1. 定語的定義

定語用來限定、修飾名詞或代詞的，是對名詞或代詞起修飾、限定作用的詞、短語(動詞不定式短語、動名詞短語和分詞短語)或句子，漢語中常用“……的”表示。主要由形容詞擔任，此外，名詞，代詞，數詞，分詞，副詞，不定式以及介詞短語也可以來擔任，也可以由一個句子來擔任。單詞作定語時通常放在它所修飾的詞之前，作前置定語。短語和從句作定語時則放在所修飾的詞之后，作后置定語。

定語從句是指在一個句子中作定語的句子，定語從句要放在所修飾的詞后。

如：1) the man who lives next to us is a policeman.

2) you must do everything that i do.

上面兩句中的man和everything是定語從句所修飾的詞，叫先行詞，定語從句放在先行詞的后面。

引導定語從句的詞有關系代詞that, which, who(賓格whom, 所有格whose)和關系副詞where, when、why

關系詞常有三個作用：1、引導定語從句;2、代替先行詞;3、在定語從句中擔當一個成分。

2. 定語從句中關系代詞與關系副詞的選擇

1. 明確關系代詞，關系副詞在定語從句中的不同作用

關系代詞which , that , who在定語從句中作主語或在及物動詞或介詞后作賓語

關系副詞when , where, why在定語從句中作狀語，即定語從句中不缺主語、賓語，只缺時間、地點或原因狀語

2. 分析句子結構，明確句法成分

關系詞在從句中作賓語還是作狀語，關鍵取決于從句中的謂語動詞。如果定語從句中謂語動詞是及物動詞，應觀察其后有無賓語。如果沒賓語，則應考慮使用能充當賓語的關系代詞which或that。如果句子中有賓語，就考慮關系副詞when或where等。

3.定語從句的三種功能

定語從句在句中相當于一個形容詞，起定語的作用，修飾說明名詞、代詞或主語的全部內容。通常在被修飾的詞語(即先行詞)之后，由“關系詞”引導。定語從句的三種功能：

1.連接功能：連接從句，引導一個定語從句

2.指代功能：指代先行詞

3.語法功能：在定語從句中充當句子成分

4. 關系代詞的用法

(1) 如果先行詞是all, much, anything, something, nothing, everything, little, none等不定代詞，關系代詞一般只用that，不用which。例如：

all the people that are Psent burst into tears.

(2) 如果先行詞被形容詞最高級以及first, last, any, only, few, mush, no, some, very等詞修飾，關系代詞常用that,不用which, who，或whom。例如：

this is the first composition that he has written in english.

(3) 非限制性定語從句中，不能用關系代詞that,作賓語用的關系代詞也不能省略。例如：

there are about seven million people taking part in the election, most of whom are well educated.

(4) which還有一種特殊用法，它可以引導從句修飾前面的整個主句，代替主句所表示的整體概念或部分概念。在這種從句中，which可以作主語，也可以作賓語或表語，多數情況下意思是與and this 相似，并可以指人。例如：

he succeeded in the competition, which made his parents very happy.

(5) 如果作先行詞的集體名詞著眼于集體的整體，關系代詞用which;若是指集體中的各個成員，則用who。

(6) 先行詞有兩個，一個指人，一個指物，關系代詞應該用that。例如：

the boy and the dog that are in the picture are very lovely.

(7) 如果先行詞是anyone, anybody, everyone, everybody, someone, somebody,關系代詞應該用 who 或whom，不用 which。例如：

is there anyone here who will go with you?

英語定語從句知識點總結筆記

"介詞+關系代詞"是一個普遍使用的結構

(1) "介詞+關系代詞"可以引導限制性定語從句，也可以引導非限制性定語從句。"介詞+關系代詞"結構中的介詞可以是 in, on, about, from, for, with, to, at, of, without 等，關系代詞只可用whom或 which,不可用 that 。

(2) from where為"介詞+關系副詞"結構，但也可以引導定語從句。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等固定短語動詞，在定語從句中一般不宜將介詞與動詞分開。例如：

this is the boy whom she has taken care of.

定語從句在句中做定語，修飾一個名詞或代詞，有時也可以修飾部分或整個句子。

被修飾的名詞，詞組或代詞即先行詞。定語從句通常出現在先行詞之后，由關系詞(關系代詞或關系副詞)引出。

關系代詞有：who, whom, whose, that, which, as。

關系副詞有：when, where, why, how。

關系代詞和關系副詞放在先行詞和定語從句之間，起連接作用，同時又可做定語從句的一個成分。當關系代詞做賓語時可以省略。

定語從句中的謂語動詞必須在人稱上和數量上和先行詞保持一致。

定語從句分為限制性定語從句和非限制性定語從句。

關系代詞引導的定語從句

1) who, whom, that 這些詞代替的先行詞是人的名詞或代詞，在從句中所起作用如下：

is he the man who/that wants to see you?(who/that在從句中作主語)

he is the man whom/ that i saw yesterday.(whom/that在從句中作賓語)

2) whose 用來指人或物，(只用作定語，若指物，它還可以同of which互換).

例如：please pass me the book whose (of which) cover is green.

3) which, that 它們所代替的先行詞是事物的名詞或代詞，在從句中可作主語、賓語等.

例如：a prosperity which / that had never been seen before appears in the countryside.(which / that在句中作賓語)

the package (which / that) you are carrying is about to come unwrapped.(which / that在句中作賓語)

關系代詞that和which 都可以指物，that 和who 都可以指人，其用法區別：

不用that的情況：

a) 在引導非限定性定語從句時

(錯)the tree, that is four hundred years old, is very famous here.

b) 介詞后不能用

we depend on the land from which we get our food.

c) 多用who 的情況

①關系代詞在從句中做主語

a friend who helps you in time of need is a real friend.

②先行詞為those, people 時

those who were either fools or unfit for their offices could not see the cloth.

③先行詞為all, anyone, ones, one 指人時

one who doesn‘t work hard will never succeed in his work.

④在there be句型中there is a stranger who wants to see you.

⑤在被分隔的定語從句中

a new teacher will come tomorrow who will teach you german.

⑥在有兩個定語從句的句子中，其一用who，其二用that,但若先行詞后接兩個以上的并列定語從句時，后一個必須重復前一個關系代詞。

the student who was praised at the meeting is the monitor that is very modest and studies very hard.

there is a teacher who is always ready to help others and who enjoys what he does.

只能用that作為定語從句的關系代詞的情況

a)在不定代詞，如：anything, nothing, everything, all, much, few, any, little等作先行詞時，只用that，不用which。

all that is needed is a supply of oil.

finally, the thief handed everything that he had stolen to the police.

b)先行詞有the only, the very, the just修飾時，只用that。

he is the very man that helped the girl out of the water.

c)先行詞為序數詞(the last)、數詞、形容詞最高級時，只用that。

the first english book that i read was "the prince and the pauper" by mark twin.

d)先行詞既有人，又有物時。

he talked about the teachers and schools that he visited.

e)當主句是以who 或which 開始的特殊疑問句時，用that 以避免重復。

who is the person that is standing at the gate.

f)關系代詞在從句中做表語

he is not the man that he used to be.

關系副詞引導的定語從句

關系副詞可代替的先行詞是時間、地點、方式或理由的名詞，在從句中作狀語。

關系副詞when, where, why, how的含義相當于"介詞+ which"結構，因此常常和"介詞+ which"結構交替使用.

例如：

there are occasions when (on which) one must yield.

beijing is the place where (in which) i was born.

is this the reason why (for which) he refused our offer?

i‘m surprised the way how (by which) he works out the problem.

注意：

①在非限制性定語從句中，"介詞+ which"結構不能代替關系副詞。

如：they set up a state for their own , where they would be free to keep negroes as slaves.

②含有介詞短語的動詞一般不能拆開，介詞仍放在動詞后面。

is this the book which (that) she was looking for?

③名詞/數詞/代詞 /形容詞最高級 + 介詞 + 關系代詞引導定語從句

she has written a book , the name of which i have forgotten.

there are fifty-five students in our class , all of whom are working hard.

there are five continents in the world , the largest of which is asia.

④as, which 引導非限定性定語從句的差別

由as, which 引導的非限定性定語從句，as和which可代整個主句，相當于and this或and that。as一般放在句首，which在句中。

as we know, smoking is harmful to one‘s health.

the sun heats the earth, which is very important to us.

as可引導非限制性從句，常帶有“正如”的意思。

as is know, smoking is harmful to one‘s health.

用法區別：

(1) as 引導的定語從句可置于句首，而which不可。

as we all know, he never smokes.

(2) as 代表前面的整個主句并在從句中作主語時，從句中的謂語必須是系動詞;若為行為動詞，則從句中的關系代詞只能用which。

(3)非限定性定語從句中出現expect, think, suppose 等表示猜測、想象、預料等時。

she succeeded in her doing the research work , as we expected.

定語從句（attributive clauses）在句中做定語，修飾一個名詞或代詞，被修飾的名詞，詞組或代詞即先行詞。定語從句通常出現在先行詞之后，由關系詞（關系代詞或關系副詞）引出。

關系代詞有：who, whom, whose, that, which等。

關系副詞有：when, where, why等。

關系代詞引導的定語從句

關系代詞所代替的先行詞是人或物的名詞或代詞，并在句中充當主語、賓語、定語等成分。關系代詞在定語從句中作主語時，從句謂語動詞的人稱和數要和先行詞保持一致。

1）who, whom, that

這些詞代替的先行詞是人的名詞或代詞，在從句中所起作用如下：

is he the man who/that wants to see you? 他就是想見你的人嗎？（who/that在從句中作主語）

he is the man whom/ that i saw yesterday. 他就是我昨天見的那個人。（whom/that在從句中作賓語）

2）whose

用來指人或物，（只用作定語, 若指物，它還可以同of which互換），例如：

they rushed over to help the man whose car had broken down. 那人車壞了，大家都跑過去幫忙。

please pass me the book whose (of which) cover is green. 請遞給我那本綠皮的書。

3）which, that

它們所代替的先行詞是事物的名詞或代詞，在從句中可作主語、賓語等，例如：

a prosperity which / that had never been seen before appears in the countryside. 農村出現了前所未有的繁榮。（which / that在句中作賓語）

the package (which / that) you are carrying is about to come unwrapped. 你拿的包快散了。（which / that在句中作賓語）

關系副詞引導的定語從句

關系副詞可代替的先行詞是時間、地點或理由的名詞，在從句中作狀語。

1）when, where, why

關系副詞when, where, why的含義相當于"介詞+ which"結構，因此常常和"介詞+ which"結構交替使用，例如：

there are occasions when (on which) one must yield. 任何人都有不得不屈服的時候。

beijing is the place where (in which) i was born. 北京是我的出生地。

is this the reason why (for which) he refused our offer? 這就是他拒絕我們幫助他的理由嗎？

2）that代替關系副詞

that可以用于表示時間、地點、方式、理由的名詞后取代when, where, why和"介詞+ which"引導的定語從句，在口語中that常被省略，例如：

his father died the year (that / when / in which) he was born. 他父親在他出生那年逝世了。

he is unlikely to find the place (that / where / in which) he lived forty years ago. 他不大可能找到他四十年前居住過的地方。

一.定語從句知識點歸納總結大全

二.定語從句的that可以省略嗎

三.定語從句的作用

四.定語從句關系副詞用法

五.定語從句分類

六.怎么判斷定語從句

七.定語從句where用法

八.如何判斷定語從句

九.as可以引導定語從句嗎

十.定語從句什么時候只能用that