精选-定语从句中关系代词that的特殊用法
定语从句关系代词只用that的四种情况
定语从句关系代词只用that的四种情况定语从句是英语句子的一种形式，用来描述或定义名词。
关系代词在定语从句中充当连接词，将定语从句引入主句中，起到结构完整化的作用。
在定语从句中，关系代词的种类有很多，其中较为特殊的是只用“that”的情况，本文将详细介绍这种情况下的用法及注意点。
一、定义关系代词”that“是用来连接定语从句和主句的重要连词，在英语中十分常见。
它的形式既可以作主语也可以作宾语，常用于定语从句中，引导一个话题在从句中被进一步解释。
二、使用情况在英语定语从句中，that只有在严格的语法环境中词法才是唯一的选择，情况包括以下四种。
1.介词之后：当先行词是介词时，关系代词只能用that。
例如，“the book that I am reading”中的that是引导定语从句的关系代词。
假如在这个句子中，你用which来代替that，那么这个从句仍然可以理解，但这样使用是错误的。
正确：The book that I am reading.错误：The book which I am reading.2.形容词之后：如果形容词修饰名词，其中包含有定语从句，而先行词又在从句里作宾语，就必须使用that。
例如，“This is the man that I saw on TV yesterday”。
正确：This is the man that I saw on TV yesterday.错误：This is the man which I saw on TV yesterday.3.最高级别形容词之后：当最高级别形容词修饰的名词在定语从句中作先行词时，只能用that，而不用which或者who。
例如，“This is the best d ay that I've ever had in my life”。
正确：This is the best day that I've ever hadin my life.错误：This is the best day which I've ever had in my life.4.不定代词之后：不定代词（如something，anything，nothing，everyone，everybody等）以及不定副词（如somewhere，anywhere，nowhere等）后面的定语从句，只能用that。
定语从句that和where用法
定语从句的应用及that和where用法定语从句在英语中扮演着非常重要的角色，它通过对主句进行修饰、补充或限定，让整个句子更具丰富性和表达力。
在定语从句的构成中，常用的引导词包括关系代词that、which，以及关系副词where、when等。
本文将重点探讨定语从句中特别常见的that 和where的应用。
使用that引导的定语从句1. 作为主语或宾语 - The book that I bought yesterday is very interesting. - She is the person that I admire most.2. 作为先行词为物的定语从句 - The house that Jack built is now for sale. - Here is the pen that you were looking for.3. 用于指代人或物 - The film that we watched last night was amazing. - The friend that helped me when I was in trouble is very kind.4. 用于非限制性定语从句 - My dog, that is a Labrador, loves to play in the park. - The hotel, that we stayed at last summer, had a beautiful view.使用where引导的定语从句1. 表示地点 - I still remember the place where we first met. - This is the town where I grew up.2. 表示特定场所 - The library where I study is very quiet. - Do you remember the restaurant where we had dinner last week?3. 表示方位，有时还可用于时间状语从句 - The room where my parents sleep faces the garden. - I will never forget the day where we won the championship.4. 在介词后，表示地点 - This is the house where she lived in for many years. - Can you show me the park where you usually go jogging?定语从句的使用能丰富句子结构，使语言表达更加清晰明了。
定语从句中关系代词的特殊用法
定语从句中关系代词的特殊用法定语从句是英语中常见的一个句法结构，用来修饰名词或代词，进一步描述或限定其意义。
在定语从句中，关系代词起着连接主句和从句的作用。
除了常见的用法外，关系代词还有一些特殊的用法。
本文将对关系代词在定语从句中的这些特殊用法进行详细介绍。
1. 关系代词 "that" 的特殊用法关系代词 "that" 在定语从句中有一些特殊的用法。
首先，当先行词是不定代词，如 "everything"、"something"、"nothing" 等，或者是序数词、最高级形容词时，我们可以使用 "that" 来引导定语从句。
例如：- Is there anything that I can do for you?- This is the best gift that I have ever received.另外，当先行词被 "all", "any", "much", "little", "no" 等词修饰时，我们也可以使用 "that" 来引导定语从句。
例如：- He ate all the cakes that were on the table.- Do you have any books that I can borrow?2. 关系代词 "which" 和 "whom" 的特殊用法关系代词 "which" 和 "whom" 在定语从句中也有一些特殊的用法。
首先，当先行词是表示人的名词，并在定语从句中作宾语时，我们可以使用 "whom" 来引导定语从句。
that在从句中的用法
that在从句中的用法在英语中，"that"是一个常用的代词，可以在从句中作为主语、宾语、表语或同位语使用，表示特定的事物或概念。
以下是一些常见的"that"在从句中的用法：1. 主语从句：在主语从句中，"that"常被省略，但如果引导的主语太长或与主句的主语不同，通常会保留"that"。
例如：“That (that) he is a good teacher is clear.”2. 宾语从句：在宾语从句中，"that"可以省略，尤其是在某些动词（如"think"，"believe"等）后。
例如：“I believe (that) she will succeed.”3. 表语从句：在表语从句中，"that"通常不省略。
例如：“The reason why he was late was that he missed the bus.”4. 同位语从句：在同位语从句中，"that"不作任何成分，因此通常省略。
例如：“The news that he won the prize was exciting.”5. 关系代词：在定语从句中，"that"作为关系代词，可以指人或物，代替先行词在从句中充当成分。
例如：“The book that I read was very interesting.”6. 强调结构：在强调结构中，"that"用于强调某个特定的部分。
例如：“It was she that (that) found the lost child.”需要注意的是，"that"在从句中的用法可能会因为语境、习惯或避免重复而有所不同。
因此，在实际使用中，需要根据上下文和语法规则来判断是否省略"that"。
定语从句that 的用法
定语从句that 的用法一、什么是定语从句定语从句是指在一个句子中用来修饰名词或代词的从句。
而连接这个从句和主句的词就是关系副词that。
定语从句起到限制或说明名词或代词的作用，对于增强语境的描述和信息的详细化有重要作用。
二、that 的用法1. 作为关系代词使用在定语从句中，that 可以指代人和物，并可用来替代所有格形式。
例：This is the book that I borrowed from the library.2. 作为引导词在某些情况下，that 不仅可以作为关系代词使用，还可以作为引导词引导定语从句。
例：It is important that we take care of the environment.三、that 引导定语从句的具体用法1. 修饰人的关系从句当定语从句修饰人时，即修饰先行词为人时，通常使用关系代词who 或者that。
例1：He is the man who/that helped me yesterday.例2：The woman that I met this morning was very kind.需要注意的是，在口头交流中，很多时候我们会省略掉关系代词who 或者that。
如：- He is the man I met yesterday.- The woman I talked to was very kind.2. 修饰物的关系从句当定语从句修饰物时，即修饰先行词为物时，我们通常使用关系代词that。
例1：The car that I bought is very expensive.例2：I don't like the dress that she is wearing.需要注意的是，在修饰物时，我们一般不用关系代词 which。
因此，以下两个句子中的第二个从句都是错误的。
- The book, which I read last night, was very interesting.- The watch, which he gave me as a gift, is beautiful.正确的表达应该是：- The book that I read last night was very interesting.- The watch that he gave me as a gift is beautiful.3. 修饰整个主语或宾语从句在有些情况下，定语从句可以用来修饰整个主语或宾语从句。
that用于定语从句
that用于定语从句一、that在定语从句中的用法1. 先行词为物时- 在定语从句中，如果先行词是物，that可以充当关系代词引导定语从句，在从句中可作主语、宾语等成分。
- 例如：The book that I bought yesterday is very interesting.（先行词the book是物，that在从句I bought yesterday中作宾语）- 当先行词被形容词最高级、序数词或者the only, the very, the same等修饰时，关系代词通常用that。
- 例如：This is the best movie that I have ever seen.（先行词movie被the best修饰，关系代词用that）；He is the first person that I met here.（先行词person被the first修饰，关系代词用that）；This is the very book that I want.（先行词book被the very修饰，关系代词用that）2. 先行词为人时- 先行词为人时，that也可以引导定语从句，在从句中作主语或宾语。
- 例如：The man that is standing there is my father.（先行词the man是人，that在从句is standing there中作主语）；The girl that I like is very kind.（先行词the girl是人，that在从句I like中作宾语）- 当先行词既有人又有物时，关系代词只能用that。
- 例如：I can remember the persons and things that I saw in the village.（先行词persons and things既有“人”又有“物”，关系代词用that）3. that在从句中作宾语时的省略情况- 当that在定语从句中作宾语时，在口语和非正式文体中常常可以省略。
浅谈that和which在定语从句中的特殊用法
浅谈that和which在定语从句中的特殊用法在定语从句中，that和which都可指代事物，一般可以互换使用，但并非在任何情况下都是这样。
现在就它们的特殊用法分别谈一谈。
㈠只用that,不用which⒈当先行词为all,little,much,few,none,some,something,anything,nothing,everything,theone等代词时⑴We should do all that is useful to the people.我们应该做一切有益于人民的事情。
⑵We haven’t got much that we can offer you.能够向你提供的东西，我们没有许多。
⑶I mean the one that was bought yesterday.我指的是昨天买的那个。
⑷Nothing that he talked about can be seen now.他所谈及的任何事现在都已不复存在了。
⑸She has got many books and wants to lend a few that are of great value to me.她有许多书，并想借几本很有价值的书让我读一读。
⒉先行词前有only,any,few,little,no,all,some,one of,much,every,very,last,same,right等修饰语时⑴The only thing that we could do was to ask the police station for help.我们唯一能够做的事是向派出所请求援助。
⑵You can take any seat that is free.任何空着的座位你都可以坐。
⑶There is little time that we can spare.我们没有什么时间可以抽出来。
⑷This is one of the presents that my friends gave me on my birthday.这是我生日那天朋友们给我的礼物之一。
定语从句中的that
定语从句中的that定语从句中的that定语从句中的that我们知道，定语从句由关系代词和关系副词引导。
that就是其中一个特殊的关系代词。
that既指人又指物，在定语从句中，作为关系代词有的时候可以和which和who互换。
但是一些特殊的情况只能用that。
那么我们来看一下这些特殊情况：1、当先行词是不定代词all, much, little, something, everything, anything, nothing, none等时。
●You should hand in all that you have.你应该上交你所有的东西。
●Do you have anything that you want to say for yourself ?你有要为自己说的吗？●Jim did everything that could improve her grades.吉姆做所有可以提高的事。
2、当先行词被the only, the very, any, few, little, no, all等词修饰时。
●Singing is the only thing that interests Alice most.唱歌是唯一丽丝感兴趣的事。
●This is the very person that Im waiting for.这正是我要等的那个人。
●The only thing that we can do is to give you some advice.我们唯一能做的就是给你一些建议。
3、当先行词是形容词最高级或先行词的前面有形容词最高级修饰时。
●This is the best way that has been used against pollution.这是应对污染的最好方式。
●This is the most interesting film that I’ve ever seen.这是我看过的最有趣的电影。
定语从句关系代词that和which的用法与区别
定语从句关系代词that 和which 的用法与区别that 和which在定语从句中都是做关系代词，指代先行词是事物的名词或代词（that还可以指代人，which 不可以）。
通常情况下二者可以互换。
区别：关系代词用that（不用which）的情况：1. 先行词是all, anything, everything, nothing等,关系代词应用thatThat's all that he told me.2.先行词前有the only, the same, the very 或no, little, much, any, every, all 等修饰时,关系代词应用thatShe is the only person that I know in this company.3. 先行词前有序数词或形容词最高级修饰时,关系代词常用thatThe first thing that I want to do is to take it away.4. 当先行词同时含有"人"或"物"时,关系代词应用that5. 在固定结构the same...that...; so...that...; such...that...以及it is/was...that...的强调句型中,要用thatThis is the same park that we once visited.6. 如主句以there be开头时,关系代词应用thatThere is a room that has two windows.关系代词用which（不用that）的情况：1. 非限制性定语从句中关系代词一般要用whichShe won the competition, which made the whole family very happy.2. 关系代词前如有介词,关系代词须用 which; 如把介词移至句末,可用that(或省略)There’s only one problem about which they disagree.This is the key (that) she was looking for.3. 如果先行词是that,关系代词应用 whichI know that which you told me.4. 如先行词和定语从句之间被其它较长的成分分隔,常用whichLarry told her the story of the young airman which I narrated at the beginning of this book. (先行词为story)5. 在"those+复数形式的名词"结构中,其后的关系代词多用whichA shop should keep a stock of those goods which sell best.6. 一个句子中如有两个定语从句,第一个定语从句用了关系代词that,第二个从句中的关系代词宜用which;但在平行结构中,应重复同一个关系代词This is the book that you bought which you have lost.。
THAT用法总结
THAT用法总结第一、that 用作形容词(后接复数名词时用those)它用来指已被提到的人或物；也可表对比，指两个中较远的那个。
What about that book you borrowed from me last month？请注意，that 有时候在句子中具有喜欢或轻蔑等感情色彩。
that little son of his 他那个小宝贝儿子That George！乔治那家伙！（含有轻蔑语气）第二、that 用作代词。
1. that 用作指示代词(复数形式是those），其指代意义同形容词用法，同时它还可以用作定语从句中的先行词；还可为了避免重复,代替前述名词。
.that用来替代前面提到的特指的事物，所代替的名词可以是可数名词，也可以是不可数名词。
代替可数名词可以用the one替换.但其前面不可用任何限定词修饰。
例如:1)The population of China is larger than that of Japan.（that代替不可数名词population,不可用the one替换）2)The headteacher in your class is younger and more active than that in theirs。
（that 代替可数名词headteacher,可用the one替换）that 代替指物的单数可数名词或抽象不可数名词，一般是特指的those 代替指人或指物的复数名词,一般是特指的=the onesone 代替指人或指物的单数可数名词，一般是泛指的ones 代替指人或指物的复数名词，一般是泛指的That is what he told me。
What is that （which) you have got in your hand？The price of rice is higher than that of flour.2。
定语从句中that_与who一些特殊用法
You should hand in all that you have.
6,先行词前面有only,any,few,little,no,all,one of,the same,the very等词修饰时。
Those who want to go to the Great Wall sign up here.
3，先行词有较长的后置定语时，宜用who。
I met a foreign in the street yesterday who could ask me question in chinese.
2,先行词是序数词，或它前面有一个序数词时。 3，主句有疑问词who或which时。
Which is the biLeabharlann e that you lost ?
4，先行词有人又有物时，宜用that。
The bike and its rider that had run over an old man were taken to police station.
Li Ming is the only one that wants to be a teacher .
7,有两个定语从句，其中一个关系代词已用 which，另一个宜用that。
Edison bulit up a factory which produced things that had never been seen before.
二、先行词指物，用that不宜用which的情况。
1，先行词是形容词最高级或它的前面有形容词最高级 时。
定语从句中关系代词that的用法
1)在既指人又指事物的两个或两个以上的先行词后面。
例如：They are talking about the people and countries that they had visited.2)在限制性定语从句中有形容词最高级的先行词后面。
例如：He is the best student that I have ever met.3)在以“It is...”,“It was...”等开头的强调句中，和相应的疑问句中。
如：What is it that he wants?4)在only, all, little的后面This is all that I know.5)在no, every, some和any等词后面，也包括在它们的复合词在内。
如：There is no person that is always in the right.Is there anything that I can do for you?近义词辨析beautiful, good looking, handsome, lovely, pretty这组词均含有“美丽”、“漂亮”、“可爱”的意思。
beautiful指能不仅给人带来感官上的快乐，而且通过感官产生思想和灵魂的愉悦，在同类词中层次最高。
She was even more beautiful than I had remembered.她比我记忆中的她更漂亮了。
good looking不如handsome, pretty意思强烈，指一般的“好看”或“悦目”。
That good looking young man visited the house once or twice a week.那个长相不错的年轻人一星期光顾一两次。
handsome通常是一种客观的不带感情色彩的评价。
一个人如被形容为handsome,是指此人外貌符合观察者的要求，但不激发更深层的感受。
定语从句特殊用法
定语从句中的特殊用法定语从句是起定语作用的,修饰,说明名词,代词或句子内容的从句,被定语从句修饰的词叫做先行词。
引导定语从句，并在句中担任成分的词叫做关系代词或关系副词。
定语从句是高考常考内容之一，使用时要尤其注意以下十种特殊用法。
一、只用that不用which的情况1、当先行词是all, little, few, much, something, everything, anything, nothing, none等不定代词时。
如：Everything that happened then was like a nightmare.当时发生的一切就像是一场噩梦。
I will tell him all that you told me at the ball.我要把你在舞会上跟我说的话全都告诉他。
2、当先行词被only, any, few, little, no, all, just, very（恰好的,表示强调）等词修饰时。
例如：The only thing that we could do was to wait.我们能做的只是等待。
That’s the very thing that we can do.那正是我们能做的事。
3、当先行词是序数词、形容词最高级或先行词被序数词或形容词最高级修饰时。
例如：The first place that we visited was the Great Wall.我们参观的第一个地方是长城。
This is the best novel that I have ever read.这是我看过的最好的小说。
4、被修饰词为数词时。
例如：Yesterday I caught two fish and put them in a basin of water. Now you can see the two that are still alive. 昨天我捉到了两条鱼，把它们放在一盆水里。
that引导的定语从句的用法
that引导的定语从句的用法关系代词that可以引导限定性定语从句，修饰代表人或事物的先行词，但不能用于引导非限定性定语从句。
that可以充当从句的主语、宾语、表语。
例如：The bag that lies on the ground is hers. 地上的那个包是她的。
（关系代词that修饰bag的定语从句中充当主语）The old man that I visited yesterday is my teacher. 我昨天拜访的那个老人是我的老师。
（关系代词that在修饰man的定语从句中充当宾语）在先行词是事物的限定性定语从句中， that和which一般可互换，但在下列情况下不可以互换：1. 只能用that，不能用which作先行词的情况（1）先行词是不定代词或者先行词被不定代词所修饰时，关系代词通常只用that，不用which。
例如：① That’s all that I know. 我知道的就这些。
② Is there anything that you want to buy in town? 你有什么东西要在城里买吗？③ Nothing that the teacher does doesn’t influence his students. 老师所做的事情没有不影响到学生的。
（2）先行词被序数词、形容词最高级、 the only, the very, the last等修饰时，关系代词通常只用that，不用which。
例如：① The first English novel that I read was Cities. 我读的第一本英文小说是《城市》。
② This is one of the most exciting football games that I have ever seen. 这是我见过的最激动人心的足球比赛之一。
③ This is the only thing that we can do now. 这是我们现在惟一能做的事情。
定语从句that和which、who（whom）用法
定语从句that和which、who（whom）用法定语从句that和which、who(whom)用法定语从句，一个简单句跟在一名词或代词后（先行词）进行修饰限定，就叫做定语从句。
下面是店铺为你带来的定语从句that和which、who(whom)用法，欢迎阅读！定语从句that和which、who(whom)用法1that和which的用法区别:在定语从句中，关系代词which和 that都可指物，一般情况下，可以互换使用。
但在下列情况下值得注意：A. 只能用that而不能用which的情形(1) 当先行词为：all, little, few, much, none 及 some-, any-, no-, every- 与 thing 所组成的复合单词时，只能用that。
如：There is nothing that will stop us making progress. 没有事情会阻止我们进步。
(2) 当先行词前面有only, some, any, no, every, little, few, much, all, very等形容词修饰时，只能用that。
如：This is the only problem that we can’t work out. 这是我们不能解决的唯一的一个问题。
(3) 当先行词由形容词的最高级或序数词修饰时，只能用that。
如：This is the most interesting book that I have ever read. 这是我读过的最有趣的书。
(4) 当先行词同时包括人和物时，只能用that。
如：Luxun and his works that we are familiar with are considered great. 人们认为我们所熟识的鲁迅及其作品都很伟大。
(5) 当先行词在定语从句中作表语时，只能用that。
如：This is a book that I have been looking for since last week. 这就是那本自上周以来我一直在寻找的书。
定语从句-关系词特殊用法.
Soon they came to a farm house, in front of which sat a small boy. Soon they came to a farm house. A small boy sat in front of （the house）. 状语 ？Soon they came to a farm house, where/which there is a small boy sat in front of. This is the factory in which/where my father works.
介词前置
1． 介词+which 表时间、地点或原因，代替 关系副词 when、where、why：
1）I still remember the day on which （ =when） I went to Beijing. 2）The factory in which （=where ）I work is a large one. 3) This is the reason for which (=why ) he was late for school.
16. This is the watch for which Tom is looking for. 17. The person to who you spoke is a student of Grade Two. whom 18. The house in that we live is very small. which
⑵ 先行词是序数词，或它前面有一个序数词时。 例如： ① This is the last place (that) I want to visit. ② It 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： ① You should hand in all that you have. ② We haven’t got much that we can offer you.
【英语知识点】that定语从句的用法
【英语知识点】that定语从句的用法关系代词that可以引导限定性定语从句，修饰代表人或事物的先行词，不能用于引导非限定性定语从句。
that可以充当从句的主语、宾语、表语。
that的用法注意：that常用作关系代词，可指代某人，也可指代某物，指物时有的时候可用which替换that，指人时可用who替换。
但在下列情况下，一般用that。
一、that指代某物事时1.先行词为all, few, little, much, the one, something, anything, everything, nothing等时。
（1）We'll do all that we can to protect the endangered plants and animals.我们将尽我们的最大努力来保护那些濒危的动植物。
（2）There is much that I wan to tell you.我有很多想要告诉你的话。
（3）Is there anything that I can do for you?有什么我可以帮你的吗？2.先行词被all, every, no, some, any, (a)few, (a)little, much等限定词修饰时。
（1）You can borrow any book that you want to read in our school library.在我们图书馆，你可以借任何你想读的书。
3.先行词被序数词或形容词最高级修饰时。
（1）This is the most beautiful city that I've ever seen.这是我见过的最漂亮的城市。
4.先行词被the only, the very, the right, the last 等修饰时。
（1）This is the very factory that they visited last summer holiday.这恰好是他们去年参观的那个工厂。
that在定语从句中做表语
that在定语从句中做表语that在定语从句中做表语that是定语从句中的关系副词，那that在定语从句中做表语有哪些知识？下面是店铺整理的关于that在定语从句中做表语的内容，欢迎阅读借鉴。
一、 that在定语从句中作表语时的省略。
关系代词作be 的表语,且先行词是特指时,关系代词通常用that(不用who或which)或省略:He doesn't seem to be the man (that) he was ten years ago. 他看起来已经不是十年前的样子了。
The modern aeroplane is not the machine (that) it was when first invented. 现代飞机已不是最先发明时的那种样子了。
She was not the cheerful woman (that) she was before she married.她已经不是结婚前的那个漂亮女人了。
She is all (that) a teacher should be.她具备一个老师应该具备的所有条件。
但如果先行词是泛指时,关系代词通常用which,且不省略:Even if John were a millionaire which he was not,he would not use a farthing of his wealth to benefit the people. 即使约翰是个百万富翁,他也不会用他的一分钱去做有益于人民的事。
而他并不是百万富翁。
He looked like a lawyer which he was.他像个律师,而他也的确是个律师。
二、 that在从句中作补语时。
例如: I'm not the fool(that) you thought me. 我不是你以前所认为的那个傻子了。
He is the nicest teacher (that) the students consider him in their school. 他就是学生认为学校中最好的'那个老师。
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三．限制性定语从句与非限制性定语从句
1．二者差异比较
限制定语从句紧跟先行词，同先行词这间一般不加逗号，仅修饰先行词，可以由关系代词．关系副词或that来引导。非限制性定语从句仅作补充或说明，用逗号与主句隔开，既可修饰先行词，又可修饰整个主句，不可用that引导。
(7)如果作先作词的集体名词着眼于集体的整体，关系代词用which;若是指集体中的各个成员，则用who。
(8)先行词有两个，一个指人，一个指物，关系代词应该用that。例如：
The boy and the dog that are in the picture are very lovely.
(9)如果先行词是anyone, anybody, everyone, everybody, someone, somebody,关系代词应该用who或whom，不用which。例如：
(2) from where为“介词＋关系副词“结构，但也可以引导定语从句。例如：
We stood at the top of the hill, from where we can see the town..
(3)像listen to, look at, depend on, pay attention to, take care of等固定短语动词，在定语从句中一般不宜将介词与动词分开。例如：
例４：This is the room that Shakespeare wasborn in.
２．关系代词的用法
(1)如果先行词是all, much, anything, something, nothing, everything, little, none等不定代词，关系代词一般只用that，不用which。例如：
定Hale Waihona Puke 从句用来说明主句中某一名词或代词（有时也可说明整个主句或主句中一部分）而起定语作用的句子叫作定语从句。
一．词引导的定语从句
1.关系代词用来指代先行词是人或物的名词或代词
句子成分用于限制从句或非限制性从句只用于限制性从句
代替人代替物代替人或物
主语Who which that
主语Whom whichthat
2) He was the only person in this country who was invited
定语从句一般紧接被它所修饰的先行词；但有时候它和先行词之间有可能插入其他成分，使它与先行词分隔开来，这种定语从句叫作被分隔的定语从句，在阅读文章时会经常遇到这种情况，在阅读是要注意识别先行词的修饰对象。
This is the boy whom she has taken care of.
二．关系副词引导的定语从句
1．关系副词也可以引导定语从句
关系副词在从句中分别表示时间．地点或原因。关系副词when在从句中充当时间状语，where充当地点状语，why充当原因状语。
2. that可引导定语从句表示时间．地点或原因
一般说来，定语从句被分割开来大致有以下三种：
①在先行词与定语从句之间插入一个状语。
如：There are many thousands of stars in the sky that are like the sun.
2．关系代词和关系副词的选择依据
(1)弄清代替先行词的关系词在从句中作什么成分,作状语的应选用关系副词，作主语．宾语或表语的可选用关系代词。
3.先行词与定语从句隔离
定语从句一般紧跟在先行词之后，但定语从句与先行词之间有时也会插入别的成分，构成先行词与定语从句的隔离。例如：
1) This is thearticle written by him that Is poke to you about..
He succeeded in the competition, which made his parents very happy.
(5) that可指人或物，在从句中作表语，（指人作主语时多用who）仅用于限制性定语从句中。
(6) which可作表语，既可指人，以可指物。指人时，一般指从事某种职业或是有种特征．品性或才能的人。Which引导的定语从句可以限制性的，也可以是非限制性的。
All the people that are present burst into tears.
(2)如果先等词被形容词最高级以及first, last, any, only, few, mush, no, some, very等词修饰，关系代词常用that,不用which, who，或whom。例如：
Is there anyone here who will go with you?
３．“介词＋关系代词“是一个普遍使用的结构
(1) “介词＋关系代词“可以引导限制性定语从句，也可以引导非限制性定语从句。“介词＋关系代词“结构中的介词可以是in, on, about, from, for, with, to at, of, without等，关系代词只可用whom或which,不可用that。
宾语Whose(=of whom) whose(=of which)
例１：This is the detective who came fromLondon.
例２：The book which I am reading is written by Tomas Hardy.
例３：The desk whose leg is broken is very old.
(3)非限制性定语从句中，不能用关系代词that,作宾语用的关系代词也不能省略。例如：
There are about seven million people taking part in the election, most of whom、are well educated.
(4) which还有一种特殊用法，它可以引导从句修饰前面的整个主句，代替主句所表示的整体概念或部分概念。在这种从句中，which可以作主语，也可以作宾语或表语，多数情况下意思是与and this相似，并可以指人。例如：