江苏牛津高中英语模块一重点语法 定语从句详解
定语从句基本知识
一。定语从句与引导词
定语从句是在复合句中修饰某一名词或代词的从句。被修饰的名词或代词叫做选行词，而引导定语从句的词叫引导词，有关系代词和关系副词两类。
关系词一共有九个，它们在从句中所充当的句子成分见下表。
关系词
主语
宾语
表语
定语
状语
说明
that
人/物
人/物
√
×
√
不能用于非限定性从句
which
物
物
×
×
√
可用于非限定性从句
who
人
×
×
×
×
whom
×
人
×
×
×
whose
×
×
×
人/物
×
when
×
×
×
×
√
where
×
×
×
×
√
why
×
×
×
×
√
as
主要用于非限制性的定语从句和such…as, the same…as, as…as,结构中。
懂得什么样的先行词后用什么样的引导词是学好定语从句的关键。
关系代词有：that,which,who,whom,whose,在定语从句中作主语、宾语中表语，whose
(whom,who,that指代人，在定语从句中作宾语，可省略)
(which或that代物，在定从中作主语)
关系副词有：when(指时间)，where(指地点),why(指原因)，在定语从句中作状语。
例如：Would you suggest a time(when) we can have a talk?(when可省略)
The house where they live is not very large./This is the reason why he did not came to the meeting.
注意：不是表时间的先行词都用when引导定从，不是表地点的先行词都用where引导定从。例如：We´ll visit the factory which(＝that) makes radios.
(which或that在定从中作主语，where不可用主语，故不可用)
They still remember the happy days(which/that) they spent in Beidaihe.
(which或that在定从中作spent的宾语，when不可作宾语，故不可用)
注意：
①先行词是表示地点的名词时（country,school,room…），而关系词代替先行词在定语从句中充当地点状语，一般用where引导定语从句。也可以用介词＋which的结构。值得注意的是which前介词的选择是根据先行词与介词的搭配关系而定。The room where(=in which)he used to live has now been turned into a museum.
②先行词是表示时间的名词（year,month,day,night…），而关系词代替先行词在定语从句中充当时间状语，一般用when引导定语从句。也可以用介词＋which的结构。值得注意的是which前介词的选择是根据先行词与介词的搭配关系而定。应特别注意：介词的位置变化以及相应的关系词的变化。请看下面两个句子。
那就是他工作的大学。
┏ at which he works.
┣ which he works at.That is the college ┣ where he works.
┣ that he works at.
┗ he works at.
它出生的那一天是1952年8月20日。
┏ on which he was born
┣ which he was born onThe day ┣ when he was born wasAug.20,1952.
┣ that he was born on
┗ he was born on
二、限制性定语从句与非限制性定语从句
限制性定语从句和主句之间不用逗号分开，修饰主句中的某一个名词或名词词组或代
词；非限制性定语从句常用逗号和主句隔开，可以修饰主句中的某一个词，也可修饰整个句子。非限制性定语从句不能用that引导，引导非限制性定语从句的关系词不能省略。非限制性定语从句例：
Li Ping’s father, who works in a factory, is an engineer./He tore up my photo, which made me very angry.(which指代主句内容，因前后两句是因果关系，此时which不可换为as。)
He is good at physics, as is known to us all.＝As is known to us all, he is good at physics.(as指代主句内容，在as is known/believed, as we all know/believe这类结构中as不可换为which)
只用that引导和不用that引导的场合
只用that引导和不用that引导的场合
当先行词既包括人又包括物时：He talked about the men and the books that attracted him.
指物的先行词被any, every, only, very, all, no等修饰时：These are the very points that interest me./That"s the only watch that I like most.
指物的先行词被序数词或形容词最高级修饰时：The first step that we are to take is very difficult./This is the second card that he gave me.
先行词是指物的不定代词all,little,few,much,及everything,anything,nothing等时：There is still much that can be done about it./Have you got everything that you need?
先行词是who时：Who that have seen him does not like him?
不用that的场合如下：
1）非限制性定语从句中
March .
2）介词放在关系代词之前时
3）句中出现了that，或先行词是that时
四、“介词＋关系代词”用法
介词的确定应依据定语从句中短语的习惯性搭配，例如：Who is the girl with whom you just shook hands?(shake hands with…是习惯性搭配)
介词常受先行词的制约（即介词和先行词的搭配），例如：He built a telescope through which he could study the skies.(through which 即through the telescope)
当关系代词作“动词＋介词”固定短语的宾语时，此时因定短语中的介词不能拆开移到关系代词前。例如：This is the watch which you´re looking for./He is a kind of man whom you can safely depend on.
五、几个名词后的引导词
situation后常用where,in which引导定语从句
Can you imagine a situation where/in which you can use the word?
2.way后面的定语从句，引导定语从句有三种情况：
a.在比较正式的文体中用in which
I was struck by the beauty of the way in which she stood.
b.一般情况下用that
Lincoln asked the people to think of slavery in the way that these men did.
c.in which和that省去。
That"s the way I looked at it.
The assistant who served her did not like the way she was dressed.
六、关于as引导的定语从句的问题
as引导定语从句主要用于非限制性定语从句和the same…as，such…as，as…as的结构中。1.as与which都可以引导一个非限制性定语从句，并代表前面整个句子或主句中的表语。He married the girl，as(which)was natural.He seemed a freigner,as(which)in fact he was.
不同的是：as引导的定语从句可以前置，而which不行。
在the same…as,such…as,as…as结构中，same,such,as之后应是名词或形容词＋名词。We are facing the same problems as we did years ago.Some people have no doubt that their cat understands as many words as a dog does.We hope to get such a tool as he is using.
这三种结构也可以用which改写。但要去掉这种结构，不能直接用which代替as。
以上三句分别可以改写成：We are facing the problems which we faced years ago.Some people have no doubt that their cat understands the words which a dog understands.We hope to get the tool which he is using.the same…as与the same…that引导的定语从句在意义上的区别是：前者修饰的是与原物同样的；而后者修饰的就是先行词同样的东西。比较：This is the same watch as I lost.这和我丢失的那一只表一样。（不是同一只）This is the same watch that I lost.这就是我丢失的那一只表。（同一只）
定语从句与其他从句或句型的区分
一、定语从句与并列句
用一个恰当的词完成下列句子，使之完整与正确。
①Mr Li has three daughters，none of _____ is an engineer．
②Mr Li has three daughters，but none of _____ is a dancer．
③Mr Li has three daughters；_____ are doctors．
解析：定语从句与并列句的主要区别在于：并列句有像and，but，so等并列连词或两个句子用分号连接，这时就不能再用引导定语从句的关系词了。从结构上看，①小题是定语从句，故填whom；②小题有并列连词but，是并列句，故填代词 them；③小题是两个并列分句，无需连接词，缺少主语，故填none或they。
二、定语从句与状语从句
三、定语从句与同位语从句
定语从句和同位语从句在形式结构上基本相同，都跟在名词或代词之后，且又常由that引导。但它们的句法功能却不相同。我们可以从以下几个方面把它们区别开来：
1.先行词的范围不同
定语从句的先行词范围很广，可以指人、物等，没有限制；同位语从句的被修饰词通常是少数一些表示抽象意义的名词，不指人。同位语从句修饰的词常见的有：belief, doubt, fact, hope, idea, news, thought, order, suggestion, wish, answer, information, conclusion, decision, knowledge, opinion, problem, promise, question, plan, report, truth, view等。例如：
This is the place that / which we visited yesterday . 这就是昨天我们参观过的地方。（定语从句）
We don’t know the reason why they didn’t attend the meeting. 我们不知道他们（为什么）没有参加会议的原因。（定语从句）
The text tells us a fact that smoking does great harm to people’s health .
这篇课文又告诉我们一个事实，吸烟对健康危害很大。(同位语从句)
I had no idea when the sports meet will take place. 我不知道运动会何时举行。(同位语从句)
2.从句和先行词的关系不同
定语从句在复合句中相当于形容词，对先行词起修饰、描述或限制的作用，与先行词之间有从属关系。同位语的作用相当于名词，对前面的名词给予补充说明或进一步解释，是前面名词的具体内容,与先行词之间是同位关系。例如：
The news that she had passed the exam made her parents very happy.
她考试及格的消息使她父母很高兴。（同位语从句）
此句中的同位语从句 The news that she had passed the exam
可以改写成表语从句：The news is that he passed the exam.
The news that he told us interested all of us. 他告诉我们的消息使大家都感兴趣。（定语从句）
The news that he told us 是定语从句，此句就不能改写为：The news is that he told
3.引导词及其作用不同
引导定语从句的词是关系词，常见的关系词有that , which , who , whose , whom , when , where , why , as 等。关系词除了连接主从句的作用外，还在定语从句中充当一定的句子成分，如主语、宾语、状语、定语、表语等。引导同位语从句的that只起连接主从句的作用，不在从句中担任任何成分。what, whether 和 how 可以引导同位语从句，但不能引导定语从句。例如：
I’ll never forget the day when I saw the Great Wall．
我永远不会忘记我见到长城的那一天。（定语从句，关系副词when作从句状语）
The fact that（which） we talked about is very important．
我们所谈论的那个事实很重要。（定语从句，that在从句中作about的宾语）
The fact that he succeeded in the experiment pleased everybody．
他实验成功这个事实使我们大家很高兴。（同位语从句，that只起连接作用）
I have no idea what he has done. 我不知道他做了什么。（同位语从句）
I have a doubt whether he will be warmly welcomed . 我怀疑他是否能受到热烈欢迎。(同位语从句)
You have no idea how worried he was . 你不知道他是多么担心！(同位语从句)
三、定语从句与强调句
用一个恰当的词完成下列句子，使之完整与正确。
①It is on the morning of May 1st _____ I met Liang Wei at the airport．
②It is the factory _____ Mr Wang works．
解析：定语从句与强调句的主要区别在于：强调句的结构为“It is/was＋被强调部分＋that＋从句”。被强调部分可以是除谓语以外的任何成分，当被强调部分是人时，还可用who代替that。这一句型中，一定不能因为被强调部分是表时间或地点的词就用when或where代替 that。从结构上看，①小题是强调句，故填 that。此种情况检测的标准是：先把强调句中的It is/was去掉，再把被强调部分还原，在不增加或减少任何单词的情况下，如句子仍然成立则为强调句，否则为定语从句。将第①小题改为：I met Liang Wei on the morning of May 1st at the airport．显然，这句话是正确的，故为强调句。②小题则是定语从句，用上述方法转换便知the factory前差个介词in，故填 where。
四、定语从句与习惯句型
用一个恰当的词完成下列句子，使之完整与正确。
①It is the first time _____ she has been in Shanghai．
②It was the time _____ Chinese people had a hard life．
解析：这里①小题是一个习惯句型，其结构为：It is/was the first/second ．．． time ＋that从句。故①填that，其意为：这是她第一次在上海。②小题the time是先行词，其后是表示时间的定语从句，故填 when。
五、定语从句与单句
用一个恰当的词完成下列句子，使之完整与正确。
①The mother told the lazy boy to work，_____ didn"t help．
②The mother told the lazy boy to work．_____ didn"t help．
解析：含有定语从句的复合句与两个单句的主要区别在于：前者有主句，有从句，必须有关系词；而后者则是两个单独的句子，不需要任何关联词。①小题两个句子用逗号连接且没有并列连词，显然应是主从句关系，因此需用关系词 which，前面整个句子作先行词；②小题则填It，代替前面的整个句子。解题时，注意标点符号的运用。
定语从句与易混句型练与析
定语从句是历年高考试题中的考查热点之一，虽然其难度并不大，但许多考生对这一语法内容掌握得并不好，失分较多。做这一类题的关键是要能正确地分析出其结构来，即首先认出它是否为定语从句，然后再确定使用哪个连接词。定语从句易与其他句型混淆，需要仔细区分。现在我们来看看下列句型结构，请大家选择恰当的词填空（有的小题正确答案不只一个）。
Ⅰ．A．whom B．them
1．Mr Smith has three sons，none of ＿＿＿＿ is a computer expert．
2．He has three sisters，＿＿＿＿＿ are doctors．
3．She has three CDs，but none of＿＿＿＿＿ is interesting．
4．I have many friends，and all of＿＿＿＿＿ are nice and friendly．
5．Miss Yang has some relatives here；＿＿＿＿ like her very much．
Ⅱ．A．where
1．Rice grows well ＿＿＿ there is enough water．
2．I know the university ＿＿＿＿ my parents worked ten years ago．
3．After th ewar，a new school building was put up ＿＿＿ there had once been a theatre．
4．The hospital ＿＿＿＿ Mr Li was operated on in has taken on a new look．
Ⅲ．A．that
1．It is on a summer afternoon ＿＿＿＿ he met Liang Wei from Shanghai．
2．Is it on the farm ＿＿＿＿ Mr Wang lives？
3．It is the farm ＿＿＿＿ Mr Wang lives．
4．Is it Lang Weiwei ＿＿＿＿ is speaking to a foreigner？
Ⅳ．A．that
1．Nobody in our school has the same camera ＿＿＿＿ you have．
2．She is such a good girl ＿＿＿＿does well in French．
3．She is such a good girl ＿＿＿＿ all of us like to make friends with her．
Ⅴ．A．that
1．The news ＿＿＿＿ he told me sounds reasonable．
2．The news ＿＿＿＿ China has joined the WTO excites all the Chinese．
Ⅵ．A．that
1．It is the first time ＿＿＿＿ I have been here．
2．It was the time ＿＿＿＿ we had a hard life．
［答案与简析］
Ⅰ．本组题考查定语从句与并列句的区别。第1和2小题是定语从句，正确答案分别是A和D；第3和4小题有并列连词but和and，为并列句，每句只能有一个连接词，故正确答案均为B；第5小题中的前后两部分用分号连接，是两个并列分句，无需连接词，故C项正确。
Ⅱ．本组题考查定语从句与地点状语从句的区别。第1和3小题均无先行词，是表示地点的状语从句，只能用where引导，故答案均为A；第2小题是定语从句，A和C两项均正确；第4小题是定语从句，由于有介词in，故B、D两项均正确。
Ⅲ．本组题考查定语从句与强调句的区别。强调句的结构为：It is/was＋被强调部分＋that＋从句。被强调部分可以是除谓语以外的任何部分，而且强调人时，还可用who代替that。注意这一句型中不能因为被强调部分是时间或地点，就想当然地用when或where代替that。第1和2小题是强调句，故A项正确。可用此技巧解题：先把强调句中的It is/was．．．that去掉，再把被强调部分调到句末，在不增加或减少任何单词的情况下，如句子成立则为强调句，否则为定语从句。可将第1和2小题分别改为：He met Liang Wei from Shanghai on a summer afternoon．Mr Wang lives on the farm．显然，两句均正确，故为强调句。第3小题是定语从句，用上述技巧可知缺介词on，故C项正确；第4小题也是强调句，强调人，故A、D两项均正确。
Ⅳ．本组题考查结果状语从句与定语从句的区别。第1小题是as引导的定语从句，即the same．．．as结构，as在从句中作宾语，第2小题也是as引导的定语从句，即such．．．as结构，as在从句中作主语，故答案均为B。第3小题是such．．．that结果状语从句，关键区别在于that在状语从句中不作任何成分，故正确答案为A。
Ⅴ．本组题考查同位语从句与定语从句的区别。that引导同位语从句时在从句中不作任何成分，只是用来解释或说明先行词的内容，而定语从句中的that在从句中作主语或宾语。第1小题是定语从句，因为tell缺直接宾语，故A和B项均正确；第2小题从句中不缺主、宾语，是同位语从句，故A项正确。
Ⅵ．本组题考查固定结构与定语从句的区别。第1小题是“It（This）is/was．．．time that＋从句”结构，意为“这是某人第几次干某事”，故A项正确；第2小题为时间作先行词的定语从句，故B项正确。
