在高考中，定語從句會考哪些知識呢？一起來學習定語從句歸納知識吧。
定語從句(Attributive Clauses)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後，由關係詞(關係代詞或關係副詞)引出。
關係代詞有：who, whom, whose, that, which, as。
關係副詞有：when, where, why, how。
關係代詞和關係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。
定語從句分爲限制性定語從句和非限制性定語從句。
1關係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)
關係代詞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) 介詞後不能用
We depend on the land from which we get our food.
c) 多用who 的情況
①關係代詞在從句中做主語
A friend who helps you in time of need is a real friend.
②先行詞爲those, people 時
Those who were either fools or unfit for their offices could not see the cloth.
③先行詞爲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,但若先行詞後接兩個以上的並列定語從句時，後一個必須重複前一個關係代詞。
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作爲定語從句的關係代詞的情況
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)先行詞爲序數詞(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 以避免重複。
Who is the person that is standing at the gate.
f)關係代詞在從句中做表語
He is not the man that he used to be.
3關係副詞引導的定語從句
關係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。
關係副詞when, where, why, how的含義相當於"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"結構不能代替關係副詞。
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，介詞仍放在動詞後面。
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 + 關係代詞引導定語從句
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，相當於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於句首，而which不可。
As we all know, he never smokes.
(2) as 代表前面的整個主句並在從句中作主語時，從句中的謂語必須是系動詞;若爲行爲動詞，則從句中的關係代詞只能用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.
(4)As 的用法 the same? as; such?as 中的as 是一種固定結構, 和??一樣??。
I should like to use the same tool as is used here.
We should have such a dictionary as he is using.
◆高考定語從句典型陷阱題分析◆
1. The factory was built in a secret place, around ______ high mountains.
A. which was B. it was C. which were D. them were
【陷阱】容易誤選A或B，將A、B中的 which 和 it 誤認爲是其後句子的主語。
【分析】最佳答案是C，around which were high mountains 是一個由“介詞+which”引出的非限制性定語從句，而在該從句中，主語是 high mountains，around which 是表語，所以句子謂語應用複數were，而不是用單數 was.請做以下類例題目（答案均爲C）：
（1） Yesterday we visited a modern hospital, around _______ some fruit shops.
A. which is B. it is C. which are D. them are
（2） The murder happened in an old building, beside ______ the city police station.
A. which are B. it is C. which is D. them are
（3） Next month we’ll move to a new building, next to _______ a nice restaurants where we can have Chinese food.
A. which are B. it is C. which is D. them are
2. A man with a bleeding hand hurried in and asked, “Is there a hospital around ______ I can get some medicine for my wounded hand？”
A. that B. which C. where D. what
【陷阱】容易誤選 B，認爲 around 是介詞，選 which 用以代替前面的名詞 hospital，在此用作介詞 around 的賓語。
【分析】最佳答案爲C。以上語法分析並不算錯，但問題是，照此分析，此句的意思即爲：有沒有這樣一個醫院，我在它的附近可以買藥治我的手傷？這樣的語境顯然有點不合情理，因爲人們通常是在醫院裏面治傷，而不是在醫院附近治傷。此題選 C 的理由是：句中的. around 不是介詞，而是副詞，意爲“在附近”；其後的 where 引導定語從句用以修飾其前的地點名詞 hospital，句意爲：附近有沒有一家醫院，我可以去治我的手傷？
3. _____ is known to everybody, the moon travels round the earth once every month.
A. It B. As C. That D. What
【陷阱】容易誤選 A，認爲此處應填一個形式主語。
【分析】最佳答案是 B。as 引導的是一個非限制性定語從句。比較下面一題：
_______ is known to everybody that the moon travels round the earth once every month.
A. It B. As C. That D. What
此題答案選 A，it 爲形式主語，真正的主語是後面的 that 從句。
再比較下面一組題，其中第（1）題選 B，第（2）題選 D：
（1） ______ is mentioned above, the number of the students in senior school is increasing.
A. Which B. As C. That D. It
（2） ______ is mentioned above that the number of the students in senior school is increasing.
A. Which B. As C. That D. It
4. David is such a good boy _______ all the teachers like.
A. that B. who C. as D. whom
【陷阱】此題容易誤選A，許多同學一看到題幹中的such，再聯繫到選項中的 that，便認爲這是考查such … that …句式。況且，這樣理解意思也還通順。
【分析】最佳答案爲C，不是A，因爲在such … that … （如此……以至……）結構中，that 引導的是結果狀語從句，並且 that 在從句中不充當句子成分，若在上句填入 such … that …，句末的動詞 like 缺賓語。選C的理由如下：as 用作關係代詞，用以引導定語從句，修飾其前的名詞 boy，同時 as 在定語從句中用作動詞 like 的賓語，句意爲“所有老師都喜歡的一位好男孩”。有的同學可能還會問，假若選A，能否將其後的 that 視爲引導定語從句的關係代詞呢？不能，因爲當先行詞受到 such 的修飾時，其後的定語從句應用關係代詞 as 來引導，而不用that.比較下面一題，答案爲A，因爲 like 後有自己的賓語 him：
David is such a good boy _______ all the teachers like him.
A. that B. who C. as D. whom
請再做以下試題（答案選D）：
It was not such a good dinner _______ she had promised us.
A. like B. that C. which D. as
5. The buses, most of _______ were already full, were surrounded by an angry crowd.
A. that B. it C. them D. which
【陷阱】容易誤選 C，用 them 代指 the buses.
【分析】最佳答案是D。most of which were already full 爲非限制性定語從句，修飾 the buses.類似地，以下各題也選D：
（1） His house, for _______ he paid $10, 000, is now worth $50, 000.
A. that B. it C. them D. which
（2） Ashdown forest, through _______ we’ll be driving, isn’t a forest any longer.
A. that B. it C. them D. which
（3） This I did at nine o’clock, after _______ I sat reading the paper.
A. that B. it C. them D. which
類似地，以下各題選 whom，不選 them：
（4） George, with _______ I played tennis on Sundays, was a warm-hearted person.
A. that B. him C. them D. whom
（5） Her sons, both of ______ work abroad, will come back home this summer.
A. that B. who C. them D. whom
（6） I met the fruit-pickers, several of _______ were still university students.
A. that B. who C. them D. whom
6. He had thousands of students, many of ______ gained great success in their own field.
A. whom B. them C. which D. who
【陷阱】容易誤選 B，用 them 代指 students.
【分析】最佳答案是A，many of whom gained great success in their own field 爲非限制性定語從句。假若在many of… 的前面加上連詞and，則選答案B.比較以下各題（答案均選A）：
（1） He asked a lot of questions, none of ______ was easy to answer.
A. which B. them C. what D. that
（2） He asked a lot of questions, and none of ______ was easy to answer.
A. them B. which C. what D. that
（3） He told me that he had two girl-friends, neither of _______ knew anything about the other.
A. whom B. them C. which D. who
（4） He told me that he had two girl-friends, and neither of _______ knew anything about the other.
A. them B. whom C. which D. who
7. He had a lot of friends, only a few of ______ invited to his wedding.
A. whom B. them C. which D. who
【陷阱】容易誤選 A，認爲這是非限制性定語從句。
【分析】最佳答案是B，這不是非限制性定語從句，而是一個獨立主格結構，因爲空格後的動詞 invited 並不是一個完整的謂語，而是一個過去分詞。當然，假若在 invited 前加上助動詞 were，則是一個非限制性定語從句，答案便應選A.比較：
（1） They put forward a lot of plans at the meeting, none of _______ carried out in their work.
A. which B. them C. what D. that
答案選B，none of them carried out in their work 是獨立主格結構，其中的 carried out 爲過去分詞。
（2） They put forward a lot of plans at the meeting, none of _______ were carried out in their work.
A. which B. them C. what D. that
答案選A，none of them were carried out in their work 是非限制性定語從句，注意與上例比較句中多了一個助動詞were.
（3） They put forward a lot of plans at the meeting, but none of _______ were carried out in their work.
A. which B. them C. what D. that
答案選B，由於兩句之間增加了一個並列連詞but，使得該句成了一個並列句。
8. On Sundays there were a lot of children playing in the park, _______ parents seated together joking.
A. their B. whose C. which D. that
【陷阱】容易誤選B，認爲這是非限制性定語從句。
【分析】最佳答案是A.與上面一題相似，their parents seated together joking 不是非限制性定語從句，而是一個獨立主格結構，因爲空格後的動詞 seated 不是謂語，而是一個過去分詞，因爲 seat 作動詞用時，是及物動詞。比較以下相似題：
（1） On Sundays there were a lot of children playing in the park, _______ parents were seated together joking.
A. their B. whose C. which D. that
選e parents were seated together joking 爲非限制性定語從句，因爲其後有完整的謂語 were seated.
（2） On Sundays there were a lot of children playing in the park, and _______ parents were seated together joking.
A. their B. whose C. which D. that
選A.因爲句中有並列連詞and，整個句子爲並列句。
（3） On Sundays there were a lot of children playing in the park, _______ parents sitting together joking.
A. their B. whose C. which D. that
選r parents sitting together joking 爲獨立主格結構。
（4） On Sundays there were a lot of children playing in the park, _______ parents sat together joking.
A. their B. whose C. which D. that
選e parents sat together joking 爲非限制性定語從句，因爲句中有完整的謂語 sat.
（5） On Sundays there were a lot of children playing in the park, _______ parents were sitting together joking.
A. their B. whose C. which D. that
選e parents were sitting together joking 爲非限制性定語從句，因爲句中有完整的謂語 were sitting.
9. If the man is only interested in your looks, _____ just shows how shallow he is.
A. as B. which C. what D. that
【陷阱】容易誤選A或B，誤這是非限制性定語從句。
【分析】正確答案爲D，注意逗號前是一個條件狀語從句，逗號後是該狀語從句的主句，that 在此代表前文所述的情況，用作主句的主語。類似地，下面幾道題也選 that，而不選 which：
（1） If you promise to go with us, _____ will be OK.
A. as B. which C. and it D. that
（2） If you want a double room, _____ will cost another ￡15.
A. as B. which C. what D. that
（3） Whether you go or not, _______ is quite all right with me.
A. that B. which C. and it D. so
（4） When I say two hours, _____ includes time for eating.
A. as B. which C. what D. that
10. She says that she’ll never forget the time ________ she’s spent working as a secretary in our company.
A. which B. when C. how D. where
【陷阱】容易誤選B，機械地認爲時間名詞後必須用關係副詞when，地點名詞後用關係副詞 where.
【分析】正確答案爲A.在時間名詞和地點名詞後是否用關係副詞要看它在定語從句中充當什麼句子成分。一般說來，若用作主語或賓語，用關係代詞；若用作狀語，則用關係副詞。上面一題中的動詞 spent 缺賓語，故應用關係代詞 which或that.比較下面一題，由於空格後的句子不缺少主語或賓語，所以選關係副詞when：
She says that she’ll never forget the time ________ she works as a secretary in our company.
A. which B. when C. how D. where
請再做一組試題（答案均選A）：
（1） Our company will move to a tall building _______ we bought last month.
A. which B. when C. how D. where
選A，which 在定語從句中用作動詞 bought 的賓語。
（2） Our company will move to a tall building _______ has just been complete.
A. which B. when C. how D. where
選A，which 在定語從句中用作主語。
（3） Our company will move to a tall building _______ we worked two years ago.
A. where B. when C. that D. which
選A，where 在定語從句中用作狀語。
