（完整）牛津高中英语语法定语从句.doc
高二英语定语从句 牛津英语
练习 2： １．翻译下列句子： A.That was an island, whose name I have forgotten. B.The friend with whom I was traveling during the summer vacation could speak four languages. C.He is changing his mind all the time, which makes me quite angry. D.I lost the book he lent to me last week, for which mistake I should apologize.
定语从句
B.在一些特殊句中，where和 when 可省略： a.有时可省略where: e.g. ^ This is the place (where) we met yesterday. b.省略when: 先行词为every time, the first time, any time, the moment 等时可省略when: e.g. ^ She came to visit me the moment I was about to leave. ^ Call me any time you want to.
定语从句
2.两种从句的直观区别就是非限制性定语从句的主从句中间应用“,”隔开。 3.翻译成中文时，限制性定语从句翻译为“…的”，先翻译从句，后翻译主句；而非限制性定语从句在译文中不作，一般先译主句，后翻译从句。 e.g. ^ Sunday is the day people don’t have to work. 星期天是人们不必工作的日子。 ^ Sunday is a holiday, when people don’t have to work. 星期天是假日， 这天人们不必工作。
牛津高一模块一Unit 1 语法定语从句 part9
总结：从句中要省略跟主句表示的相同的词。
关系词在定语从句中充当： attribute （ 定语）： She has a brother .I can't remember his name. 1.先找到两句话中共有的名词。（ brother ） She has a brother whose name I can't remember.
I was glad that all my classmates were fond of the cake （that I made）.
先行词
定语从句 关系词
1.你可以选择你喜欢的科目。 定语从句公式：定语从句=先行词+关系词+从句 You can choose the subject which\that you like.
4.先行词student（学生）可以选关系词 who\whom\whose.然后看从句：_____ the teachers fail. 缺少（主语？宾语？定语？） 所以可以选who\whom. 5.先行词classes(科目)，从句缺宾语所以只能选which。 6.take the classes,缺宾语，所以选关系词 which. 7.先行词teacher（老师）可以选关系词 who\whom\whose.然后看从句：_____ class.缺定语。 所以只能选whose. 8.先行词teacher（老师）然后看从句：_____ they like or respect. 缺少宾语 所以可以选who\whom.
地点状语，时间状语where，when省略介词
1.先行词student（学生）可以选关系词 who\whom\whose.然后看从句：_____ study(学习、 动词) in the USA. 缺少（主语？宾语？定语？） 所以只能选who. 2.先行词time(时间)可以选which\whose.从句____they spend。缺宾语， 所以只能选which。 3.先行词student（学生）可以选关系词 who\whom\whose.然后看从句：_____ do not make good use of their time.缺少（主语？宾语？定语？） 所以只能选who.
牛津高中英语-定语从句1
一定语从句：定语从句的介绍1 就像是一个形容词或介词短语修饰名词一样，定语从句也可以修饰名词。
定语从句所修饰的名词称为先行词。
形容词：The green team介词短语：The team in green定语从句：The team who were wearing green2定语从句通常由关系代词来引导，如which, that, who, whom, whose,或关系副词来引导，如when, where, why。
关系代词可以在定语从句中担当主语，宾语，表语，定语；关系副词可以在定语从句中担当状语。
如：做主语The trees which are on the school campus have lost their leaves.做宾语The student whom we saw just now is the best runner in our school.做表语Jack is no longer the lazy boy that he used to be.做定语She has a brother whose name I can’t remember.做状语The school where he studied is in Shenzhen.二定语从句：关系代词：that，which，who，whom，和whose1．在定语从句中，that和which用来指代物。
如：This is the story that /which we wrote for our storytelling contest.2．在定语从句中，who 用来指代人。
如：I am going to see a friend who has just come back from the UK.3．当who在定语从句中做宾语时，可以用whom来取代，且whom比who更正式。
如：I don’t know the name of the teacher who/whom I saw in the computer room the other day. 4．当关系代词在定语从句中做宾语时，who，whom，which和that可以被省略。
定语从句-牛津英语高一
方法同上：介词 先行词 先行词， 从句谓语动词 动词有关 方法同上：介词+先行词， 从句谓语动词有关
Solve the problem in my way That\which _____ I do with it in . 作in的宾语 的宾语
in which\ that Solve the problem in my way ___________ ___________ \也可以省略 也可以省略 +in the way I do with it in .
1先行词是事物从句主宾语从句whichthat2先行词是人做从句主语从句thatwho先行词是人做从句宾语从句thatwhowhom3先行词表示谁的代词从句4先行词做从句宾语关系词thatwhichwhowhom可以省略whosewhosewhose1which只能修饰2who只能修饰可以做从句主语宾语whom只修饰只能做从句人3可以修饰人和事物
when
in ______ the month
in The campus _____which I earn respect where in ______ the campus on The hill _____which I find much fun where on ______ the hill
why The reason_____ I want to run the club The day when I saw you ______ the canteen where _______I have desserts
When\ On I ‘ll never forget the day ________ which
1 ） 先 行 词 是 事 物 _____________+从句 which/that _____________+从句
牛津版牛津高中英语语法总结(权威)
高中牛津英语一定语从句：定语从句的介绍就像是一个形容词或介词短语修饰名词一样，定语从句也可以修饰名词。
定语从句所修饰的名词称为先行词。
形容词：The green team介词短语：The team in green定语从句：The team who were wearing green定语从句通常由关系代词来引导，如which, that, who, whom, whose,或关系副词来引导，如when, where, why。
关系代词可以在定语从句中担当主语，宾语，表语，定语；关系副词可以在定语从句中担当状语。
如：做主语The trees which are on the school campus have lost their leaves.做宾语The student whom we saw just now is the best runner in our school.做表语Jack is no longer the lazy boy that he used to be.做定语She has a brother whose name I can’t remember.做状语The school where he studied is in Shenzhen.二定语从句：关系代词：that，which，who，whom，和whose在定语从句中，that和which用来指代物。
如：This is the story that /which we wrote for our storytelling contest.在定语从句中，who 用来指代人。
如：I am going to see a friend who has just come back from the UK.当who在定语从句中做宾语时，可以用whom来取代，且whom比who更正式。
如：I don’t know the name of the teacher who/whom I saw in the computer room the other day.当关系代词在定语从句中做宾语时，who，whom，which和that可以被省略。
牛津高中英语模块一语法定语从句1
Lift is a cage that goes up and down in a tall building.
Library is a building that stores lots of books for readers.
课文中的定语从句
Para 2:
I sat next to a girl. Her name was Diana. 定语从句= 定语从句= I sat next to a girl whose name was Diana.
Para 3 I loved the lessons. She gave lessons in English Literature. 定语从句= 定语从句= I loved the lessons that she gave in English Literature.
Relative pronouns 关系代词
1. The film_____I saw yesterday is very moving.
that/which/不填 不填
that/which/不填 不填 2. He lost the watch _____his father gave him. who/that 3. The man _____talked with you just now is our principal. whose 4. Do you know the girl _____ponytail is long?
Exercise: My friend has a dog. The dog’s eyes are of different colors. My friend has a dog whose eyes are of different colors. My friend has a dog of which the eyes are of different colors.
牛津高中英语定语从句语法讲解
牛津高中英语定语从句语法讲解牛津高中英语定语从句语法讲解牛津英语能够给那些仍然在前进道路上迷茫，或被惯性思维束缚的年轻人一些启示，让他们了解足够多的人生经验与哲理，能够以更轻松、更快乐的姿态去面对生活，也为迎接人生的辉煌做好准备。
以下是店铺整理的关于牛津高中英语定语从句语法讲解，希望大家认真阅读!一.定义1.定语从句：修饰某一句中的名词或代词的从句称为定语从句，一般紧跟在它所修饰的先行词后面。
被修饰的词称为先行词。
2.关系词：引导定语从句的关联词称为关系词The man who lives next to us is a policeman.先行词关系代词定语从句关系词有关系代词和关系副词。
关系代词有that, which, who, whom, whose, as等;关系副词有where, when, why等。
关系词常有3个作用：1.引导定语从句;2.代替先行词;3.在定语从句中担当一个成分。
二.关系代词引导的定语从句1.who指人，在从句中做主语The boys who are playing football are from ClassOne.2. whom指人，在定语从句中充当宾语，常可省略。
Mr. Liu is the person (whom) you talkedabout on the bus.注意：关系代词whom在口语和非正式语体中常用who代替，可省略。
The man who/whom you met just now is myfriend.3. which指物，在定语从句中做主语或者宾语，做宾语时可省略(1) Football is a game which isliked by most boys.(2) This is the pen (which) he bought yesterday.4. that指人时，相当于who或者whom;指物时，相当于which。
牛津高中英语模块一 Unit1 定语从句
关系分句&关系词的选择在复合句中起了形容词的作用，在句中修饰一个名词或代词的从句叫做关系分句（定语从句），被修饰的词叫做先行词（antececdent)，引导定语从句的词叫关系词，他的作用一是放在先行词与关系分句中间起了连接作用，二是在分句中担当一个成分，并与先行词保持数的一致。
关系分句分为限制性关系分句和非限制性关系分句。
关系词分为关系代词（that, who, whom, which, whose)、关系副词（when, where, when, why)和关系限定词（whose）.具体关系词的选择如下:考虑三个因素（限定性、指人还是指物、充当的成分）一般：who/whom/that指人which/that指物在限制性关系分句中关系词的选择1．thatthat在定语从句中可以指人也可以指物，在从句中作主语或宾语，但不能放在介词后作介词宾语。
如：The eggs that I bought yesterday were not fresh.我昨天买的鸡蛋不新鲜。
I prefer dumplings that have just been cooked.我更喜欢吃刚煮出来的饺子。
指物时that和which可以互换，但下面几种情况通常用that引导定语从句，不能用which。
（l）当先行词有最高级修饰或本身就是最高级时。
如：This book is the most difficult one that I have ever read.这本书是我所读过的最难的一本书。
The best that I could do was to apologize.我能做的最好的事情就是道歉。
（2）当先行词有序数词修饰或本身就是序数词时。
如：Here are two students，the third that you want is to come in a minute.这儿有两个学生，你要的第三个学生一会儿就来。
(完整)牛津高中英语语法【定语从句】
M1定语从句：关系代词、介词提前、关系副词、限制性一、基本概念（一）定语从句在复合句中作定语，修饰名词或代词的从句叫定语从句。
（二）先行词被定语从句所修饰的名词或代词。
一般情况下，定语从句紧跟先行词。
但也有因各种原因定语从句与先行词被分割的现象。
（三）关系代词和关系副词定语从句的引导词。
与先行词关系密切，因此紧跟先行词，并在定语从句中充当一个成分。
关系代词有：who, whom, which, that和whose, 另外，as也可充当关系代词。
关系代词在定语从句中充当主语、宾语、表语和定语。
关系副词有：when, where和why。
在定语从句中充当状语。
二、关系代词的用法（一）基本用法根据先行词的不同，和在从句中所充当的成分不同，选用不同的关系代词。
如下表：例如：（注意关系代词在定语从句中所充当的成分）①Do you know the professor who/that will give us a speech next week? （作主语）②I read a report about his new novel that/ which will soon be published. （作主语）③The plan that/which they argued about was settled at last. （作宾语）④This is the new secretary (who/whom/that)I would like to introduce to you. （作宾语）⑤The soldier whose legs were badly wounded was operated on without delay. （作定语）注意：关系代词在定语从句中充当宾语时可以省略，充当主语时则不能。
（见上例③④）（二）关系代词that代替which的一些情况which, that 在代替物时，一般可以通用。
牛津版牛津高中英语语法总结
牛津版牛津高中英语语法总结一定语从句：定语从句的介绍正如形容词或介词短语修饰名词一样，定语从句也可以修饰名词。
由定语从句修饰的名词称为先行词。
形容词：thegreenteam介词短语：团队精神定语从句：theteamwhowerewearinggreen定语从句通常由关系代词引导，如which、that、who、who或关系副词，如when、where、why。
关系代词在定语从句中可以充当主语、宾语、谓语和定语；关系副词可以充当定语从句中的状语。
如：做主语thetreeswhichareontheschoolcampushavelosttheirleaves.刚才看到的那个学生是我们学校的斯特伦内里做表语jackisnolongerthelazyboythatheusedtobe.她有一个兄弟，是美国公民做状语theschoolwherehestudiedisinshenzhen.定语从句：关系代词：that，who，who，who在定语从句中，that和which用来指代物。
这是我们为讲故事比赛写的故事在定语从句中，who用来指代人。
当定语从句中的宾语是who时，可以用who代替，who比who更正式。
如：helikesallthebirthdaypresents(that/which)hisfriendsgavehim.用来表示归属的人。
它既可以指人也可以指物。
如：isatnexttoagirlwhosenamewasdiane.每个星期六下午，会员所在的俱乐部都会到学校上课。
一定语从句：介词提前的定语从句（preposition＋which;preposition＋whom）当关系代词（which/who）作为定语从句中介的宾语时，介词可以放在关系代词前面。
例如：我们以为你是一个我们可以期待做出好决定的人在非正式英语中，介词通常放在定语从句的最后。
例如：艺术家是伊克诺维特学习的主题如果介词放在定语从句的最后，which可以被that取代，whom可以被that和who取代。
牛津英语定语从句
教学目标：定语从句讲解： 定语从句（1） 1、概念:在复合句中修饰名词或代词的句子.结构： 先行词 + 关系词 + 句子先行词：定语从句所修饰的名（代）词叫作先行词。
定语从句一般紧跟在先行词的后面。
关系词：关系代词：who, whom, that, which,whose 等关系副词: when, where, why 例句分析：Mary is a beautifu l girl. →形容词作定语Mary is a girl who has long hair.→句子作定语,修饰girl, 叫做定语从句合并句子:1.The man is a farmer. →The man who .↙ 先行词 关系词 定语从句主句：The man is a farmer.分析下列句子的成分：找出先行词、关系词、定语从句及主句1. The students who do n’t study hard will not pass2. The woman who you saw in the park is our English teacher.3. A shoe shop is a shop which sells shoes.4. The book that you want is on the desk.2、定语从句中关系代词的用法：1）. who 指人,作主语或宾语 (作宾语可省略）Eg: The man A person 2,如介词提前则不能省)3如介词提前则不能省)4）→ A plane is a machine He is the man.→He is the man 5）归纳：that,即指人又指物，作主语或宾语。
which,指物，作主语或宾语。
who, whom 指人,who 作主语,whom 作宾语。
Whose 指人或物， 作定语★that, which, whom 在定语从句中作宾语时，可省去。
牛津高中英语语法【定语从句】
M1定语从句：关系代词、介词提前、关系副词、限制性一、基本概念（一）定语从句在复合句中作定语，修饰名词或代词的从句叫定语从句。
（二）先行词被定语从句所修饰的名词或代词。
一般情况下，定语从句紧跟先行词。
但也有因各种原因定语从句与先行词被分割的现象。
（三）关系代词和关系副词定语从句的引导词。
与先行词关系密切，因此紧跟先行词，并在定语从句中充当一个成分。
关系代词有：who, whom, which, that和whose, 另外，as也可充当关系代词。
关系代词在定语从句中充当主语、宾语、表语和定语。
关系副词有：when, where和why。
在定语从句中充当状语。
二、关系代词的用法（一）基本用法根据先行词的不同，和在从句中所充当的成分不同，选用不同的关系代词。
如下表：例如：（注意关系代词在定语从句中所充当的成分）①Do you know the professor who/that will give us a speech next week? （作主语）②I read a report about his new novel that/ which will soon be published. （作主语）③The plan that/which they argued about was settled at last. （作宾语）④This is the new secretary (who/whom/that)I would like to introduce to you. （作宾语）⑤The soldier whose legs were badly wounded was operated on without delay. （作定语）注意：关系代词在定语从句中充当宾语时可以省略，充当主语时则不能。
（见上例③④）（二）关系代词that代替which的一些情况which, that 在代替物时，一般可以通用。
(完整版)英语：译林牛津版高中语法复习大全.doc,推荐文档
英语：译林牛津版高中语法复习大全英语语法复习（模块1-模块4）语法复习一：定语从句（一）定义1)在复合句中（一个句子的某一成分由句子承当），修饰某一名词或代词从句叫定语从句或形容词从句；在句中起定语的作用.2)被定语从句修饰的词叫做先行词antecedent1) The man who lives next to us is a policeman.先行词关系代词定语从句2) You must do everything that I do.先行词关系代词定语从句(二)：关系代词的作用;1.连接主句和从句。
2.代表被修饰的先行词。
3.在定语从句做一个句子成分。
eg. This is the room which I lived in last year.先行词关系代词定语从句(三)：定语从句中有关系代词who, whom, whose, which, that, as.关系副词when, where, why 等引导定语从句。
（四）：用关系代词还是用关系副词关系代词起代词的作用，关系副词起副词的作用，因此同样的先行词，选用什么样的关系词，要由它在定语从句中担任的逻辑作用来决定。
词行先行词充当成分who人主、宾、表关系代词Whom人宾That人&物主、宾、表Which物主、宾、表As物主、宾Whose=of whom\of which人&物定语When=at\in\on\during which时间状Where=at\in\to which地点状关系副词Why=for which原因状that 在口语中可以代替关以上三者状系副词This is the place where we work.（vi.）(关系词所做的成分关键是有从句中的动词来决定的) This is the place which we visited. (vt. )注：先行词是time, minute, moment, next time很少用关系副词when,可用that 但通常省去。
牛津高中英语定语从句
定语从句及相关术语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，所以又称为形容词性从句，一般跟在它所修饰的先行词后面。
在复合句中，修饰某一名词或代词叫做定语从句。
(定语从句的概念:在复合句中,修饰某一名词或代词的从句叫做定语从句.被修饰的名词或代词叫做先行词,定语从句一般放在先行词的后面.关系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, as等，绝对没有what；关系副词有where, when, why等。
关系词常有3个作用：①连接作用，引导定语从句。
②代替主句中的先行词，甚至可能是主句中的一部分或者整个主句。
③在定语从句中充当一句子成分。
注：关系代词有主语、宾语之分。
一般whom作为宾语。
关系代词在从句中作主语，宾语，表语，定语等，关系副词在从句中作地点状语，时间状语，原因状语等。
定语定语用来限定、修饰名词或代词的，是对名词或代词起修饰、限定作用的词、短语（动词不定式短语、动名词短语和分词短语）或句子，汉语中常用‘……的’表示。
主要由形容词担任，此外，名词，代词，数词，分词，副词，不定式以及介词短语也可以来担任，也可以由一个句子来担任。
单词作定语时通常放在它所修饰的词之前，作前置定语。
短语和从句作定语时则放在所修饰的词之后，作后置定语。
先行词被定语从句修饰的名词、代词称为先行词。
如The man The book关系代词引导的定语从句举例关系代词所代替的先行词是人或物的名词或代词，并在从句中充当主语、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这些词代替的先行词是人的名词或代词，who作主语指人，whom作宾语指人，that既可作主语又可作宾语（作宾语可以省略），可以指人也可以指物。
牛津高中英语模块一语法定语从句知识
定语从句知识总结一、一般情况下，限制性定从关系代词的选用：例：1.The man who /that lives next door is friendly.2. Library is a building that/which stores lots of books for readers.3.The girl whom / that /不填 / who you have just seen is from America.4.I like the new computer that /which / 不填 my father bought for me.5.The girl whose hair is red is singing.=The girl of whom the hair is red is singing.6. The book whose cover is blue is mine.= The book of which the color is blue is mine.二. 关系副词的使用：当先行词在从句中做原因状语，用 why=for which; (例 1)当先行词在从句中做地点状语，用 where=at/in/ …+which(根据具体情况选择介词)； (例 2) 当先行词在从句中做时间状语， 用 when=on/during/in/ …+ which(根据具体情况选择介词)； (例 3)例：1. I don’t believe the reason why/for which he was late for school.区别： I don’t believe the reason that/which/ 不填 he gave me. (关系词指物，在从句中做宾语)2. This is the school where/in which I once studied.区别： This is the school which/that/ 不填 I once talked about last month. ( 关系词指物，在从句中 做宾语)3. I will never forget the day when/on which he joined the army.区别： I will never forget the day that/which/ 不填 I spent with him. (关系词指物， 在从句中做 宾语)三. 当关系词在从句中做表语时，通常用 that ，在口语中也可以省去。
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（完整）牛津高中英语语法定语从句.docM1 定语从句：关系代词、介词提前、关系副词、限制性一、基本概念（一）定语从句在复合句中作定语，修饰名词或代词的从句叫定语从句。
（二）先行词被定语从句所修饰的名词或代词。
一般情况下，定语从句紧跟先行词。
但也有因各种原因定语从句与先行词被分割的现象。
（三）关系代词和关系副词定语从句的引导词。
与先行词关系密切，因此紧跟先行词，并在定语从句中充当一个成分。
关系代词有：who, whom, which, that 和whose, 另外，as也可充当关系代词。
关系代词在定语从句中充当主语、宾语、表语和定语。
关系副词有：when, where 和 why。
在定语从句中充当状语。
二、关系代词的用法（一）基本用法根据先行词的不同，和在从句中所充当的成分不同，选用不同的关系代词。
如下表：关系词先行词从句成分例句who 人主语，宾语Do you know the man who is talking with your mother?Mr. Smith is the person with whom I amwhom 人宾语workingThe boy (whom) she loved died in the war.I like those books whose topics are aboutwhose 人，物定语history.The boy whose father works abroad is my关系classmate.代词A plane is a machine that can fly.that 人，物主语，宾语She is the pop star (that) I want to see verymuch.The book (which) I gave you was worth $10.which 物主语，宾语 The picture which was about the accident wasterrible.as 人，物主语，宾语He is such a person as is respected by all of us.This is the same pen as I lost yesterday.备注whom, which 和 that 在从句中做宾语时，常可以省略，但介词提前时后面关系代词不能省略，也不可以用thatas 做宾语一般不省略例如：（注意关系代词在定语从句中所充当的成分）①Do you know the professor who/that will give us a speech next week? （作主语）②I read a report about his new n ovel that/ which will soon be published. （作主语）③ The plan that/which they argued about was settled at last. （作宾语）④ This is the new secretary (who/whom/that) I would like to introduce to you .（作宾语）⑤ The soldier whose legs were badly wounded was operated on without delay.（作定语）注意：关系代词在定语从句中充当宾语时可以省略，充当主语时则不能。
（见上例③④）（二）关系代词that 代替 which 的一些情况which, that在代替物时，一般可以通用。
但在有些情况下，只用that 。
⑴先行词是最高级形容词或它的前面有最高级形容词修饰时。
例如：①This is the best that has been used against pollution .② English is the most difficult subject that you will learn during these years .⑵ 先行词是序数词，或它前面有一个序数词时。
例如：①This is the last place (that) I want to visit .②It is the first American movie of this kind that I ’ve ever seen.⑶先行词是 all, much, little, something, everything, anything, nothing, none 等代词时。
例如：①You should hand in all that you have.②We haven’tgot much that we can offer you .⑷先行词前面有the only, the very, any, few, little, no, all, much, every等修饰时。
例如：①The only thing that we can do is to give you some money.②The little money ( th at) he had was stolen.（三）宜用who, 而不用that 的一些情况⑴先行词是one, ones, anyone时。
例如：①One who has nothing to fear for oneself dares to tell the truth.②Don ’ttell anyone about the news who oughtn’tto know it .⑵先行词是those 时。
例如：① Those who were not fit for their wo rk could not see the beautiful clothes made of the magic cloth.（四）其它情况⑴ 先行词既有人又有物时。
例如：①Do you know the things and persons that they are talking about ?②The bike and its rider that had run over an old man were taken to the police station.⑵主句已有疑问词who 或 which 时。
例如：①Which is the bike that you lost?②Who is the woman that was praised at the meeting?（五）与whose 有关的问题⑴ whose 是代词的所有格，它既可以代人也可以代物。
例如：① I saw a woman whose bag was stolen.② Please show me the book whose cover is red.⑵当 whose 表示物与物的所有格关系时，亦可用of which 的形式。
例如：①The building whose roof you can see from here is a new restaurant.→The building, the roof of which you can see from here, is a new restaurant.或→The building, of which the roof you can see from here is a new restaurant.三、介词前提的问题关系代词在定语从句中充当介词宾语时，介词可以前提至关系代词前。
例如：Have you seen the pen (which) I wrote the note with just now ?（which作介词with的宾语）→Have you seen the pen with which I wrote the note just now ?但是，要注意的是：⑴介词前提后，先行词是人或物，关系代词分别只能用whom 和which ，而不再用that 或 who。
⑵ 介词前提后，关系代词不再能省略。
⑶有些含有介词的短语动词中的介词不能前提，如：look for, look after, take care of 等。
例如：①错误： Who is the old man to that you were talking to ?正确： Who is the old man to whom you were talking ? 或Who is the old man (that/ whom) you were talking to ?②错误： These are the sheepof which the boy took care .正确： These are the sheep(which/that) the boy took care of .四、关系代词在从句中作主语时，从句中的主谓一致关系代词在定语从句中作主语时，从句的谓语动词在人称和数上应与先行词一致。
例如：①Who is the guy that is reading over there?②The number of people that are going to the exhibition is expected to be over 25,000.③All that needs to be done has been done.④He is one of the students who use computer a lot for study .⑤Timmy is the only one of the pupils that has failed the exam.例③中的all 意为“一切” ，作单数。
例⑤中没通过考试的学生事实上只有一人，因此谓语动词也用单数。
that 与 which, who, whom 的用法区别：情况用法说明例句1．先行词为 all, everything, anything, nothing, little, much, 1.H e told me everything that he knows.等不定代词时。
2. All the books that you offered have been 2．先行词被 all, any, every, each, much, little, no, some, given out.few 等修饰时 3. T his is the best film that I have ever read. 只用 that 的情况3．先行词有形容词最高级和序数词修饰时4. We talked about the persons and things4．先行词既指人又指物时that we remembered.5．先行词被 the only, the very 修饰时 5. H e is the only man that I want to see.6．句中已经有who 或which 时，为了避免重复时6. W ho is the man that is making a speech?1．在非限制性定语从句中，只能用which 指代物，用 1. He has a son, who has gone abroad for who/whom 指人further study.只用 which, who, 2．在由“介词 +关系代词”引导的定语从句中，只能用 2. I like the person to whom the teacher is whom 的情况which 指物， whom 指人。