定语从句专讲
高中英语：定语从句专项讲解
高中英语：定语从句专项讲解【基础回顾】考点归纳：定语从句在句中做定语，修饰一个名词或代词，被修饰的名词词组或代词即先行词。
定语从句通常出现在先行词之后，由关系词（关系代词或关系副词）引出。
1.关系代词引导的定语从句2.关系副词引导的定语从句3.判断关系代词与关系副词4.限制性和非限制性定语从句5.介词+关系词6.as, which 非限定性定语从句7.关系代词that 的用法一、关系代词引导的定语从句关系代词所代替的先行词是人或物的名词或代词，并在句中充当主语、宾语、定语等成分。
关系代词在定语从句中作主语时，从句谓语动词的人称和数要和先行词保持一致。
1、who, whom, that限定性定语从句中的关系代词作主语作宾语作定语指人who/that whom/that(可省略) whose指物which/that which/that(可省略) whose指人和物that that whose非限定性定语从句中的关系代词作主语作宾语作定语指人who whom whose/of whom指物which which whose/of which特殊情况：只能用that的情况，先行词为everything，all，little，much等不定代词时；先行词被all，every，no，any，some，little，much，one修饰时；先行词被the only，the very，the same，the last修饰时；先行词被序数词或形容词最高级修饰时；先行词是be的表语或there be 的主语时；先行词有人又有物时；当主句是以who或which开头的特殊疑问句时。
不能用that的情况介词前置时；非限定性定语从句中先行词本身是that多用who，不用that的情况。
先行词为anyone，one，ones时；先行词为those，he和people时；这些词代替指人，whom在定语从句中指人，"who"和“that”既可作主语又可作宾语（作宾语可以省略,who作宾语变为whom），that可以指人也可以指物, who不可指物。
董宇辉定语从句讲解
1. 定义：定语从句是一个句子，用作定语来修饰一个名词或代词。
被修饰的名词或代词被称为先行词。
2. 结构：定语从句由关系代词（如that、which、who等）引导，紧跟在先行词之后。
例如：The man
who is standing there is my teacher.（站在那里的那个人是我的老师。
）
3. 关系代词的作用：关系代词在定语从句中充当主语或宾语的替代词，指代先行词所指代的名词或代
词。
4. 关系代词的种类：根据在定语从句中所充当的成分，关系代词可以分为关系代词that、关系代词
which、关系代词who、关系代词whom等。
其中，that可以代替关系代词who或which，在从句中充当主语或宾语；which可以代替关系代词that或who，在从句中充当主语或宾语；who可以代替关系代词that或which，在从句中充当主语或宾语；whom可以代替关系代词that或who，在从句中充当宾语。
5. 使用注意事项：使用定语从句时需要注意以下几点：
先行词必须是名词或代词，不能是句子；
关系代词在从句中充当的成分必须是名词性的，不能是形容词性的；
关系代词不能省略，除非先行词在从句中充当宾语且该宾语在从句中是可省略的。
通过以上讲解，可以看出董宇辉对于定语从句的讲解非常全面，既包括定义、结构，也包括关系代词的作用和种类等细节内容。
这对于学生和英语学习者来说是非常有帮助的，能够加深对定语从句的理解和应用。
初中定语从句语法讲解完整版
初中定语从句语法讲解完整版•定语从句基本概念•关系代词引导定语从句目录•关系副词引导定语从句•介词+关系词引导定语从句•特殊类型定语从句•定语从句在句子中成分和位置•总结回顾与拓展延伸01定语从句基本概念定义与作用定义定语从句是对名词或代词进行修饰、限定的从句，其作用是提供更多关于所修饰词的信息。
作用使句子表达更具体、生动，有助于读者或听者更准确地理解所表达的内容。
前置定语通常将定语从句放在被修饰词的前面，如“漂亮的花园”中，“漂亮的”就是前置定语。
将定语从句放在被修饰词的后面，用逗号隔开，如“花园，漂亮的”中，“漂亮的”就是后置定语。
对被修饰词进行必要的限定，使句子意思更明确，如“我喜欢那本红色的书”中，“红色的”就是限定性定语从句。
对被修饰词进行补充说明，去掉后不影响句子意思的完整性，如“我昨天买了本书，它是关于历史的”中，“它是关于历史的”就是非限定性定语从句。
后置定语限定性定语从句非限定性定语从句结构形式与其他从句区别与名词性从句区别名词性从句在句子中充当主语、宾语等成分，而定语从句则充当定语成分，修饰名词或代词。
与状语从句区别状语从句表达主句动作发生的时间、条件、原因等背景信息，而定语从句则对名词或代词进行修饰、限定。
与同位语从句区别同位语从句对前面的名词进行解释说明，两者处于同等地位；而定语从句则对前面的名词进行修饰、限定，处于从属地位。
02关系代词引导定语从句关系代词种类及用法关系代词种类常见的关系代词有who，whom，whose，that，which，as等。
用法关系代词在定语从句中充当主语、宾语、定语等，连接先行词和从句，起到桥梁作用。
限制性定语从句中关系代词省略情况省略条件在限制性定语从句中，当关系代词在从句中充当宾语时，可以省略。
示例The book (that) I borrowed from the library is veryinteresting. 我从图书馆借的那本书很有趣。
《定语从句》 讲义
《定语从句》讲义一、定语从句的定义和作用定语从句是一种在英语中非常常见且重要的语法结构。
它在句子中充当定语，用来修饰一个名词或代词，使其含义更加明确和丰富。
简单来说，定语从句就是一个句子，放在被修饰的名词或代词后面，起到描述和限定的作用。
通过定语从句，我们能够更详细、更准确地表达我们想要表达的意思。
比如，“The book that I bought yesterday is very interesting”（我昨天买的那本书非常有趣。
）在这个句子中，“that I bought yesterday”就是一个定语从句，用来修饰先行词“the book”，让我们清楚知道是哪一本书有趣。
二、定语从句的构成定语从句通常由关系词（关系代词或关系副词）引导。
常见的关系代词有：that、which、who、whom、whose。
常见的关系副词有：when、where、why。
关系词在定语从句中不仅起到引导的作用，还在从句中充当一定的成分。
例如，在“The man who is standing there is my teacher”这个句子中，“who”是关系代词，在从句“who is standing there”中作主语。
三、关系代词的用法1、 that 和 whichthat 和 which 都可以用来指代物，但在一些情况下，只能用 that 不能用 which。
当先行词是不定代词（如 all、anything、nothing 等）、先行词被最高级、序数词修饰、先行词既有人又有物时，通常用 that 而不用 which。
例如：All that glitters is not gold（发光的未必都是金子。
）This is the first book that I have read（这是我读过的第一本书。
）The man and the horse that fell into the river were drowned（掉进河里的人和马都淹死了。
1.定语从句（形容词性从句）专题讲解
定语从句（Attributive Clause）一关系代词引导的定语从句(who/whom/whose/which/that)1.Who,指代范围是人，句子中充当主语/宾语（限定性定语从句中作宾语可省略）①作主语The boy who is standing there is my cousin.②作宾语The young man(who)Jane loves is standing there.2.Whom,指代范围是人，句子中只充当宾语（限定性定语从句中作宾语可省略）The man(whom) you met yesterday is my teacher.注意：紧接着介词后面作介词的宾语时只能用whom,不用who；如果介词在词尾两者都可以。
①This is the person from whom I learn about news.②This is the person who/whom I learn about news from.不过按照习惯，一般介词都会放在前面，①中那样比较常见。
3.Whose(of whom/of which),指代范围人/物，句子中充当定语①Do you know the boy whose father(the father of whom) is an teacher?②He lives in a house whose windows (the window of which) face south.注意：“介词+关系代词”从句中作定语时被修饰词常常需要提前。
There is a room, the window of which faces the river.4.Which 代指物，句子中充当主语/宾语（限定性定语从句中作宾语可省略）①Children like to read books which have wonderful pictures.②The pen(which) my uncle gave me is missing.注意：which除了指物以外，还可以指代婴儿、动物和表示表示单数意义的集合名词，此外还可以指人的职业、地位或品格等。
定语从句句法讲解
定语从句（一）定语从句：在复合句中修饰某一名词或代词的从句叫做定语从句，它的作用相当于一个形容词，也叫形容词从句（由一个句子来充当定语，叫定语从句）（如果定语是单个词,定语放在被修饰词的前面,如果是词组,定语放在被修饰词的后面）Eg. The book (that he bought yesterday) is worth reading先行词 关系词The girl (who is standing there) is my good friend.先行词 在句子中作成分（二）先行词：被定语从句修饰的名词或代词被称为先行词，先行词可指人或物。
（三）关系词：一．定义：引导定语从句的连接词（引导词）被称为关系词二．作用 引导定语从句连接主句和从句代替先行词在定语从句中担任句子成分三．分类及其用法：关系代词：定语 主、宾、表（其中who whom whose 指人， which 指物， that 指人或物）关系副词： when where why时间状语 地点状语 原因状语表格A ．关系代词用法：1.which(whom)在从句中作介词的宾语时，介词一般可放在原来位置上 也可放在其前面，在含有介词的固定词组中介词只能放在原来的位置上2.只能用that,不用which 的情况（1）先行词前有序数词(数词)或最高级修饰时The first place that we visited in Beijing is the Great wallTom is the cleverest student in his class（2）先行词是不定代词时（something, anything, nothing, all, none, some, little 等）Miss Zhang has told us something that we should do in the holiday.I like all the book that you lent me last week.（3）先行词既有人又有物时They think of people and things that happened in their childhoodThe school and children that he loves moved to another country.（4）先行词前有the only, the very, the same, the last, just 等修饰时The only furniture that he has in the room is a desk（5）先行词有who （或whom ）时Who is the man that is reading a book over there?Who that break the window should be punished ． 谁打碎了窗户都要受到惩罚．Whom that you talked to must be Tom.（6）there be 结构中，先行词指物时There is a book on the desk that I am very interested in.（7）先行词指物，在主句中做表语时This is the book that you borrowed from library（8）先行词是the way或the reason时，that可作关系副词，也可省略It was the way that he solved the problems(9) 先行词为that, this, those 或these且指人时Those who hadn't bought the tickets for the train crowded in the waiting hall.那些还没买着票的人拥挤在候车厅里。
定语从句讲解
定语从句专题教案定语从句（Attributive Clauses）定义：在主从复合句中修饰名词或代词的从句叫定语从句。
定语从句的特点：1.位置：定语从句一般都紧跟在它所修饰名词的后面。
2.先行词：被定语从句所修饰的名词或代词叫“先行词”。
3.关系词（引导词）：引导定语从句的词叫“关系词”。
1. I’ll never forget the days that we worked together.2. I’ll never forget the days when we spent together.答案:1.that改为when 2.when 改为that 错误分析:关系代词和关系副词使用混淆Step2.关系代词和关系副词的作用正确选择关系词是掌握定语从句的关键。
关系词的选择完全取决于关系词在定语从句中所充当的句子成分。
关系词一共有9个, 它们在从句中所充当的句子成分见下表。
Step3.考点一：如何判断用关系代词还是关系副词I will never forget the day when I first went to school.which/that we spent in Beijing.The house which/that we visited is being repaired now.The house where Lu Xun once lived is being repaired now.巩固性训练：用关系词填空1.The man ___________ came to our school is Mr. Wang.2.A child __________ parents are dead is called Tom.3.Could you tell me the reason ______ you are late.4.I don’t know the boy __________ you talked with.5. Beijing is the place ________ I came.6.Gone are the days ____ we used foreign oil.答案1.who/that 2.whose 3.why 4.(whom/that) 5.where 6.when提示::引导词用关系代词还是用关系副词关键要看他们在从句中作什么成份而定。
初中英语语法专题—定语从句讲解
初中英语语法专题—定语从句讲解一、什么是定语从句？定语从句是用来修饰名词或代词的从句。
它通常紧跟在被修饰的名词或代词后面，并对其进行进一步的说明或限制。
二、引导定语从句的关系词引导定语从句的关系词主要有：that, which, who, whom, whose, when, where等。
- that用于修饰物，常用来引导限制性定语从句；- which用于修饰物，既可以引导限制性定语从句，也可以引导非限制性定语从句；- who用于修饰人，常用来引导限制性定语从句；- whom用于修饰人，在非正式情况下，常省略为who，也可以引导非限制性定语从句；- whose表示所属关系，修饰人或物；- when表示时间，在定语从句中用来引导时间状语从句；- where表示地点，在定语从句中用来引导地点状语从句。
三、定语从句的位置和用法定语从句可以位于句首、句中或句尾，用来修饰名词或代词。
它可以进一步说明名词的性质、特征、来源等。
以下是一些示例：1. The book that you borrowed from me is very interesting.that you borrowed from me is very interesting.你从我这里借的那本书非常有趣。
2. The girl, who is wearing a red dress, is my sister.who is wearinga red dress, is my sister.那个穿红裙子的女孩是我的妹妹。
3. The city where I was born is very beautiful.where I was born is very beautiful.我出生的城市非常美丽。
4. I have a friend whose father is a doctor.whose father is a doctor.我有一个朋友，他的父亲是医生。
定语从句的讲解「最全」
定语从句的讲解「最全」定语从句的讲解「最全」一. 知识疏理：1. 定语从句2. 先行词3. 关系词的用法：包括关系代词与关系副词二. 专题讲解：一. 是定语从句?定语可以由形容词、名词、代词、数词、分词、副词、不定式以及介词短语等来充当，也可以由一个句子来充当。
定语从句用来修饰名词、代词或整个主句。
充当定语功能的句子称为定语从句。
汤姆是一个用功的学生，他在班里总是第一名。
(修饰名词student。
) 80多个国家都在踢足球，因此足球很流行。
(修饰整个主句Football is played over 80 countries。
)三. 先行词与关系词1. 什么是先行词：被定语从句修饰的名词、代词称为先行词。
e.g: Don’t forget 别忘了我让你带的书。
(the book为先行词。
)2. 什么是关系词：引导定语从句的关联词为关系词，分为关系代词与关系副词。
关系代词在定语从句中作主语、宾语、表语、定语等，关系副词在定语从句中作状语。
关系代词有：that, which, who, whom, whose……关系副词有：where, when, why, ……e.g: I will never forget the days when I stayed in New York.注意：①关系词一般紧跟在先行词之后引导定语从句。
定语从句总在被修饰的先行词后面。
②在定语从句中，关系代词起着代词和连词的作用，关系副词起着副词和连词的作用。
③在定语从句中，关系词代替先行词，因此在定语从句中不能再重复作用相当于先行词的词。
下面的句子是错误的：This is the right book that you are looking for the book.(应去掉the book。
)This is the right book that you are looking for it.(应去掉it。
)①常见的关系代词②常见的关系副词e.g: Our chemistry teacher is a man can make his class lovely and interesting.我们的化学老师可以使他的课堂生动有趣。
定语从句讲解
定语从句讲解第一步：定语的概念，修饰名词就叫定语。
第二步：从句的概念，用一个句子来修饰名词，原因是世界上的形容词不够用了，我们要用句子来修饰名词；第三步：从句部分，who、that、which等这些关系代词。
在从句当中做什么成分，有的时候做主语，有的时候做宾语。
知道这一层结构，才可以知道定语从句跟主语的关系，以及关系代词跟从句的关系，写出完美的从句。
定语从句我们拆成两部分来说，一个叫定语，一个叫从句。
所谓定语，就是形容一个名词，修饰一个名词，从句就指的是用句子来做定语来修饰这个名词。
我们可以这么想，有的时候我们需要用形容词来修饰名词，这就是普通的定语，但有的时候形容词不够用了，我们需要用一个句子来修饰一个名词，比如说我喜欢吃妈妈做的饭，“妈妈做的饭”这就是一个定语从句，如果说，世界上有一个形容词来表达妈妈做的这个含义，那我就不需要这个句子来做定语了，可是我们想一想，世界上上有哪一个词来表达“妈妈做的”这个含义呢，没有这个词，我们自然而然需要一个句子来做定语，那就叫作定语从句了。
定语从句我们看一下，He is a man，who has a English book。
“who has a English book”就是一个句子，它作定语修饰这个“man”，什么什么的人，一个拥有一本英语书的人。
这就是一个定语从句了。
不管是中文还是英语，都有这个概念。
我们再看一下从句部分，“who has English book”我们看一下“who”在从句当中，做什么成分，“who”在从句中做主语，这个时候我们说，“who”所指代的先行词，这个“man”在从句中做主语，我们看一下是不是做主语，“The man has a English book”很明显，“The man ”是做主语的。
定语从句专题讲解课件(共53张PPT)课件
（作主语）
which / that 作宾语 ： （可省略）
This is the card. I’ve just received the card.
This is the card which / that I’ve just received.
The man is a worker.
The man is speaking at the meeting.
分解
作主语
Whom 作定语从句的宾语
01
The woman whom they wanted to visit is a teacher.
02
The woman is a teacher.
( )
（作宾语）
( )
1
关系代词who, that, whom引导的定语从句:
whom (作宾语)
2
如果先行词是表示人的名词或代词，关系代词应用who, that (作主语或宾语)
who / that 作主语. (不能省)
a girl who likes red .
I now
定语从句
在复合句中，修饰名词或代词的句子叫定语从句。
两个句子
两个词
主 句
从句
？
01
I know a girl
02
03
who likes red.
04
Jim reads books
05
which are fun.
06
从句
07
完整的句子是主句
01
The thief has been sent to prison. The police caught the thief last night.
定语从句专题讲解课件(共53张PPT)
who, whom, whose, that用法区别.
who 作定语从句的主语或宾语.
The man who is speaking at the meeting is a worker.
The man is a worker. 分解 The man is speaking at the meeting. 作主语
2.关系代词who, that, whom引导的定语 从句:
如果先行词是表示人的名词或代词， 关系代词应用who, that (作主语或宾语) whom (作宾语)
who / that 作主语. (不能省) This is the film star. The film star is very popular in China. This is the film star who / that is very popular in China. (作主语) Practise: 1.The boy called Roy. The boy broke the window.
3. 当先行词有the very, the only, the same等修 饰时。 1).That’s the only thing that I can do now. 2).These are the very words that he used.
高中英语定语从句讲解
定语从句Ⅰ. 概念：(1) 定语从句：定语从句是由关系代词或关系副词引导的从句，其作用是作定语修饰主句的某个名词性成分，相当于形容词，一般紧跟在它所修饰的先行词后面。
(2) 先行词：被定语从句修饰的成份。
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，分为关系代词和关系副词。
关系词的作用：1) 引导定语从句；2) 必在定语从句中担当一个成份（可以做主语，宾语，表语，定语，状语）；3）代替先行词。
常用的关系代词: that,which,who,whom,whose常用的关系副词(在从句中只作状语) when、why、where 定语从句三步：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、宾语或状语）；第三选择合适的关系词。
Ⅱ. 关系代词：●that: 可指人或物；在定语从句中作主语，宾语，表语，在从句中作宾语时常可省略。
(指人时，相当于who或whom；指物时，相当于which)(不能用于非限制性定语从句; that前不能有介词) 如：1.What is the question (that/which) they are talking about? 2. Here is the man ( who/whom/that ) you want to see.●which: 指物；在定语从句中作主语，宾语，表语，做宾语时可省略。
如：The book (which/that) I bought yesterday is very interesting.（宾语）●who, whom, whose: who:在从句中作主语、宾语，只可指人。
whom:在从句中作宾语，只可指人。
whose:在从句中作定语，可指人也可指物。
1.All who heard the story were amazed. (先行词是any, those, all,one,ones时用who)2.He's a man (whom/who/that) we should learn from.（宾语）3.A child whose parents are dead is called an orphan.（人）4.I'd like a room whose window faces south. （物）▲关系代词作介词宾语: 关系代词在定语从句中用作介词宾语时, 介词可放于从句之首, 也可放于从句之末. 但以放于句首较为正式.（介词前置，必须注意不影响动词词组的含义。
英语语法之定语从句专项讲解
英语语法之《定语从句》定语从句通常分为两类：限制性和非限制性定语从句。
I．限制性定语从句1．关系代词who的省略1）当从句的动词为be，表语为以－able结尾的形容词，则关系代词和be通常均可省略。
例如：The only person (who was) visible was a policeman.唯一能看见的人是一位警察。
2）当从句的动词使用进行时态时，be和关系代词均可省略，变为分词短语作定语：The man (who was) driving the lorry was drunk.开这辆卡车的司机醉了。
The woman (who is ) holding a baby in her arms is waiting to see the doctor.怀里抱一个孩子的那个妇女在等着看医生。
The boy (who is) sitting in the corner is my nephew.坐在角落里的那个男孩是我的外甥。
3）当从句的动词为通常不使用进行时态的动词时，可以将关系代词去掉，变为分词短语：Anyone wishing (=who wishes) to leave early may do so.愿意早走的人请自便。
Anyone knowing (=who knows) anything about the crime is asked to communicate with the police.知情人须和警察联系。
4）口头语言中，there is／was，it is／was后定语从句中作主语的关系代词常可省略：There‘s somebody at the door wants to see you.（=There's somebody who wants to see you at the door.)门口有人要见你Who was that called a few minutes ago?(=Who was that who called a few minutes ago?)几分钟前打电话来的那人是谁？2. whom介词后使用whom作宾语，但实际应用中常放从句前，由who或that代替，而将介词置于从句尾：The woman to whom I was talking didn’t understand much about the organization.= The woman who I was talking to didn’t...=The woman that I was talking to didn't….我和谈话的那位妇女对这个组织一无所知。
初中数学定语从句专项语法讲解
初中数学定语从句专项语法讲解定语从句是英语中常用的一种从句结构，用来修饰名词或代词，进一步限定其意义。
在初中数学研究中，掌握好定语从句的用法是非常重要的。
本文将对初中数学定语从句的专项语法进行讲解。
1. 什么是定语从句？定语从句是指在句子中作为定语的从句。
它通常由关系词（that, which, who等）引导，并限定或修饰先行词（名词或代词）。
定语从句可以进一步解释或补充先行词的信息，使句子更加准确和完整。
2. 定语从句的关系词常用的定语从句关系词包括：- that: 指代人和物，可以作为主语或宾语- which: 指代物，可以作为主语或宾语- who: 指代人，用于作为主语- whom: 指代人，用于作为宾语- whose: 指代人或物，用于表示所有关系关系词的选择要根据其引导的定语从句在句子中的作用和先行词的情况来确定。
3. 定语从句的位置定语从句在句子中的位置可以有两种情况：- 在先行词之后：The book that I bought yesterday is very interesting.我昨天买的那本书非常有趣。
- 在先行词之中：My brother, who is a doctor, lives in London.我的哥哥是个医生，住在伦敦。
4. 定语从句的用法定语从句可以用来修饰各种各样的名词或代词，进一步说明其特征或限定其范围。
以下是一些常见的定语从句用法：- 修饰人：The girl who is wearing a red dress is my sister.穿红裙子的那个女孩是我的妹妹。
- 修饰物：This is the house which was built last year.这是去年建造的房子。
- 修饰时间：Do you remember the day when we went to the zoo?你还记得我们去动物园的那一天吗？- 修饰地点：The city where I was born is very beautiful.我出生的那个城市非常美丽。
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The Attributive Clause (定语从句)定语从句修饰一个名词或代词的，或修饰整个主句的从句叫定语丛句。
例如：1. Long, Long ago there lived six blind men who lived in a village in India.2. One morning an elephant was led down the road where they stood.3. Wei Fang whose handwriting is the best in our class is having a talk with the teacher.4. Who’s the man( that /whom)you met at the station?5. Is there anything( that) I can do for you？6. Yesterday evening I saw a very good film, which was about the Anti-Japanese War.7. That’s the house whose door/the door of which faces south.8. A chemist’s shop is a shop which/that sells medicine.9. I don’t like such girls as you described.10. I have the same books as you have.11. Metals are such things as iron, silver and gold.定语从句分限制性定语从句和非限制性定语从句两种。
先行词被定语从句修饰的名词、代词或主句叫做先行词。
关系词引导定语从句的词叫做关系词。
有关系代词that which, who, whom, whose, as关系副词when ,where, why关系词放在先行词与定语从句之间，起联系作用，并作定语从句的一个成份。
关系词的功能：1. 引导作用 2.替代作用 3.成份作用错：The book which you want it is on the desk..对：The book which you want is on the desk.错：This is the man whom I saw him last night.对：This is the man whom I saw last night.关系代词的用法先行词是人时用who, that , whom, whose先行词是物时用that, which, whoseas 也可引起定语从句，多和such, same, as 连用。
关系代词在定语从句中作宾语时可省略。
关系代词whom, which 在定语从句中作介词宾语时，介词一般放在关系代词之前，也有时放在定语从句后面，但that 在定语从句中作介词宾语时，介词不能前置，whom 或which 如果在定语从句中作含有介词的短语动词的宾语时，介词不能前置，放在动词后面。
如果whom, which 省略，介词不能前置。
( T )1.This is the house in which I lived.( T )2.This is the house （which ）I lived in.( F )3.This is the house in that I lived .( T )4.This is the house（that）I lived in.( T )5.This is the house I lived in.( F )6.This is the house in I lived.( T )7.This is the key （which ）you are looking for( F )8.This is the key for which you are looking.关系代词that 和whichA. 下列情况只用that ,不用which1. 先行词为everything, anything, nothing, something, all, little, much 等不定代词时；例如：Pay attention to everything that I do.All that live must die.2. 先行词被the only, the very, the same, the last, one of 修饰时；例如：He was the only teacher that I knew in your school.You are the only person that can help me.This is the very book that I want to buy.3. 先行词被every, any, no, some, little, much, all修饰时；例如：I’ve read all the books that you gave me.Any girls that knew him were teachers.4. 先行词被序数词或形容词最高级修饰时；例如：Zhang Ming was the first boy that reached the mountain top that day.This is one of the most exciting football games that I have ever seen.5. 先行词包括人和物时；例如：He talked about the teachers and schools that he had visited.Can you see a man and his horse that are crossing the street?6. 主句是以who 或which 开头的特殊疑问句时。
例如：Who is the professor that is standing at the gate?Who is the man that is reading the newspaper over there?Who that knows him would believe him.B. 下列情况只用which , 不用that1. 作介词的宾语，紧跟介词之后；This is the house in which I lived.This is the factory in which we once worked.2．引导非限制性定语从句。
Taiwan is a part of China, which is known to all.as引导的非限制性定语从句可放在主句之前或之后，而which 只可放在主句之后。
As is known to us all, we have made great progress in science and technology.This elephant is like a snake, as anybody can see.Liu Guoliang failed in the game, which made us so sorry.关系副词的用法when表示时间，在定语从句中做时间状语；语从句中做原因状语。
where表示地点，在定语从句中做地点状语；why表示原因，在定1. When，where只是副词，在定语从句中只做状语，不能用做从句的主语或宾语。
例如：This is the hospital where/in which his father works.This is the hospital that we visited yesterday.We visited a factory which/ that makes toys for children.We visited a factory where /in which Li Ping’s mother once worked.One morning an elephant was led down the road where the blind men stood.I’ll never forget the days when we worked together.错: Do you still remember the days when we spent in the countryside?对: Do you still remember the days( that/which) we spent in the countryside?错: Is this the road where they built last year?对: Is this the road( that /which) they built last year?请判断正误:( 正)This is the factory where his father works.( 误)They work in a factory where makes radio parts.( 正)Do you know the reason why she was late?( 误)Can you tell me the year that Lu Xun was born?2. time做先行词，前面有序数词和last修饰时，引导定语从句不能用when，用that 或两者都不用。
例如：The first time I saw him was in 1980.This is the last time that I shall give you a lesson.3. 关系副词在time, day, moment, reason, place后可省略。
例如：The cat burnt her paw each time（when ）she pulled nut out.Help never stopped coming from the day (when)she felt ill.That’s the reason (why) I did it.This is the place (where)we met yesterday.4. 在the moment…,the minute…, the instant…,every time…, any time…的结构中，一般用that 代替when,但是，习惯上什么词都不填。