助。
英语的定语从句总结1一、关系代词引导的定语从句1、由who, whom, that，Whose引导的从句这些词代替的先行词是人的名词或代词，who作主语指人，whom作宾语指人，that既可作主语又可作宾语(作宾语可以省略)，可以指人也可以指物。
Whose 用来指人或物，只用作定语。
(1) Is he the man who/that wants to see you? 他是那个想见你的男人吗?(who/that在从句中作主语)(2) He is the man whom/ that I saw yesterday. 他就是我昨天见的那个人。
(whom/that在从句中作宾语)(3) The man whom you spoke to just now is our English teacher 你刚刚说话的那个男人是我们的英语老师(4) he man whose son is a doctor is our professor. 那个儿子是医生的男人是我们的教授。
2、由which, that引导的从句它们所代替的先行词是事物的名词或代词，在从句中可作主语、宾语等，作宾语时可以省略，例如：(1) Prosperity which / that had never been seen before appears in the countryside. 农村出现了前所未有的繁荣。
(which / that在从句中作主语)(2) The package (which / that) you are carrying is about to come unwrapped. 你拿那个包裹快要散开了。
(which / that在从句中作宾语)注意：代表物时多用which，但在下列情况中用that而不用which：a)先行词是anything, everything, nothing , none等不定代词时;b)先行词由every, any, all, some, no, little, few, much等修饰时，这时的that常被省略;c)先行词前有序数词或被形容词最高级修饰时;d)先行词中既有人又有物时;e)整个句中前面已有which，who,that时;f)当先行词为物并作表语时;g)先行词为one时;h)先行词同时又被the only,the very,the same修饰时;二、关系副词引导的定语从句1、when指时间在定语从句中做时间状语也可做连接词用I still remember the day when I first came to the school.2、where指地点在定语从句中做地点状语 Shanghai is the city where I was born.3、why指原因在定语从句中做原因状语，用在reason 后面。
定语从句句知识点总结
定语从句句知识点总结基本结构定语从句由关系代词和关系副词引导，其基本结构如下：关系代词：who, whom, whose, which, that关系副词：when, where, why关系代词的用法1. 关系代词作宾语The man who(m) I met yesterday is a doctor.昨天我遇到的那个人是一名医生。
这里的定语从句“whom I met yesterday”修饰先行词“the man”，在句中作宾语。
2. 关系代词作主语The book that I borrowed from the library is very interesting.我从图书馆借来的那本书很有趣。
定语从句“that I borrowed from the library”修饰先行词“the book”，在句中作主语。
3. 关系代词作表语The reason why he was late is that his car broke down.他迟到的原因是他的车坏了。
定语从句“why he was late”修饰先行词“the reason”，在句中作表语。
4. 关系代词作定语The girl whose mother is a teacher is my best friend.那个母亲是老师的女孩是我最好的朋友。
定语从句“whose mother is a teacher”修饰先行词“the girl”。
关系副词的用法1. 关系副词引导地点状语从句This is the hotel where we stayed last year.这就是我们去年住过的旅馆。
定语从句“where we stayed last year”修饰先行词“the hotel”。
2. 关系副词引导时间状语从句He remembered the day when he first met her.他记得他第一次见到她的那天。
定语从句中的关系副词
定语从句中的关系副词定语从句中的关系副词关系副词，兼有副词与连接词两种作用，在不及物动词的连接中要求用关系副词。
下面是店铺带来的定语从句中的关系副词，希望对你有帮助。
定语从句中的关系副词有三个：when, where和why，它们在定语从句中分别作时间、地点和原因状语。
其句法结构如下：1. when指时间，在定语从句中作时间状语。
例句：I still remember the day when I first came to Beijing.I’ll never forget the day when I joined the army.2. where指地点，在定语从句中作地点状语。
例句：The factory where his father works is in the west of the city.This is the house where I lived two years ago.关系副词“when”、“where”既可引导限制性定语从句，也可引导非限制性定语从句。
例如：I will always remember the day when I first visited the Great Wall.He came to Shanghai in 1980, when he was only 12.I don’t know the exact spot where they will meet.Mr Wang will fly to Beijing, where he will stay for three months.有时关系副词“when”、“where”引导的限制性定语从句和先行词有间隔的现象，是为了平衡句子的语法需要。
Do you remember one afternoon ten years ago when I came to your house and borrowed a diamond necklace?The days are gone forever when the Chinese people used“foreign oil.”.3. why只用于reason之后的限制性定语从句中,在定语从句中作原因状语。
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reason在定语从句中的用法
例句1：The reason why he could not go there was that his grades were too low.
The reason why...is that... 这是特定句型, why引导定语从句,is后的用词为that,一般不用because.又如：
例句2:The reason why she did it is that she wouldn’t let her parents feel disappointed.她做那件事是因为她不想让父母失望。
该句中的why引导一个定语从句，而that引导表语从句。
(1) 句中that引导的表语从句说明主语reason的具体内容
注意以下两种结构：
①The reason is / was that …当主语是reason / cause时，一般不能用
because或why引导表语从句，以免造成语意重复。
The reason why/for which(也可以省去) he was late was that he got up late.
他迟到的原因是他起床晚了。
②当主语是This / That时，可以由because / why引导表语从句。
He got up late. That was why he was late for class.
He was late for class. That was because He got up late.
(2)why在句中是关系副词，引导定语从句，修饰先行词reason，同时它在定语从句中作状语，此时why = for which，但要注意：关系词在定语从句中做主语或宾语时，要用关系代词that或which。
The reason why/for which(也可以省去) he was late was that he got up late.
他迟到的原因是他起床晚了。
The reason that/which/(也可以省去) he gave you was reasonable.
他给你的理由是合理的。
【练习】
-- I drove to Zhuhai for the air show last week.
-- Is that ____ you had a few days off?
A. why
B. when
C. what
D. where
变式①Is this the reason ____ at the meeting for his carelessness in his work?
A. he explained
B. what he explained
C. how he explained
D. why he explained
变式②The reason ____he failed to pass the exam was ____ he never studied hard.
A. why what
B. because that
C. why that
D. why because
变式③Is this the reason _____ he was punished? Which of the following is wrong?
A. why
B. for which
C. 不填
D. that。