关于定语从句.想请问定语从句里作为先行词that和which有什么不同?另外,都在代表人的时候,什么时候用who什么时候

who, whom, that
这些词代替的先行词是人的名词或代词,who做主语指人,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.在从句中所起作用如下： (1) Is he the man who/that wants to see you? 他就是想见你的人吗?（who/that在从句中作主语） (2) He is the man whom/ that I saw yesterday. 他就是我昨天见的那个人.（whom/that在从句中作宾语）
Whose 用来指人或物
(只用作定语, 若指物,它还可以同of which互换,指人的时候也可以用of whom 代替） (1) They rushed over to help the man whose car had broken down. 那人车坏了,大家都跑过去帮忙. (2) Please pass me the book whose (of which) color is green. 请递给我那本绿皮的书.
which, that
它们所代替的先行词是事物的名词或代词,在从句中可作主语、宾语等,作宾语时可以省略,例如： (1) A prosperity which / that had never been seen before appears in the countryside. 农村出现了前所未有的繁荣.（which / that在句中作主语） (2) The package (which / that) you are carrying is about to come unwrapped. 你拿那个包裹快要散开了.(which / that在句中作宾语） 4、 as as 可以做主语,也可以作宾语,作宾语时可以省略,指人或者物.常与such as,the same as等短语连用.
编辑本段限定性定语从句
关系代词
关系代词：在句中作主语、宾语或定语 1. that既可代表事物也可代表人,which代表事物；它们在从句中作主语或宾语,that在从句中作宾语时常可省略关系词,which在从句中作宾语也可以省略.[eg：This is the book （which）you want.] 2. 如果which在从句中作“不及物动词＋介词”的介词的宾语,注意介词不要丢掉,而且介词总是放在关系代词which的前边,但有的则放在它原来的位置 3. 代表物时多用which,但在下列情况中用that而不用which： a)先行词是anything, everything, nothing , none等不定代词时； b)先行词由every, any, all, some, no, little, few, much等修饰时,这时的that常被省略； c)先行词前有序数词或被形容词最高级修饰时； d)先行词中既有人又有物时； e)整个句中前面已有which,who,that时； f)当先行词为物并作表语时； g)先行词为one时； h)先行词同时又被the only,the very,the same修饰时； 4. who和whom引导的从句用来修饰人,分别作从句中的主语和宾语,whom作宾语时,要注意它可以作动词的宾语也可以作介词的宾语 5. whose是关系代词,修饰名词作定语,相当于所修饰成分的前置所有格.它引导的从句可以修饰人和物, 当它引导的从句修饰物体时, 可以与 of which 调换,表达的意思一样.
关系副词
关系副词：在句中作状语 关系副词=介词+关系代词 why=for which where=in/ at/ on/ ... which (介词同先行词搭配) when=during/ on/ in/ ... which (介词同先行词搭配) 1. where是关系副词,用来表示地点的定语从句. 2. when引导定语从句表示时间〔注〕值得一提的是,表示时间“time"一词的定语从句只用when引导,有时不用任何关系代词,当然也不用that引导. By the time you arrived in London, we had stayed there for two weeks. 到你到达伦敦的时候,我们在那里已经待了两个星期. I still remember the first time I met her. 我仍然记得我第一次见到她. Each time he goes to business trip, he brings a lot of living necessities, such as towels, soap, toothbrush etc. 每一次他去出差,他带来了生活必需品,如毛巾,肥皂,牙刷等,很多. 3. 当从句的逻辑主语是some, any, no, somebody, anybody, nobody, something, anything, everything或nothing时,常用there is来引导 There is somebody here who wants to speak to you. 这里有人要和你说话.
编辑本段非限制性定语从句
非限制性定语从句的作用是对所修饰的成分作进一步说明,通常是引导词和先行词之间用逗号隔开,将从句拿掉后其他部分仍可成立 1. which引导的非限制性定语从句来说明前面整个句子的情况或主句的某一部分 2.当先行词是专有名词或物主代词和指示代词所修饰时,其后的定语从句通常是非限制性的,例如： Charles Smith, who was my former teacher, retired last year. 查理·史密斯去年退休了,他曾经是我的老师. My house, which I bought last year, has got a lovely garden. 我去年买的的那幢房子带着个漂亮的花园. This novel, which I have read three times, is very touching. 这本小说很动人,我已经读了三遍. 3.非限制性定语从句还能将整个主句作为先行词, 对其进行修饰, 这时从句谓语动词要用第三人称单数,例如： He seems not to have grasped what I meant, which greatly upsets me. 他似乎没抓住我的意思,这使我心烦. Liquid water changes to vapor, which is called evaporation. 液态水变为蒸汽,这就叫做蒸发. 4. 有时as也可用作关系代词 5. 在非限定性定语从句中,不能用关系副词why和关系代词that,而用who, whom代表人,用which,whose代表事物,如果需要用why, 可用for which代替.； p.s: which引导非限制性定语从句其后不可省略成分,as可以
编辑本段关系代词引导的定语从句
who指人在从句中做主语
(1) The boys who are playing football are from Class One. 在踢足球的男孩们是一班的. (2) Yesterday I helped an old man who lost his way. 昨天,我帮助了一个迷路的老人.
whom指人
在定语从句中充当宾语,常省略.（注：who和whom已无太大区别,基本可以通用.区别是who可以做主语而whom不可以,whom前可以加介词如to whom,但是who不可以） (1) Mr. Liu is the person (whom) you talked with on the bus. 刘先生就是在公交车上和你聊天的那个人. (2) Mr. Ling is just the boy(whom)I want to see. 凌先生恰巧就是我想见的那个男孩. (3) The man who/whom you met just now is my friend. 你刚刚见到的那个人就是我的朋友. 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. 如果在从句中做宾语,就用whom或who.比如: He is the man whom/who I talk to. 他就是那个和我聊天的男人. 如果是在从句中作主语就只能用who.比如: He is the man who has an English book. 他就是那个有英语书的男人.
whose通常指人也可指物
在定语从句中做定语. (1) He has a friend whose father is a doctor. 他有一个朋友的父亲是医生. (2) I once lived in a house whose roof has fallen in. whoes指物时通常以以下结构来代替 (3) The classroom whose door is broken will soon be repaired.那个门被打破的教室不久会被修复. (4) The classroom the door of which is broken will soon be repaired.课堂门,被打破会不久被修复. (5) Do you like the book whose color is yellow?你喜欢颜色是黄色的书吗? (6) Do you like the book the color of which is yellow?你喜欢的书的颜色,是黄色吗? which指物 在定语从句中做主语,表语,定语或者宾语,做宾语时可省略. (1) Football is a game which is liked by most boys. 足球是大多数男孩都喜欢的游戏. (2) This is the pen (which) he bought yesterday. 这是他昨天刚买的钢笔.
that指人时
相当于who或者whom；指物时,相当于which. 在定语从句中做主语,表语或者宾语,做宾语时可省略. (5) The number of the people that/who come to visit the city each year rises one million.数目的人民那个/谁来城市观光每年上升之一个百万 (6) Where is the man that/whom I saw this morning?那个男人在哪里/我看见谁了今天早上?
编辑本段关系副词引导的定语从句
when指时间
在定语从句中做时间状语也可做连接词用 (1) I still remember the day when I first came to the school. (2) The time when we got together finally came.
where指地点
在定语从句中做地点状语 (1) Shanghai is the city where I was born. (2) The house where I lived ten years ago has been pulled down.
why指原因
在定语从句中做原因状语 (1) Please tell me the reason why you missed the plane. (2) I don’t know the reason why he looks unhappy today. 注意：关系副词引导的从句可以由“介词+关系代词”引导的从句替换 (1) The reason why/ for which he refused the invitation is not clear, (2) From the year when/in which he was going to school he began to know what he wanted when he grew up.
关系代词（一般情况下）that 可用who ,whom 和which在从句做主语,谓动词的宾语,但是不能做介词的宾语. which指物,在从句中作主语,谓语或宾语； who在从句中作主语； whom在从句中作宾语； where在从句中修饰表地点的名词,做地点状语； when在从句中通常修饰表时间的名词,做时间状语； why在从句中做原因状语,先行词通常是"reason" 有时why也可用for+which代替.