介词加关系代词引导的定语从句(1) 2
介词+关系代词(定语从句)
1. Poce misses the old wheel chair . 2. His mother used to sit on the wheel chair. Poce misses the old wheel chairon whichhis mother used to sit.
1. The reason is that she has lovely faces. 2. Poce had a crash on this girl for the reason. The reasonfor whichPoce had a crash on this girl is that she has lovely faces.
• We like Rose and Jack very much , _____ from _____ whom we can learn a lot about true love.
• The reason ____ for ____ which he made the final decision to retire is that Liu Xiang suffered a lot from his injured ankle.
of which • I have never seen such interesting fingers,____ _____ the fourth is the most lovely.
Assignment: preposition + pronoun
on which 1. Do you like the book she spent $10? for which 2. Do you like the book she paid $10? from which she learned a lot? 3. Do you like the book 4. Do you like the book about which she often talks? 5. He built a telescope through which he could study the sky. 6. There is a tall tree outside, under whichour teacher is standing. to whom I spoke on the phone last night 7. The man __________ is very good at wrestling. which 8. The towerfrom ________ people can have a good view is on the hill. of which is 9. China has a lot of rivers, the second longest ____________ the Yellow River. 10. He paid the boy $10 for washing ten windows, of which hadn’t been cleaned for at least a year. most ___________
“介词+关系代词”引导的定语从句_
“介词+关系代词”引导的定语从句_介词+关系代词引导的定语从句介词+关系代词引导定语从句时，关系代词常用 which （指物） whom(指人），即介词+which/whom。
1.当介词放在关系代词的前面时，关系代词which或whom不能省略。
He paid the boy $ 10 for washing ten windows, most of which had t been cleaned for at least a year.他付给那个男孩10美元擦洗10扇窗户，这10扇窗户中大部分至少一年没擦了。
In the dark street, there wasn t a single person to whom she couid turn.在黑暗的街道上,她没有一个可以求助的人。
定语从句中，当介词位于定语从句的末 which (指物），that/whom/who (指人）作介词的宾语，而且作介词宾语的关系代词可以省略。
This is the hero that/who/whom/(可省略) we are proud of.这是我们引以为荣的那个英雄。
This is the pen that/which/(可省略) I I wrote the letter with.这是我写信时用的那支钢笔。
【温馨提示】①有些动词+介词的固定词组不可把介词置于关系代词前。
这就是我正在找的磁带。
[误]This is the right tape for which I m looking, [正]This is the right tape that I m looking for.②常见的不可拆开的动词词组有：care for 喜欢,关心deal with 处理，对付get through 通过;到达;接通电话hear from/of 收到某人的来信/听说look for/after寻找/照顾send for派人去请see to照管，料理3.复合介词短语+关系代词which 引导的定语从句，这种结构引导的定语从句常与先行词用逗号分开，定语从句常用倒装语序。
介词+关系词引导的定语从句
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。
高中英语语法：介词加关系代词引导的定语从句
高中英语语法“介词+ which / whom”引导的定语从句“介词+关系代词”引导的定语从句，是定语从句一种介词前置的定语从句句型，介词与关系代词之间存在一种介宾关系。
当关系代词在定语从句中作介词宾语时，把介词置于关系代词前，即演变出“介词+关系代词”句型。
例如：The man who/whom /that you spoke to is a teacher.=The man to whom you spoke is a teacher.一、基本构成1.“介词+关系代词”结构引导的定语从句中，关系代词只能用which（指物）或whom(指人) ，即：介词+which/whom。
（1）The man to whom you spoke is a teacher.（2）The city in which she lives is far away.（3）The little girl is reading a book,in which there are many cartoons.注意：当介词放在关系代词的前面时，用在介词后的关系代词不能省略。
2.在限制性定语从句中，当介词置于定语从句的谓语动词之后时，可用that/which(指物)；that/who/whom（指人）作介词的宾语.且此处关系代词可以省略，特别是在口语中。
如：（1) The man (who/whom /that )you spoke to is a teacher.（2）The city（which/that）she lives in is far away.注：通常介词放在定语从句中动词后，也可以放在关系代词前面，但有些特殊动词短语搭配不能拆分，介词只能放在动词后，如：look for, look after, pay attention to ,take care of , look forward to, listen to等。
介词+关系代词引导的定语从句例句
介词+关系代词引导的定语从句例句
1. 我刚才和你说的那个人，是我公司的新销售经理。
2. 这是我刚刚买的那本书，书里的故事非常有意思。
3. 我昨天接到一个关于工作的电话，电话的内容让我感到惊讶。
4. 昨天你对我提到的那个地方，我已经去过了。
5. 这是我给你准备的那份礼物，希望你会喜欢。
6. 今天我看到了你问到的那个问题的答案，你可以去看一下。
7. 有些人总是对那些他们见过的人保持怀疑的态度。
8. 这是我们一起去过的那个城市，我很喜欢那里的风景。
9. 我想起了你给我介绍的那个朋友，他真的很有趣。
10. 他一直在追求那个对他有好感的女孩。
介词加关系代词例句
介词加关系代词例句在介词加关系代词的语法规则中，常见的有以下几种情况。
1. 在定语从句中，介词加关系代词可以表示时间、地点、原因或目的等。
例如：I still remember the day on which we met for the first time.（我仍然记得我们第一次见面的那一天。
）The house in which he lives is very big.（他住的房子很大。
）That is the reason why he refused to help us.（那就是他拒绝帮助我们的原因。
）We need to find a way by which we can solve this problem.（我们需要找到一种方法来解决这个问题。
）2. 在介词宾语从句中，介词加关系代词可以表示原因、结果或条件等。
例如：He is confident of the fact that he will pass the exam.（他相信他会通过考试这个事实。
）I am worried about the possibility that he might not come.（我担心他可能不会来的可能性。
）She is happy with the news that she got the promotion.（她对她得到晋升的消息感到高兴。
）3. 在介词短语中，介词加关系代词可表示修饰名词的关系，常用于介词+which结构。
例如：I'm interested in the book with which you're studying.（我对你正在学习的那本书很感兴趣。
）The game about which they are talking is very exciting.（他们正在谈论的游戏非常令人兴奋。
）4. 在介词对等结构中，介词加关系代词可以构成介词对等从句。
介词加关系代词引导的定语从句
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 to which 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 a thief.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 trained for 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 whose effects the people are still suffering. 上个月，东南亚的部分地区发生洪水，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
定语从句之—介词+关系代词词The Attributive Clause关系代词的用法；在复合句中修饰一个名词或代词的从句称为定语从句，一般紧跟在它所修饰的名词或代词后面。
定语从句所修饰的名词或代词称为先行词。
引导定语从句的关联词称为关系词，关系词有关系代词和关系副词。
关系代词有that ，which ，who ，whom ，whose 。
考查重点定语从句定语从句是中考必考考点之一，主要考查的是时态及宾语从句的语序，有时也会考查定语从句的引导词。
考查的主要形式是单项填空、完形填空、短文填空和完成句子。
阅读理解和书面表达肯定也会考查到定语从句。
因此学生要熟练掌握定语从句的用法。
关系代词引导的定语从句最为常见和常考。
命题趋势引导定语从句的关系词有关系代词和关系副词，关系代词和关系副词放在先行词及定语从句之间起连接作用，同时又作定语从句的重要成分。
常见的关系代词包括that， which， who（宾格whom，所有格whose）等关系副词包括where， when， why等根据定语从句与先行词的关系，定语从句可分为限制性定语从句及非限制性定语从句。
限制性定语从句：紧跟先行词，主句与从句不用逗号分开，从句不可省去。
非限制性定语从句：主句与从句之间有逗号分开，起补充说明作用，如省去，意思仍完整。
关系代词：who、that、whom、whose、which 做作主主语做宾语语1）指人：who/that 指物：which/that 2）指人：who/whom/that/省略指物：which/that/省略► The man who/tha t spoke at the ► The building which/that is ► I visited a scientist whose name is known all over themeeting is from Hong Kong.会上发言的人来自香港。
定语从句中介词+关系词的用法
介词＋关系代词”引导定语从句是我们学习定语从句的重点，也是高考的常考点。
学习这种从句应注意以下几点：1. 用于这种情况的关系代词一般为which（指物）和whom（指人）。
在这种结构中，介词的选择非常关键，可以遵循以下四个原则：（1）根据定语从句中的谓语动词确定介词，其动词与介词搭配，构成动词短语。
例如：Is this the car for which you paid a high price? （pay for）这是你花大价钱买的车吗？I n the dark street, there wasn’t a single person to whom she could turn for help. （turn to sb. for help）在黑暗的街上，她找不到一个人来帮助她。
The man with whom you shook hands just now is our English teacher. （shake hands with sb. ）刚才你和他握手的那个人是我们的英语老师。
（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）马克思没有把握的两件事是：语法和习惯用法。
The teacher with whom the students in our class are popular is Mr Wang, our English teacher. （be popular with）在我们班，深受学生欢迎的是王老师－－我们的英语老师。
（3）根据定语从句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。
介词加关系代词引导的定语从句
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 to which 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 a thief.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 trained for 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 whose effects the people are still suffering. 上个月，东南亚的部分地区发生洪水，人们还在遭受着洪水所带来的影响。
介词加关系代词定语从句
1.“哇塞，‘The book on which I spent a lot of time is really interesting.’就像找到了一个宝藏。
比如说我读那本书的时候，可不就像在挖掘宝藏嘛。
”（例子：读那书如挖宝藏，如超棒“这句超棒” 棒。
）2.“嘿，‘The person with whom I had a great conversation is so smart.’有次和那个人聊天，那感觉就像和智者对话。
这也太厉害了吧。
”（例子：和那人聊如和智者对话，如厉害“这句好厉害” 厉。
）3.“哎呀，‘The place in which I had a wonderful time is like a paradise.’咱就像进入了一个梦幻之地。
比如我在那个地方玩的时候，多让人开心。
”（例子：在那玩如进梦幻地，如开心“这句好开心” 心。
）4.“哇哦，‘The movie about which we talked a lot is really moving.’这不是很让人感动嘛！有次我们讨论那部电影，就像在分享一个感人的故事。
”（例子：论电影如分享感人故事，如感动“这句好感动” 动。
）5.“嘿，‘The song to which I always listen is like a magic spell.’有那么一种神奇的感觉。
就像被施了魔法。
比如我听那首歌的时候，那叫一个陶醉。
”（例子：听那歌如被施魔法，如陶醉“这句好陶醉” 醉。
）6.“哎呀，‘The game in which I participated is so exciting.’咱就像参加了一场冒险。
比如我玩那个游戏的时候，多让人兴奋。
”（例子：玩游戏如参加冒险，如兴奋“这句好兴奋” 奋。
）7.“哇，‘The person for whom I did a favor is very grateful.’有次我帮那个人，就像做了一件好事。
介词加关系代词定语从句
“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。
英语学习：由“介词+关系代词”引导的定语从句
英语学习：由“介词+关系代词”引导的定语从句1. 由“介词+关系代词”引导的定语从句主要用于正式文体，在非正式文体中通常将介词放至句末。
如：This is the man to whom I referred. 我指的就是这个人。
This is the man (whom) I referred to. 我指的就是这个人。
2. 直接用于介词后作宾语的关系代词which不能换成that，直接用于介词后作宾语的关系代词whom不能换成who。
但若介词用于句末，则用作宾语的which, whom也可换成that, who，或者省略不同。
如：这是一个我们讨论了很多的问题。
This is a subject about which we have talked a lot.(which不能换成that，也不能省略)This is a subject which we have talked about a lot. 这是一个我们讨论了很多的问题。
(which能够换成that，也能够省略)3. 关系副词when, where, why根据情况有时可换成“介词+关系代词which”。
如： That is the day when [=on which] he was born. 那就是他出生的日子。
That is the house where [=in which] he lived. 那就是他住过的房子。
That is the reason why [=for which] he must apologize. 那就是他必须道歉的原因。
4. 在很正式的文体中，“介词+关系代词”引导的定语从句可紧缩成“介词+关系代词+不定式”结构。
如：在那儿孩子们有个玩耍的花园。
正：There the children had a garden in which to play. (很正式)正：There the children had a garden in which they could play. (较正式)正：There thechildren had a garden to play in. (较口语化)注：这类“介词+关系代词++不定式”结构中的介词不能没有，也不能放在句末。
介词加关系代词的定语从句
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。
“介词+关系代词”引导的定语从句
“介词+关系代词”引导的定语从句在定语从句的学习中，“介词+关系代词”引导的定语从句很常见，也很重要。
然而，如何正确运用介词，对于初学者来说是一个难点，现在我将其用法总结如下，希望对于大家掌握该知识点有所帮助。
一、介词的选用是根据定语从句中谓语动词的习惯搭配来确定。
This is the book on which I spent 8 Yuan.This is the book for which I paid 8Yuan.二、介词的选用是根据先行词的习惯搭配来确定。
2000 was the year in which my son was born.Oct 1st ,1949 was the date on which the PRC was founded.三、如果表示“所有格”或“整体与部分关系”时用介词of。
He traveled the world for two years, of which the sailing time was 2 months.This is the book of which the cover is blue.对比、观察和领悟1. This is the girl with whom I came to school.This is the girl to whom I often write.This is the girl from whom we got much help.This is the girl of whom I used to dream.This is the girl about whom they talked2. Yesterday I went to the bookstore for the book, for which I paid three dollarsYesterday I went to the bookstore for the book, on which the writer had signed his name.Yesterday I went to the bookstore for the book, to which I was asked to pay attention.Yesterday I went to the bookstore for the book, of which we are fond.Yesterday I went to the bookstore for the book, about which our teacher had talked实战演练1. He is the man _____ you can turn for help.2. Is this the book ______ you paid ten yuan?3.The farm_____ we worked ten years ago isn’t what is used to be.4. This is the factory _________ he worked ten years ago.5. It was in 1952 and Mandela was the black lawyer _____ I went for advice.6. He was generous with his time, _______ I was grateful.7. The parts of town ______ they had to live were decided by white people.8. We were put into a position ______we had either to accept we were less important, or fight the government.Keys: 1.to whom 2. for which 3.on which 4.at which5. to whom6.for which7.in which8.in which。
介词加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介词加关系代词引导的定语从句，是英语中一种用来修饰名词或代词的从句结构。
它由一个介词和一个关系代词组成，常常出现在句子中作为修饰成分，起到限定或说明的作用。
本文将从介词和关系代词的角度入手，详细讨论介词加关系代词引导的定语从句的构成、用法及注意事项。
一、构成介词加关系代词引导的定语从句由介词和关系代词两部分组成。
常用的介词包括of、in、on、from、to、with等，而关系代词则包括that、which、who、whom和whose等。
二、用法及例句解析1. 介词+which引导的定语从句介词+which引导的定语从句是最常见的一种结构，用于修饰物体。
其中最常用的介词是in、on、at、under、with等。
例句1：The book on which I was working last night is about history. （介词on+which修饰book）例句2：I saw a stray cat under the table, which looked hungry. （介词under+which修饰cat）2. 介词+whom引导的定语从句介词+whom引导的定语从句用于修饰人，常用介词有to、for、with、of等。
例句1：The person to whom I lent my umbrella hasn't returned it yet. （介词to+whom修饰person）例句2：He is a trustworthy friend, with whom I can share my secrets. （介词with+whom修饰friend）3. 介词+whose引导的定语从句介词+whose引导的定语从句用于表示所属关系，常用介词有of、in、on等。
例句1：The girl whose father is a doctor wants to be a nurse. （介词whose+father修饰girl）例句2：I admire the professor, in whose class I learned a lot. （介词in+whose修饰professor）三、注意事项1. 关系代词that与which的区别关系代词that与which都可以用于引导定语从句。
定语从句中介词加关系代词的用法
“介词+关系词”的用法1、关系代词在从句中作介词的宾语时，介词常可以提前，但介词提前时，关系代词只能用which 或whom。
如：The school (that/which) he once studied in is very famous.→The school in which he once studied is very famous.Tomorrow I will bring here a magazine (that/which) you asked for.→Tomorrow I will bring here a magazine for which you asked.We'll go to hear the famous singer (whom/that/who) we have often talked about.→We'll go to hear the famous singer about whom we have often talked.2、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。
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。
如：when=in/on/at…+which, where=in/on/at…+which, why=for+which如：I won’t forget the date when( on which) I was born.This is the room where (in which) I lived. = This is the room which I lived in.I don’t know the reason why (for which) he hasn’t come today.Tom still remembers the days when (in which) they lived in Tianjin.注意：1). 含有介词的动词短语一般不拆开使用，如：look for, look after, take care of等如：This is the watch which/that I am looking for. (√)This is the watch for which I am looking. (F)2). 若介词放在关系代词前，关系代词指人时用whom，不可用who或者that；指物时用which，不能用that；关系代词是所有格时用whose如：The man with whom you talked is my friend. (√)The man who/that you talked with is my friend. (F)The plane in which we flew to Canada is very comfortable. (√)The plane in that we flew in to Canada is very comfortable. (F)3).“介词+关系代词”前可有some, any, none, both, all, neither, most, each, few等代词或者数词如：He loved his parents deeply, both of whom are very kind to him.In the basket there are quite many apples, some of which have gone bad.There are forty students in our class in all, most of whom are from big cities.4). 把握“介词＋关系代词”结构中介词的选用介词的选择与主句中先行词的搭配密切相关。
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“介词+ which / whom”引导的定语从句
“介词+关系代词”引导的定语从句，是定语从句一种介词前置的定语从句句型，介词与关系代词之间存在一种介宾关系。
当关系代词在定语从句中作介词宾语时，把介词置于关系代词前，即演变出“介词+关系代词”句型。
例如：
The man who/whom /that you spoke to is a teacher.
=The man to whom you spoke is a teacher.
一、基本构成
1.“介词+关系代词”结构引导的定语从句中，关系代词只能用which（指物）或whom(指人) ，即：介词+which/whom。
（1）The man to whom you spoke is a teacher.
（2）The city in which she lives is far away.
（3）The little girl is reading a book,in which there are many cartoons.
注意：当介词放在关系代词的前面时，用在介词后的关系代词不能省略。
2.在限制性定语从句中，当介词置于定语从句的谓语动词之后时，可用that/which(指物)；that/who/whom（指人）作介词的宾语.且此处关系代词可以省略，特别是在口语中。
如：（1) The man (who/whom /that )you spoke to is a teacher.
（2）The city（which/that）she lives in is far away.
注：通常介词放在定语从句中动词后，也可以放在关系代词前面，但有些特殊动词短语搭配不能拆分，介词只能放在动词后，如： look for, look after, pay attention to ,take care of , look forward to, listen to等。
This is the pen that / which you are looking for.
The patient whom she is looking after is her father.
The words that /which we should pay attention to are written on the blackboard.
There are fifty patients who/whom/that we must take good care of.
练习：Are these sentences right?
(1) The man with whom you talked is my friend.
(2) The man(who/that) you talked with is my friend.
(3) The man with who/that you talked is my friend. (4) The plane in which we flew to Canada is very comfortable.
(5) The plane in that we flew to Canada is very comfortable.
二、关系副词when，where，why可用“介词＋which”来代替。
关系副词实际上是介词＋先行词。
其中
when=表时间的介词（如：in，at,during等）+which；
Where=表地点的介词（如：in，at,on,under等）+which；
Why=表原因的介词（如：for）+which
(1)当先行词表示时间，定语从句中缺少时间状语时，通常用关系副词when引导，此时也可选用表示时间的介词＋which来代替关系副词when。
I still remember the day when I came here. ( on the day =when)
(2)当先行词表示地点，定语从句中缺少地点状语时，通常用关系副词where引导，此时也可选用表示地点的介词＋which来代替关系副词where。
This is the house where I lived last year. ( in the house= where)
(3)当先行词为reason，定语从句中缺少表示原因状语时，通常用关系副词why引导，此时也可以用for which来代替关系副词why。
There are many reasons why people like traveling. (for the reasons =why)
三、关系代词前介词选择三原则：一先，二动，三意义（重中之重）
1.一先，即根据定语从句中介词与先行词的搭配关系选择。
I never forget the day on which I came to this school. (on the day)
2.二动，即根据定语从句中谓语动词与介词的搭配关系选择。
This is the iPad on which I spent 3000 yuan. (spend money on sth.)
3.三意义，即根据定语从句的意义来确定介词。
This is my pair of glasses, __without which__I cannot see clearly.
例题：用“介词+关系代词”的形式表示
1. Do you like the book __________ she learned a lot?
2. He paid the boy $10 for washing ten windows, most ______ hadn't been cleaned for at least
a year.
3. The tower _________ people can have a good view is on the hill.。