高考英语 考点一遍过 考点24 介词+关系代词引导的定语从句(含解析)
——————————教育资源共享步入知识海洋————————考点24 ＂介词＋关系代词＂引导的定语从句高考频度：★★★★★考向一＂介词+关系代词＂引导的定语从句●＂介词＋关系代词＂的用法当关系代词在定语从句中作介词宾语时，我们通常用＂介词＋关系代词＂引导定语从句。
如果指＂人＂，用＂介词＋whom＂；如果指＂物＂，用＂介词＋which＂。
●＂介词＋关系代词＂结构中介词的选用1.一般来说，确定关系代词前的介词，可以从以下三方面入手：①先行词的意义；②从句中的动词或形容词与先行词的固定搭配；③句子的意思。
☞I’ll never forget the time during which I spent my childhood in the country.我永远不会忘记孩童时代我在乡村度过的时光。
2.表示＂整体和部分关系＂，介词常用of。
在some，any，few，none，all，both，neither，most，each 等代词或数词的前、后可以用of which/whom。
☞John invited about 40 people to his wedding，most of whom are family members.约翰邀请了大约40人参加他的婚礼，他们当中绝大部分是家庭成员。
3.有时＂介词＋where＂可以引导定语从句，此时要和＂介词＋which＂引导的定语从句从意思上加以区别。
☞His head soon appeared out of the window，from where he saw nothing but trees.他的头很快从窗口探了出来，从那里除了树木他什么也看不到。
(from where相当于from out of the window，而不是from the window)●在定语从句中，含介词的短语动词不可拆开使用(短语拆开后含义发生变化)，如look after, look for 等。
●＂of which / whom＂有时可以用＂whose＋名词＂结构来改写。
●当先行词为way并且定语从句中缺少状语时，通常用in which或that引导定语从句(in which或that 可省略)；如果定语从句中不缺少状语，则用关系代词引导(that 或which 可省略)。
1.(2017·江苏卷·单项填空) In 1963 the UN set up the World Food Programme, one of ________ purposesis to relieve worldwide starvation.A. whichB. itsC. whoseD. whom【参考答案】C2.（2016 •江苏卷·单项填空）Many young people, most _________were well-educated, headed for remote regions to chase their dreams.A. of whichB. of themC. of whomD. of those【参考答案】C【答案解析】考查定语从句。
本题定语从句的先行词是Many young people，关系代词whom指代先行词，在定语从句中作介词of的宾语。
句意：很多年轻人都前往偏远地区追求它们的梦想，其中大部分人都受过良好教育。
故C项正确。
考向二定语从句与其他句型的区别一、限制性定语从句与同位语从句的区别关系副词引导限制性定语从句中的关系词有跟他们含义相应的先行词，而引导同位语从句时则没有与他们含义相应的先行词。
☞Sorry, I’ve forgot the day when we met for the first time.抱歉，我记不起我们第一次见面的日子了。
（定语从句，先行词the day 与when含义相应）☞I’ve no idea when we met for the first time.我不知道我们第一次是什么时候见面的。
（同位语从句，idea与when没有任何联系）二、定语从句与时间状语从句的区别当定语从句的引导词与时间状语从句的连接词都是when时，定语从句修饰、限制、说明时间名词，只能放在先行词的后面；而时间状语从句说明动作发生的情况，并且可以放在主句的前面。
☞Do you know the time when the class is over? 你知道下课的时间吗？（定语从句）☞It was already five o’clock when the class was over.=When the class was over, it was already five o’clock.当课结束时，已经是五点钟了。
（时间状语从句）三、定语从句与地点状语从句的区别当定语从句的引导词与地点状语从句的连接词都是where时，定语从句修饰、限制、说明地点名词；而状语从句则说明动作发生的地点，where没有对应的地点名词或代词。
☞This is the place where we used to live a few years ago.这就是几年前我们常居住的地方。
（定语从句）☞Let’s go where we can find a better job.我们到我们能找到更好工作的地方去吧。
（地点状语从句）四、定语从句与强调句型的区别定语从句对名词或代词的修饰和限制，关系词可能是that, which, as, who, but, 另一方面，句子中的It有所指；而强调句型是对某部分加强语气，强调语气的连接词只能是that, who，并且句子中的It 没有任何意义；一般比较明显，而有时就难以区别，还需要根据上下文的语境来判断。
It is a book that he wants.它究竟是强调句型还是定语从句，就要从语境上来考察。
如果它是用来回答What is this / that? 这样的问题，意思是：它是一本他想要的书。
句子显然是定语从句。
如果是用来回答What does he want? 这样的问题，那么意思是：他想要的是一本书。
显然，句子是强调句型。
五、定语从句与结果状语从句的区别定语从句中的关系词在从句中还要作某种成分，因而从句成分不完整；而结果状语从句中的连接词不作任何句子成分，因此句子成分完整。
☞It is such an interesting book as we all like.它是我们大家都喜欢的如此有趣的书。
（定语从句）☞It is such an interesting book that we all like it.它是一本如此有趣的书，我么大家都喜欢它。
（结果状语从句）比较：It is such an interesting book that we all like. 强调句型。
意思是：我们大家都喜欢的是一本如此有趣的书。
六、定语从句与独立主格结构的区别定语从句一般有关系词、主谓结构完整；而独立主格结构没有关系词、也没有谓语动词。
☞The book being very interesting, we all like it. 由于这本书有趣，我们大家都喜欢它。
☞The book which / that is very interesting was published last year. 这本有趣的书是去年出版的。
1. —He wrote a lot of novels, none of ____________ were popular.—It’s the same with his wife. She wrote some plays, but none of ___________ was a success.A. these；themB. which；whichC. those；whichD. which；them【参考答案】D2. After the war, a new school building was put up ____________ there had once been a theatre.A. thatB. whereC. whichD. when3. After living in Paris for fifty years he returned to the small town _____________ he grew upas a child.A. whichB. whereC. thatD. when【参考答案】2. B 3. B【答案解析】定语从句中有表示地点的先行词，而地点状语从句中则没有；定语从句的关系词根据需要可用＂介词+which＂来代替where，而地点状语从句则通常只能由where引导。
因此第2题中无表示地点的先行词，是表示地点的状语从句，故填where，第3题中the small town是先行词，为定语从句，故填where，也可用in which替换。
题组一基础过关用适当的关系词填空1.(2017·浙江) Italy, _________ has a much weaker tradition of immigration, has witnessed a sharp increase in immigration in recent years.2.(2017·北京) If we use, to achieve our purposes, a mechanical agency with _________ operation we cannot effectively interfere(干预), we had better be quite sure that the purpose put into the machine is the purpose which we really desire.3. (2017·北京)This is called “herd immunity”, ________ protects the people who get hurt easily, including those ________ can’t be vaccinated for medical reasons, babies too young to get vaccinated and people on ________ the vaccine doesn’t work.4.Her performances on the stage were perfect，________ made a lot of people admire her.5.The city was attacked by such terrible weather ________ few citizens had ever experienced before.6.A story I read two years ago，________ name I can’t remember cle arly，changed my idea about education.7.I don’t know the reason ________ you lied to your parents，but you’d better explain.8.________ is mentioned above，paper is first made in China.9.A sailor ________ has experienced no storm will never become an excellent sailor.10.I often think about the times ________ I have felt hurt and insulted by rude remarks from strangers and sometimes from acquaintances.题组二能力提升I.单项填空1.Human facial expressions differ from those of animals in the degree ________ they can be controlled on purpose.A.with whichB.to whichC.of whichD.for which2.Gun control is a subject_________ Americans have argued for a long time.A.of whichB.with whichC.about whichD.into which3.Eric received training in computer for one year, ___________ he found a job in a big company.A.after thatB.after whichC.after itD.after this4.True friendship is like health, the value___________is seldom known until it is lost.A.of itB.on whichC.of whomD.of which5.With more than 17 000 islands, _________ _only 6 000 are inhabited, Indonesia is the world’s largest archipelago (群岛).A.on whichB.for whichC.of whichD.along which6. Pointing to the house on ____________ roof grew lots of bushes, the old man told me that was____________ I would stay.A. its；whatB. whose；whatC. whose；whereD. its；where7. Our special thanks go to thousands of volunteers, without ____________ tireless work, noneof these would be possible.A. whichB. whomC. whoseD. that8. —Have you known Jane for long?—Not very long, ______________ we started to serve the World Expo in Milan.A. afterB. beforeC. whenD. sinceII. 语篇填空Do you know the man __1__wrote this book？He was Jason，one of the engineers __2__came from Russia in the 1950s.He worked in the same factory __3__my father once worked. When he came to China，the first thing __4__ he did was to visit the factory __5__did research on trolleybuses and found out the reason __6__China was so backward in it.Then he spent every minute __7__he could spare to help China develop transportation.__8__is mentioned above，Jason was a foreigner __9__made great contributions to our country and was a kind man to __10__we should say thanks.III. 语法填空When you decide you’re going to live alone，you get upset. This is __1__(nature). But there’s no need to get __2__(worry). Below are some ideas __3__ can help you out.Saving money is __4__ you need to start several months before you move out. You need to save enough money__5__(help) you survive for at least a month in the new place. The __6__(easy) of all ways is to spend less!Search for a place to live in before__7__(move) out. Make sure that the place you choose is in a good location. Besides，you can afford__8__.If you’re going to stay in an expensive city，find a roommate so that you can share the expenses.And if you have to live__9__your own for a long time，you’ll have to look for a part－time job. If you’re__10__student，you can work in restaurants，theaters，etc. And don’t spend a lot of money in a wasteful way! Try and save every penny of what you earn.题组三体验真题1.（2016 •浙江）Scientists have advanced many theories about why human beings cry tears, noneof ______ has been proved.A. whomB. whichC. whatD. that2.(2015·浙江) Creating an atmosphere employees feel part of a team is a big challenge.A. asB. whoseC. in whichD. at which3.(2015·重庆) He wrote many children’ s books, near ly half of_________ were published in the 1990s.A. whomB. whichC. themD. that题组一基础过关用适当的关系词填空1.which2.whose3.which, who, whom4.which5.as6.whose7.why8.As9.who 10.when题组二能力提升I.单项填空2.C 【解析】考查动词短语的辨析。
（完整版）介词加关系代词定语从句
（完整版）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、名词与介词的不变搭配而定；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 carfor whichyou paid a high price? (pay for)In the dark street, there wasn’t a single personto whomshe could turn for help. (turn to sb forhelp)The manwith whomyou 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 thingsabout whichKarl Marx was not sure were the grammar and some of the idioms.(be sure about)The teacherof whomthe students in our class are fond is Mr Wang, our English teacher. (be fondof)（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。
备战2019年高考英语 考点一遍过 考点24 介词+关系代词引导的定语从句(含解析)
考点24 ＂介词＋关系代词＂引导的定语从句高考频度：★★★★★考向一＂介词+关系代词＂引导的定语从句●＂介词＋关系代词＂的用法当关系代词在定语从句中作介词宾语时，我们通常用＂介词＋关系代词＂引导定语从句。
如果指＂人＂，用＂介词＋whom＂；如果指＂物＂，用＂介词＋which＂。
●＂介词＋关系代词＂结构中介词的选用1.一般来说，确定关系代词前的介词，可以从以下三方面入手：①先行词的意义；②从句中的动词或形容词与先行词的固定搭配；③句子的意思。
☞I’ll never forget th e time during which I spent my childhood in the country.我永远不会忘记孩童时代我在乡村度过的时光。
2.表示＂整体和部分关系＂，介词常用of。
在some，any，few，none，all，both，neither，most，each 等代词或数词的前、后可以用of which/whom。
☞John invited about 40 people to his wedding，most of whom are family members.约翰邀请了大约40人参加他的婚礼，他们当中绝大部分是家庭成员。
3.有时＂介词＋where＂可以引导定语从句，此时要和＂介词＋which＂引导的定语从句从意思上加以区别。
☞His head soon appeared out of the window，from where he saw nothing but trees.他的头很快从窗口探了出来，从那里除了树木他什么也看不到。
(from where相当于from out of the window，而不是from the window)●在定语从句中，含介词的短语动词不可拆开使用(短语拆开后含义发生变化)，如look after, look for 等。
●＂of which / whom＂有时可以用＂whose＋名词＂结构来改写。
高考英语语法全解-介词关系代词引导的定语从句（附精选例题习题和解析）
语法由介词+关系代词引导的定语从句1. 介词+关系代词中介词的位置关系代词whom，which，whose在从句中作介词宾语时，可以跟介词一起放在从句与主句之间（that，who不可以），也可以把介词放在从句中有关动词的后面，使关系代词紧跟它所修饰的先行词。
例如：He is a man of rich experience, from whom much can be learned.=He is a man of rich experience, whom much can be learned from.他是个经验丰富的人，从他那里能学到很多。
The school in which he once worked is a key school.=The school (which/that) he once worked in is a key school.他曾经工作过的学校是一所重点学校。
The manager in whose company I work pays much attention to improving our working conditions.=The manager whose company I'm working in pays much attention to improving our working conditions.我就职的那家公司的经理十分注意改善我们的工作条件。
2. 介词+关系代词的常见结构(1) 介词+which/whom例如：This is the famous singer about whom we have often talked.这就是那位我们经常谈论的著名歌唱家。
Fortunately we had a map, without which we would have got lost.很幸运，我们带了一张地图，如果没有的话，我们就会迷路了。
高考英语考点专题讲解：专题10 重点语法复习(定语从句)(解析版)
专题10 重点语法复习（复习定语从句）定语从句养成良好的答题习惯，是决定高考英语成败的决定性因素之一。
做题前，要认真阅读题目要求、题干和选项，并对答案内容作出合理预测;答题时，切忌跟着感觉走，最好按照题目序号来做，不会的或存在疑问的，要做好标记，要善于发现，找到题目的题眼所在，规范答题，书写工整;答题完毕时，要认真检查，查漏补缺，纠正错误。
总之，在最后的复习阶段，学生们不要加大练习量。
在这个时候，学生要尽快找到适合自己的答题方式，最重要的是以平常心去面对考试。
英语最后的复习要树立信心，考试的时候遇到难题要想“别人也难”，遇到容易的则要想“细心审题”。
越到最后，考生越要回归基础，单词最好再梳理一遍，这样有利于提高阅读理解的效率。
另附高考复习方法和考前30天冲刺复习方法。
一、关系代词引导的定语从句1. who, whom, whose引导的定语从句(1)who和whom指人, who在定语从句中作主语; whom在定语从句中作宾语, 在限制性定语从句中可省略。
在口语中可用who代替whom。
(2)whose指人或物, 在定语从句中作定语, 指物时可用of which代替, 指人时可用of whom代替。
Some people who are successful language learners often fail in other fields. 有些在语言学习上很有成就的人, 在其他领域常常一无所成。
Children who rarely exercise or whose diet is high in fat will gain weight quickly. 很少进行体育锻炼或饮食富含脂肪的孩子体重会增加很快。
2. that, which引导的定语从句(1)that多指物, 有时也指人, 在定语从句中作主语、表语或宾语, 作宾语或表语时可省略。
(2)which指物, 在定语从句中作主语或宾语, 作宾语时, 在限制性定语从句中可省略。
高中英语｜定语从句,全方位透彻解析(后附习题和答案)
高中英语｜定语从句，全方位透彻解析（后附习题和答案）01定语从句基本概念在复合句中，修饰名词或代词的从句叫定语从句。
引导定语从句的词叫关系词。
被修饰的名词或代词叫先行词。
定语从句一般放在先行词的后面。
02定语从句的关系词引导定语从句的关系词有关系代词和关系副词。
常见的关系代词包括that，which，who（宾格whom，所有格whose），as 等。
关系副词包括where，when，why等。
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。
03定语从句的分类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。
1. 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。
例如：Any man that / who has a sense of duty won’t do such a thing.任何有责任感的人都不会做这样的事。
2. 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。
例如：The house,which we bought last month,is very nice.这幢房子很漂亮,是我们上个月买的.注意：非限定性定语从句中不能使用关系代词that。
04关系代词的用法1. thatthat既可以用于指人，也可以用于指物。
在定语从句中作主语、宾语或表语，作宾语可省略。
例如：Mary likes music that is quiet and gentle.玛丽喜欢轻柔的音乐。
（that作主语）The coat （that）I put on the desk is blue.我放在桌子上的那件外套是蓝色的。
（that作宾语）2. whichwhich 用于指物，在句中作主语、宾语或表语，作宾语可省略。
例如：The building which stands near the train station is a supermarket.位于火车站附近的那座大楼是一家超市。
高考英语必考语法--定语从句详细讲解(附练习题及答案)
高考英语语法定语从句 attributive clause◆概念(1) 定语从句：在主从复合句中用作定语(修饰某一名词或代词)的从句叫定语从句，一般紧接在先行词(antecedent)后面。
(2) 先行词：被__________修饰的成份。
先行词可以为一个词，短语，或整个主句。
(3)引导定语从句的词叫关系词 关系代词____, ______, ______, ______, _____, _______关系副词 _____, ______, ______ 在从句中作某个句子成份（可以做主语，宾语，定语，状语）第一找出先行词；第二看先行词在定语从句中的语法功能（做主语、宾语、定语或状语）； 第三选择合适的关系词。
考点一：关系代词引导的定语从句1.who ,whom 和whose 引导的定语从句(1)who或whom均可指代人，但who在从句中作主语或宾语，做宾语时不可以出现在介词后；whom在从句中作宾语；两者在引导限制性定语从句时可用that 替换。
作主语时，who/that不可省略；作宾语时，whom/who/that可以省略。
◆ I’ve become good friends with several of the students in my school _________I met in the English speech contest last year.◆ I have many friends to _________ I’m going to send post cards.◆ The person I want to talk about with is Tu Youyou, the one ______ won theNobel Prize in Physiology or Medicine in 2015.(2)whose表所属关系，一般指人，也可指物，在从句中作定语。
备战最新2020年高考英语 考点一遍过 考点24 介词+关系代词引导的定语从句(含解析)
考点24 ＂介词＋关系代词＂引导的定语从句高考频度：★★★★★考向一＂介词+关系代词＂引导的定语从句●＂介词＋关系代词＂的用法当关系代词在定语从句中作介词宾语时，我们通常用＂介词＋关系代词＂引导定语从句。
如果指＂人＂，用＂介词＋whom＂；如果指＂物＂，用＂介词＋which＂。
●＂介词＋关系代词＂结构中介词的选用1.一般来说，确定关系代词前的介词，可以从以下三方面入手：①先行词的意义；②从句中的动词或形容词与先行词的固定搭配；③句子的意思。
☞I’ll never forget th e time during which I spent my childhood in the country.我永远不会忘记孩童时代我在乡村度过的时光。
2.表示＂整体和部分关系＂，介词常用of。
在some，any，few，none，all，both，neither，most，each 等代词或数词的前、后可以用of which/whom。
☞John invited about 40 people to his wedding，most of whom are family members.约翰邀请了大约40人参加他的婚礼，他们当中绝大部分是家庭成员。
3.有时＂介词＋where＂可以引导定语从句，此时要和＂介词＋which＂引导的定语从句从意思上加以区别。
☞His head soon appeared out of the window，from where he saw nothing but trees.他的头很快从窗口探了出来，从那里除了树木他什么也看不到。
(from where相当于from out of the window，而不是from the window)●在定语从句中，含介词的短语动词不可拆开使用(短语拆开后含义发生变化)，如look after, look for 等。
●＂of which / whom＂有时可以用＂whose＋名词＂结构来改写。
2020年高考英语语法考点讲解与真题分析专题7：定语从句(二)
2020年高考语法考点讲解与真题分析07定语从句（二）考点二“介词+关系代词”引导定语从句“介词+关系代词”在从句中作定语或状语。
能用于这一结构的关系代词只有whom,which, whose三个，whom, which作宾语，whose作定语。
这一结构的中介词由两个方面来确定：与先行词的搭配；与从句谓语动词的搭配。
1. We choose this hotel because the price for a night here is down to $20, half of ________ it usedto charge. （2017江苏）A. thatB. whichC. whatD. how【答案】B【解析】这里是“介词+关系代词”引导的定语从句，排除C、D；“介词+关系代词”中，关系代词不能用that，故选B。
2. In 1963 the UN set up the World Food Programme, one of __________ purposes is to relieve worldwide starvation.（2017江苏）A. whichB. itsC. whoseD. whom【答案】C【解析】这里是“介词+关系代词”引导的定语从句，关系词在从句中作定语，修饰purpose，故用关系代词whose。
3. Many young people, most _________ were well-educated, headed for remote regions to chase their dreams. （2016江苏）A. of whichB. of themC. of whomD. of those【答案】C【解析】这里是“介词+关系代词”引导的定语从句，排除B、D；关系代词指代people，故用关系代词whom。
4. Creating an atmosphere ______ employees feel part of a team is a big challenge. (2015浙江)A. asB. whoseC. in whichD. at which【答案】C【解析】这是一个含有定语从句的复合句，关系词在从句中作状语，只能用“介词+关系代词”，先行词是atmosphere，表示“在……氛围中”，应用介词in。
2019年高考英语考点一遍过 考点24 介词+关系代词引导的定语从句-之备战高考全攻略含解析
2019年高考英语考点一遍过—之备战高考考点24 ＂介词＋关系代词＂引导的定语从句高考频度：★★★★★考向一＂介词+关系代词＂引导的定语从句●＂介词＋关系代词＂的用法当关系代词在定语从句中作介词宾语时，我们通常用＂介词＋关系代词＂引导定语从句。
如果指＂人＂，用＂介词＋whom＂；如果指＂物＂，用＂介词＋which＂。
●＂介词＋关系代词＂结构中介词的选用1.一般来说，确定关系代词前的介词，可以从以下三方面入手：①先行词的意义；②从句中的动词或形容词与先行词的固定搭配；③句子的意思。
☞I’ll never forget the time during which I spent my childhood in the country.我永远不会忘记孩童时代我在乡村度过的时光。
2.表示＂整体和部分关系＂，介词常用of。
在some，any，few，none，all，both，neither，most，each等代词或数词的前、后可以用of which/whom。
☞John invited about 40 people to his wedding，most of whom are family members.约翰邀请了大约40人参加他的婚礼，他们当中绝大部分是家庭成员。
3.有时＂介词＋where＂可以引导定语从句，此时要和＂介词＋which＂引导的定语从句从意思上加以区别。
☞His head soon appeared out of the window，from where he saw nothing but trees. 他的头很快从窗口探了出来，从那里除了树木他什么也看不到。
(from where相当于from out of the window，而不是from the window)●在定语从句中，含介词的短语动词不可拆开使用(短语拆开后含义发生变化)，如look after, look for等。
2023年高考英语知识精讲：定语从句用法及考点分析
2023年高考英语知识精讲：定语从句用法及考点分析定语从句一般位于先行词的后面，定语从句由关系代词who，whom，whose，which，that，as和关系副词when，where，why等引导。
关系代词和关系副词在定语从句中担任一个成分。
一、关系代词引导的定语从句1、who指人，在从句中作主语That is the man who teaches us English.那位就是教我们英语的那个人2、whom指人，在句中作宾语，常可省略The professor (whom) you wish to see has come.你想见的那位教授已经来了3、whose通常指人，也可指事物，在从句中作定语This is the scientist whose name is known all over the country.这就是那位闻名全国的科学家4、which指事物，在从句中作定语或宾语，作宾语时，常可省略。
A dictionary is a book which gives the meaning of words.词典是解释词语的书5、that指事物，也可指人，在句中作主语或宾语，作宾语时，常可省略She is the only one among us that knows French.她是我们当中唯一懂法语的人5、as引导的定语从句as也可以用作关系代词，既可以单独引出定语从句，又可与主句中的the same或such相呼应，从句中谓语动词常省略We jumped for joy at the news，as was natural.我们听到消息时高兴地跳了起来，这是很自然的事情二、关系副词引导的定语从句1、when表示时间，其先行词往往是表示时间的名词（如time，day，hour，year等）From the time when he was little，he had known what he wanted to be when he grew up.从小时候起，他就已经知道长大后做什么2、where表示地点，其下先行词往往是表示地点的名词（如place，room，house，street，area等）Is this the room where we were living last winter.这就是我们去年冬天住过的房间吗？3、why表示原因，常用在先行词reason后面I don't know the reason why she looks unhappy today.我不知道为什么她今天看上去不愉快三、关系代词前带介词的定语从句1、关系代词which，whom在定语从句中作介词的宾语时，从句常由“介词+which（或whom）”引出Great changes are taking place in the city in which they live.他们所居住的城市正在发生着巨大的变化This is the teacher from whom we‘ve learns a lot.这就是我们从他那里学到很多东西的那位老师2、定语从句也可以由“名词（或代词或数词）+介词+which（whom）”引出The house the windows of which were damaged has now been repaired.窗子遭破坏的那幢房子现在已经修理好了四、四种类型的定语从句只能用that引导1、、当先行词是不定代词时，如all，much，something，anything，everything，little，none等词时，定语从句引导词多为that例1：Tell me everything that you know about it.把你知道的都告诉我。