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定语从句解说1．定语从句：复合句中修饰某一名词或代词的从句叫定语从句。
Recently I bought an ancient Chinese vase which was very reasonable.Those who work hard will make progress.2．先行词：被定语从句修饰的词叫先行词。
3．关系词：指引定语从句的词叫关系词。
1）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when, where, why 等。
2）关系词往常有以下三个作用： A 、指引定语从句； B 、取代先行词； C、在定语从句中担当一个The man who is shaking hands with my father is a policeman.该句, who is shaking hands with my father 饰先行词the man，“who”是指引定语从句的关系词，取代先行词the man，在定语从句中作主语。
（二）关系代词指引的定语从句1． who指人，在定语从句中作主语、宾语。
The boys who are playing football are from Class One.Yesterday I helped an old man who had lost his way.昨天我帮助了一位迷路的老人。
成分。
比如：是定语从句，修2． whom指人，在定语从句中做宾语，常可省略。
The professor ( whom ) you are waiting for has come.你正在等的教授已经来了。
The girl ( whom ) the teacher often praises is our monitor.注意：关系代词whom 在口语或非正式文体中常可用who 来取代，也可省略。
定语从句和名词性从句讲解作者：李宏福来源：《新高考·英语基础（高一）》2017年第08期高一语法的定语从句和名词性从句是高中英语教学的重点，也是学生学习的难点，同时又是高考考查的热点。
纵观近年各地高考试题，对两大从句的考查不是单纯考查其语法结构，而是把它融入到一定的语境中，考查学生的实际综合运用能力。
本文试图分析这两大从句的常见考点，帮助学生在学习中总结应对的策略。
一、定语从句的考点1.关系代词的用法（1）关系代词that和which的用法that和which在限制性定语从句中都可以做主语、表语或宾语，先行词均指物；做宾语时，均可省略。
在通常情况下，可以互换使用，但是that不能引导非限制性定语从句，which 可以引导非限制性定语从句。
命题角度主要以that与which指物时的区别为重点进行命制。
【例题】①You can borrow any book________you want to read in our school library.A.whichB.thatC.whoD.where【解析】答案是B。
先行词被all，every，no，some，any，（a）few，（a）little，much 等限定词修饰时，用that引导，不用which。
②The president of the World Bank says he has a passion for China，________he remembers starting as early as his childhood.A.whereB.whichC.thatD.when【解析】答案是B。
此处为非限制性定语从句，先行词是a passion，并在定语从句中做starting的宾语，that不能引导非限制性定语从句。
（2）关系代词as的用法关系代词as引导限制性定语从句时既可指人又可指物，只能替代由such，the same等修饰的先行词；as引导非限制性定语从句时，可放于句首，句中或置于句尾，而which则只能置于主句之后。
高一英语必修一：定语从句讲义定语及定语从句一、定语句子中修饰名词或代词的成分叫做定语。
定语可以由形容词，名词，不定式，分词，动名词或从句来充当。
eg: She is a beautiful girl. （形容词）I met someone funny on my way to Beijing. （形容词）（修饰不定代词的定语后置）He is an English teacher. （名词）（名词作定语时一般用单数，例外的有sports, 如 a sports star）I have a lot of work to do. （不定式）The book written by a schoolboy is very popular now. （过去分词短语）We can see the rising sun. （现在分词） = the sun is rising.He is in the reading room. (动名词) = the room for readingThe boy who broke the window is Tom’s brother. （从句）注意：1.形容词作定语一般放在中心名词前面；但当形容词修饰的是不定代词时，要后置。
present (在场的), absent (缺席的)作定语时需要后置。
students present / absent2. 不定式做定语通常要放在被修饰的词后。
3 分词作定语时，即可放在所修饰词前，也可放在所修饰词后1）分词前置：单独的一个分词作定语，一般放在所修饰词前。
He is a retired worker.他是位退休的工人2）分词后置：在以下情况，分词放在所修饰词的后面i. 分词词组； There was a girl sitting there.有个女孩坐在那里ii. 个别分词如given, left；This is the question given.这是所给的问题iii. 修饰不定代词时There is nothing interesting.没有有趣的东西过去分词作定语与其修饰的词是被动关系，相当于一个被动语态的定语从句，表被动或已完成。
20仃高一英语定语从句讲解定语从句讲解 1．定语从句：复合句中修饰某一名词或代词的从句叫定语从 句。
Recently I bought an ancient Chinese vase which was very reasonable. Those who work har 2． 3． 1 w 代 h 替 e 2n )先, 关w 行h 系词er 词；e,通 w C 常h 、y 有在等下定。
列语三从句中担当一个成分。
例如： The man who is shaking hands with my father is a po n 修. 饰 该先句行, 词who th is e m sh a a n k ，ing “ ha w n h d o ”s 是 w 引ith 导 m 定y 语fa 从the 句r 的是关定系语词从 修饰先行词 the man 在，定定“语语w 从从h 句o 句”是中引作导主定语语从句的关系词 的饰ill词的ma词叫 ogress . 词。
hose w tha )t 关先, w 关系行h 系i 词词ch 词：：, 有w 被引h 关导定o,系 定语w 代h 从语om, whose, as that, which, who, whom, whose, as 三个作用： 三从个句作中用担： 。
等关； 系词副有词有 引分导定语 句； B 、 替先行词 (二)关 1． who 指人，The boys who are playing football are 的 a 老n o 人ld 。
主语、宾语。
from Class One. man who had lost his way.a 昨天 ，路在的定老语人从句中做宾语，常可省略。
you are waiting for has come. whom ) the tea ，也系可代省词略。
w 但ho 直m接介词后只用 whom, 不可省略。
高中定语从句详细讲解一、什么是定语从句？定语从句是修饰名词或代词的从句，用来对名词或代词进行进一步的说明或限制。
它通常由关系代词或关系副词引导。
二、关系代词引导的定语从句1. 引导关系代词有：that, which, who, whom, whose, as, when, where等。
例句1：The book that I borrowed from the library is very interesting.这本书是我从图书馆借来的，非常有趣。
例句2：The girl who is sitting next to me is my best friend.坐在我旁边的那个女孩是我最好的朋友。
例句3：I don't know the reason why he didn't come to the party.我不知道他为什么没来参加派对的原因。
三、关系副词引导的定语从句1. 引导关系副词有：when, where, why, how等。
例句4：This is the school where I studied last year.这是我去年学习的学校。
例句5：I will never forget the day when we met for the first time.我永远不会忘记我们第一次见面的那一天。
四、关系代词和关系副词的用法区别1. 关系代词在定语从句中充当主语或宾语，而关系副词则在定语从句中充当状语。
例句6：The girl who/that is standing there is my sister.（关系代词作主语）站在那里的那个女孩是我的妹妹。
例句7：I still remember the day when/that we went on a trip together.（关系副词作状语）我仍然记得我们一起去旅行的那一天。
五、关系代词的省略1. 当定语从句的关系代词在从句中作宾语，并且在主句中有明确的宾语时，可以省略关系代词。
定语从句讲解(完整版)定语从句是一种常见的语法结构，用于对名词或代词进行修饰和限定。
在英语中，定语从句的使用可以使句子更加丰富和准确。
下面，我将为您详细讲解定语从句的构成、用法和注意事项。
一、定语从句的构成定语从句由引导词、关系词和从句组成。
引导词通常是先行词，即被修饰的名词或代词；关系词用于引导定语从句，并将先行词与从句连接起来；从句则是对先行词进行修饰和限定的部分。
1. 引导词：先行词通常是名词或代词，它可以是主语、宾语或表语。
例如：The book that you gave me is very interesting.（你给我的那本书很有趣。
）The man who is talking to the teacher is my father.（正在和老师交谈的那个人是我的父亲。
）2. 关系词：关系词用于引导定语从句，并将先行词与从句连接起来。
关系词有who、which、that、whom、whose等。
例如： The book that you gave me is very interesting.（你给我的那本书很有趣。
）The man who is talking to the teacher is my father.（正在和老师交谈的那个人是我的父亲。
）3. 从句：从句是对先行词进行修饰和限定的部分。
从句中通常包含主语、谓语和宾语等成分。
例如：那本书很有趣。
）The man who is talking to the teacher is my father.（正在和老师交谈的那个人是我的父亲。
）二、定语从句的用法1. 限定性定语从句：限定性定语从句对先行词起到限定作用，即只有满足定语从句条件的名词或代词才是先行词的准确含义。
限定性定语从句通常紧跟在先行词之后，且不能用逗号与主句隔开。
例如： The book that you gave me is very interesting.（你给我的那本书很有趣。
[高中英语语法] 定语从句一、定义及相关术语1．定语从句：修饰某一名词或代词的从句叫定语从句。
定语从句一般紧跟在它所修饰的先行词之后。
2．先行词：被定语从句修饰的词叫先行词。
3．关系词：引导定语从句的词叫关系词。
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；关系副词有when, where, why等。
关系词通常有下列三个作用：A、引导定语从句；B、代替先行词；C 、在定语从句中担当一个成分。
例如：The man who is shaking hands with my father is a policeman.该句中，who is shaking hands with my father 是定语从句，修饰先行词the man，“who”是引导定语从句的关系词，代替先行词the man，在定语从句中作主语。
二、定语从句的种类以及区别定语从句分为限制性定语从句和非限制性定语从句，现将它们之间的用法及区别列表如下限制性定语从句非限制性定语从句和先行词的关系密切（删去后，影响整个句子意义的表达）和先行词的关系不密切（是一种补充说明，删去后不影响整个句子意义的表达）不用逗号分开一般使用逗号分开可用关系代词that引导不可用关系代词that引导可以省略（that，who，which在从句中担当宾语时可以省略）不可以省略可以替代（whom作宾语时，可用who或that替代）不能替代只可以修饰先行词，不可以修饰主句或主句的一部分修饰整个主句或主句的一部分，此时定语从句前有逗号分开，只能用which或as引导。
请看下面例句的不同含义：限制性：她有两个当解放军的儿子。
She has two sons who are P.L.A.men.(Maybe she has other sons who are not P.L.A.men.)非限制性：她有两个儿子，他们都是解放军。
定语从句讲解1．定语从句：复合句中修饰某一名词或代词的从句叫定语从句。
Recently I bought an ancient Chinese vase which was very reasonable.Those who work hard will make progress.2．先行词：被定语从句修饰的词叫先行词。
3．关系词：引导定语从句的词叫关系词。
1）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when, where, why等。
2）关系词通常有下列三个作用：A、引导定语从句；B、代替先行词；C、在定语从句中担当一个成分。
例如： The man who is shaking hands with my father is a policeman. 该句, who is shaking hands with my father 是定语从句，修饰先行词the man，“who”是引导定语从句的关系词，代替先行词the man，在定语从句中作主语。
（二）关系代词引导的定语从句1．who 指人，在定语从句中作主语、宾语。
The boys who are playing football are from Class One.Yesterday I helped an old man who had lost his way. 昨天我帮助了一位迷路的老人。
2．whom 指人，在定语从句中做宾语，常可省略。
The professor ( whom ) you are waiting for has come. 你正在等的教授已经来了。
The girl ( whom ) the teacher often praises is our monitor. 注意：关系代词whom 在口语或非正式文体中常可用who 来代替，也可省略。
但直接介词后只用whom,不可省略。
The man ( whom / who )you met just now is my old friend.The man to whom you talked just now is my old friend.（whom不可省略）3．which 指物，在定语从句中做主语或宾语，做宾语时常可省略。
或在非限制定语从句中代替整个主句。
Football is a game which is liked by most boys.This is the pen ( which ) he bought yesterday.He failed the exam again ,which made his father angry.4．that 指人时，相当于who 或whom；指物时，相当于which.。
在定语从句中作主语或宾语，作宾语时常可省略。
The number of people that / who come to visit this city each year reaches one million.Where is the man (that / whom) I saw this morning? 我今天早上看到的那个人在哪儿？Yesterday I received a letter that / which came from Australia.5．whose 通常指人，也可指物，在定语从句中做定语。
I visited a scientist whose name is known all over the country. 我拜访了一个全国知名的科学家。
I once lived in the house whose roof has fallen in. 我曾经住在那幢屋顶已经倒塌了的房子里。
注意：指物时，常用下列结构来代替：We live in a house,__________ windows face the sea.We live in a house,___________ the windows face the sea.We live in a house, the windows__________ face the seaWe live in a beautiful house, and the windows _________ face the seaDo you like the book whose cover is yellow?=_____________________=_________________（三）“介词+关系代词”引导的定语从句关系代词在定语从句中作介词宾语时，从句常常由“介词+关系代词”引出。
The school (which / that) he once studied in is very famous.=The school in which he once studied is very famous. 他曾经就读过的学校很出名。
This is the boy (whom / who / that) I played tennis with yesterday.=This is the boy with whom I played tennis yesterday. 这是我昨天跟他打台球的男孩。
The manager whose company I work in pays much attention to improving our working conditions.=The manager in whose company I work pays much attention to improving our working conditions.注意：１．含有介词的短语动词一般不拆开，介词仍放在短语动词的后面。
如：look for, look after, take care of 等。
This is the watch (which / that) I am looking for. (正) 这是我正在找的手表。
This is the watch for which I am looking . (误)The babies (whom / who / that) the nurse is looking after are very healthy. (正)The babies after whom the nurse is looking are very healthy. （误）２．若介词放在关系代词前，关系代词指人时只可用whom，不可用who, that；关系代词指物时只可用which，不可用that。
关系代词是所有格时用whose。
The man with whom you talked just now is my neighbour. (正)The man with that / who you talked just now is my neighbour. (误)The plane in which we flew to Canada was really comfortable. (正)The plane in that we flew to Canada was really comfortable. (误)３．“介词+关系代词”前还可有some, any, none, all, both, neither, many, most, each, few等代词或者数词。
如：He loves 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.Up to now, he has written ten stories, three of which are about country life.（四）关系副词引导的定语从句1． when 指时间，在定语从句中作时间状语。
I still remember the day when=(…) I first came to this school.The time when we got together finally arrived. 我们团聚的时刻终于到了。
2． where 指地点，在定语从句中作地点状语。
Shanghai is the city where I was born. 上海是我出生的城市。
The house where=(…) I lived ten years ago has been pulled down.I visited the farm where=(…) a lot of cows were raised .3． why 指原因，在定语从句中作原因状语。
Please tell me the reason why=(…) you missed the plane. 请告诉我你误机的原因。
I don’t know the reason why he looks unhappy today. 我不知道他今天为什么看上去不愉快。
注意：关系副词引导的定语从句经常可以用“介词+关系代词”引导的定语从句来表示。
如：Great changes are taking place in the city where / in which they live.The reason why / for which he refused the invitation is quite clear.（五）限制性定语从句和非限制性定语从句限制性定语从句形式上：不用逗号“，”与主句隔开。
意义上：是先行词不可缺少的定语，如删除，主句则失去意义或意思表达不完整。
译法上：译成先行词的定语：“．．．的”关系词的使用上：A．作宾语时可省略 B．可用that C．可用who 代替whom非限制性定语从句形式上：用逗号“，”与主句隔开。
意义上：只是对先行词的补充说明，如删除，主句仍能表达完整的意思。
译法上：通常译成主句的并列句。
关系词的使用上：A．不可省略 B．不用that C．不可用who 代替whom限制性定语从句举例：The teacher told me that Tom was the person (that/who/whom)I could depend on.China is a country which/that has a long history. 中国是一个历史悠久的国家。
