定語從句是英語中常見的句型，為了方便考生們更好的掌握，庫課小編今天就來給大家詳細(xì)講解一下什么叫定語從句以及定語從句的?？贾R(shí)點(diǎn)，一起看看吧。
定語從句簡(jiǎn)介：
一、什么叫定語從句
一個(gè)句子作定語就叫定語從句。
二、定語從句的結(jié)構(gòu)及種類
1.結(jié)構(gòu)：關(guān)系詞+主語+謂語+其它。
2.種類：限制性定語從句和非限制性定語從句。
三、關(guān)系詞的分類及關(guān)系詞
1.關(guān)系代詞：who，whom, whose, that ,which, as.
2.關(guān)系副詞：when，where，why.
四、關(guān)系詞的功用
1.起連接作用，引導(dǎo)定語從句。
2.在定語從句中作一個(gè)成分——主語，賓語，狀語，定語，表語。
五、什么是先行詞
被定語從句所修飾的詞是先行詞。
定語從句知識(shí)點(diǎn)介紹：
一、介詞+which/whom
1.介詞+which/whom
?、?介詞的選擇根據(jù)下面四種情況
a.根據(jù)定語從句中的謂語動(dòng)詞
Who is the person with whom you shook hands just now?
b.根據(jù)定語從句中的形容詞
In learning English, he had two things about which he was not sure.
c.根據(jù)定語從句所修飾的先行詞
This is the bike by which I go to school.
d.根據(jù)句意
This is the train on which he works.
?、?如果關(guān)系詞指人，選whom，如果關(guān)系詞指物，選which。
2.不定代詞+of+which/whom
常用的不定代詞有：both, neither, either(兩者之一)，all, none, many, most, some, any。
Mr. Li has two sons, both of whom are college students.
There are 10.000 books in this library, most of which are interesting.
3.數(shù)詞，分詞，百分?jǐn)?shù)+of+which/whom
There are 50 students in our class, two thirds of whom are girls.
4.the+名詞+of+which=whose+名詞
He has just bought a magazine, the cover of which (=whose cover) is missing.
5.介詞+whose+名詞
This is our school teaching building, on whose top there is a red flag.
二、關(guān)系代詞用法
由于篇幅較長(zhǎng)，考生可以點(diǎn)擊查看：專升本英語定語從句關(guān)系詞的用法——when,where,who,which.....
三、特殊的定語從句
1.非限制性定語從句
如果主語和定語從句之間有個(gè)逗號(hào)，它就是非限制性定語從句。引導(dǎo)非限制性的定語從句的關(guān)系詞有：which，who, when, where, why, whom, whose。
2.分隔性的定語從句
有時(shí)定語從句和先行詞之間被其他詞隔開，把這種從句叫分隔性的定語從句。
The days are gone when China used foreign oil.
= Gone are the days when China used foreign oil.
3.The way 作先行詞
引導(dǎo)定語從句的關(guān)系詞有三種情況：that, in which 省略。
I don’t like the way ___D___ you do things.
A. that B. in which C. × D. all of the above
4. One of
Nne of+the+復(fù)數(shù)名詞+定語從句，謂語動(dòng)詞用復(fù)數(shù)，the only one of +the 復(fù)數(shù)名詞+定語從句，謂語動(dòng)詞用單數(shù)。
He is one of the teachers in our school who teach well.
He is the only one of the teachers in our school who teaches well.
注意：
1. 在定語從句中，謂語動(dòng)詞的單數(shù)，復(fù)數(shù)依據(jù)它所修飾的先行詞。
I, who am your teacher, will help you with everything.
He who breaks the school rules should be punished.
Those who break the school rules should be punished.
Anyone who breaks the school rules should be punished.
2. 定語從句和并列句的區(qū)別
非限制性的定語從句和主語之間有一個(gè)逗號(hào)，并列句的結(jié)構(gòu)式單句+并列連詞(and, or. so, but)+簡(jiǎn)單句.
I have many friends, all of whom are kind to me.
I have many friends and all of them are kind to me.