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介词+关系代词引导的定语从句（一）“介词+关系代词”引导的定语从句是定语从句的一种复杂形式，这类定语从句的关系代词主要有which ,whom , whose , 它们既可以引导限定性定语从句，也可以引导非限定性定语从句。
关系代词前该选用什么样的介词，要根据不同的语境、习语、惯用法等来决定。
一．介词选择的主要标准1.介词与定语从句的先行词是一种习惯性搭配Human facial expressions differ from those animals in the degree towhich they can be controlled on purpose.人类的面部表情和动物的面部表情就可控制的程度来说是不一样的。
( to a degree ) The gentleman about whom you told me yesterday proved to be athief.你昨天告诉我的那个绅士被证明是个小偷。
( tell sb. about sb./sth. )The English play in which my students acted at the New Year's party was a great success.那场在新年晚会上我学生参加表演的英语剧很成功。
( in the play )The schools themselves admit that not all children will be successful in the jobs for which they are being trained.学校本身承认，并不是所有的孩子都能在他们所接受的培训的职业成功。
( be trainedfor the job )2.介词与定语从句中的动词是一种习惯性搭配Who is the man with whom our teacher is shaking hands? 我们的老师与之握手的那个男士是谁？ ( shake hands with sb. ) Last month , part of Southeast Asia was struck by floods , from上个月，东南亚的部分 effects the people are still suffering. whose地区发生洪水，人们还在遭受着洪水所带来的影响。
介词+关系代词”引导的定语从句介词加关系代词引导的定语从句要注意以下几点：1．“介词+ 关系代词”引导的定语从句时，介词的宾语只能用which（指物）和whom （指人），即：介词+which/whom。
不能用that 和who。
.This is the teacher from whom we’ve learned a lot. 这就是从他那里我们学了很多东西的老师。
Great changes have taken place in the city in which we live. 我们所居住的城市发生了巨大的变化。
2．有时介词也可放在从句的末尾，这时关系代词可用which/that(指物)，who/whom/that（指人），也可以省略。
. The situation (which/that ) we had got into was very dangerous. 我们当时的处境很危险。
The man (whom/who/that) you were talking to just now is my English teacher. 你刚刚和他谈话的那个人是我的英语老师。
3．当定语从句中的谓语动词短语是固定搭配，不可分割时，那么动词短语中的介词不能前置。
.This is the pen which I’m looking for. 这是我正在找的那支钢笔。
不能写成：This is the pen for which I’m looking.4．定语从句也可由“名词/代词/数词+介词+which/whom”引出。
. That old man has two sons, one of whom is a doctor. 那个老人有两个儿子，其中一个是医生。
The house, the windows of which ( = whose windows = of which the windows) were damaged, has now been repaired. 窗子遭破坏的那栋房子现在已经修好了。
高考英语一轮总复习考点突破：考点三“介词＋关系代词”引导定语从句一、“介词＋关系代词”引导定语从句的用法“介词＋关系代词”既能引导限制性定语从句，又能引导非限制性定语从句。
先行词指物时，关系代词用which；先行词指人时，关系代词用whom；关系代词whose与所修饰的名词也可同时放在介词之后。
The USA is a large country in which many different dialects are spoken.美国是一个大国，有着许许多多不同的方言。
He is the person on whom you can depend.他是一个你可以信赖的人。
He was the man from whose room the thief had stolen his bag.他就是被小偷从房间里偷走包的那个人。
二、“介词＋关系代词”结构中介词的确定1．根据定语从句中动词、形容词所需要的某种习惯搭配来确定。
In the dark street, there wasn't a single person to whom she could turn for help.在黑暗的街道上，没有一个她可以求助的人。
(turn to sb for help)Physics is the subject in which every student in our school is interested.物理是我们学校每个学生都很感兴趣的课程。
(be interested in)2．根据与先行词搭配的具体含义而定。
I'll never forget the time during which I spent my childhood in the country.我永远不会忘记我童年时在乡下度过的那段时光。
(during the time)3．根据所表达的意思来确定。
The colorless gas, without which we can't live, is called oxygen.这种无色的气体就是氧气，没有它我们无法生存。
“介词 + 关系代词”引导的定语从句“介词+关系代词”型定语从句五大考点“介词+关系代词”引导的定语从句是英语语法中的难点和重点, 近年来高考对这一语法结构的考查大有升温之势。
在介词后作宾语的关系代词只有which 和whom。
如先行词是物，引导词用which；如先行词是人，则引导词用whom。
如：This is the ship by which I went to Shanghai.This is the student for whom I bought the book.考点1 简单介词+关系代词知识归纳：用于此结构的关系代词指人时只能用whom, 指物时只能用which；介词选择的依据主要是根据从句中的动词、形容词、名词与介词的固定搭配而定；或者以先行词与从句中的动词关系及所表达的含义而定；或者以先行词在定语从句中的作用和含义而定，并且含有介词的短语动词不能拆开，介词仍然放在动词之后。
（1）根据定语从句中的谓语动词确定介词，其动词或介词搭配，构成动词短语。
例如：Is this the car for which you paid a high price? (pay for)In the dark street, there wasn’t a single person to whom she could turn for help. (turn to sb for help)The man with whom you shook hands just now is our English teacher. (shake hands with sb) （2）根据定语从句中的形容词确定介词，其形容词与介词搭配，构成形容词短语。
例如：The two things about which Karl Marx was not sure were the grammar and some of the idioms. (be sure about)The teacher of whom the students in our class are fond is Mr Wang, our English teacher. (be fond of)（3）根据定语从句所修饰的先行词确定介词，其先行词往往是表示时间、地点、原因、方法、工具等的词，它们与介词之间有一定的联系。
介词加关系代词的定语从句
以下是10条介词加关系代词的定语从句：
1.This is the book that I was looking for. 这就是我在找的那本书。
2.The city where I was born has changed a lot. 我出生的那个城市已经变化很大
了。
3.The person to whom you should speak is the manager. 你应该找的人是经理。
4.This is the house in which I grew up. 这就是我长大的那个房子。
5.The reason why she left is still unclear. 她离开的原因仍然不清楚。
6.The man with whom she was talking is my boss. 她正在和那个人谈话，他是我
的老板。
7.The movie for which I bought tickets was canceled. 我买的电影票所对应的电
影被取消了。
8.The restaurant at which we ate was very good. 我们吃饭的那家餐厅很不错。
9.The company for which she works is very successful. 她所在的公司非常成功。
10.The park through which we walked was very beautiful. 我们走过的那个公园非
常美丽。
