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定語從句語法總結(jié)
介詞的選用可根據(jù)從句中的相關(guān)詞組確定，該介詞通常可以放在關(guān)系代詞之前，也可放在從句之尾。以下是小編為大家整理分享的定語從句語法總結(jié)，歡迎閱讀參考。
定語從句語法總結(jié)
一．幾個(gè)基本概念1.定語從句的定義：用作定語的從句叫定語從句。
2.先行詞：被定語從句所修飾的名詞或代詞。
3.定語從句的位置：緊跟先行詞（名詞或代詞）之后。
4.引導(dǎo)詞：引導(dǎo)定語從句的詞（包括關(guān)系代詞和關(guān)系副詞）。
（1）關(guān)系代詞：that/who/whom/which/as
（2）關(guān)系副詞：when/where/why
5.引導(dǎo)詞的位置：位于定語從句之前（先行詞之后）。【as除外】
6.引導(dǎo)詞的功能（作用）：
（1）連接先行詞和定語從句。
（2）在定語從句中充當(dāng)一定的成分（關(guān)系代詞充當(dāng)主語或賓語，關(guān)系副詞充當(dāng)狀語）。
7.定語從句的類型：
（1）限定性定語從句（主句和定語從句之間無逗號(hào)）。
① 直接由引導(dǎo)詞引導(dǎo)定語從句
The man who you’re talking to is my friend.
② 由介詞+關(guān)系代詞（whom/which）引導(dǎo)
The man to whom you’re talking is my friend.
I need a pen with which I can write a letter.
=I need a piece of paper on which I can write a letter.
介詞的選用可根據(jù)從句中的相關(guān)詞組確定，該介詞通常可以放在關(guān)系代詞之前，也可放在從句之尾。例如：
The man (who/whom/that) I talked about at the meeting is from Beijing University.
=The man about whom I talked at the meeting is from Beijing University.
The palace (which/that) I often pay a visit to was built in the 17th century.
=The palace to which I often pay a visit was built in the 17th century.
（2）非限定性定語從句（主句和定語從句之間用逗號(hào)隔開）。
① 直接由引導(dǎo)詞引導(dǎo)定語從句。
② 由介詞+關(guān)系代詞（whom/which）引導(dǎo)。
I live in a house far away from the city, in front of which is a big tree.
There is an apple tree standing at the gate, on which are many apples.
This is the man to whom I gave the book.
③ 由“代詞/名詞+of+whom/which”或“of which/ whom +名詞/代詞”(先行詞指
人用whom,指物用which)引導(dǎo)。One, some, any, none, all, both, several, many, most, neither, either等詞、數(shù)詞、分?jǐn)?shù)或百分比與of whom或of which連用。
He has five children, two of whom are abroad.
(比較：He has five children, and two of them are abroad.)
We have three books, none of which is/are interesting.
(比較：We have three books, but none of them is/are interesting.)
除why和that不能引導(dǎo)非限定性定語從句外，其余引導(dǎo)詞都可以，用法同限定性定語從句一樣。但要注意以下區(qū)別。
1.在形式上非限定性定語從句與主句有逗號(hào)隔開。
2.非限定性定語從句的作用：它只是補(bǔ)充說明先行詞的情況，翻譯時(shí)可譯成兩個(gè)句子。
The engineer, whose leg was badly hurt, was quickly sent to hospital.
（那位工程師被很快送往醫(yī)院，其腿部受了重傷）
The engineer whose leg was badly hurt was quickly sent to hospital.
（那位腿部受了重傷的工程師被很快送往醫(yī)院）
3.在非限定性定語從句中，任何引導(dǎo)詞都不能省略（包括引導(dǎo)詞在此定語從句中充當(dāng)賓語在內(nèi)）。指人做主語時(shí)只能用who, 做賓語時(shí)用whom; [要學(xué)習(xí)網(wǎng)-中學(xué)生最喜歡的學(xué)習(xí)論壇；網(wǎng)址www.yaoxuexi.cn手機(jī)版地址wap.yaoxuexi.cn]
指物做主語，賓語都用which; 關(guān)系副詞用when或where，也不能省略。
The man, ______ is sitting on the chair, is my father.
The woman, _______ I met yesterday, is my English teacher.
The city, _______ is far away, is very beautiful.
He went to America, ______ his parents live.
He joined the Army yesterday, ______ I left, too.
4.whose引導(dǎo)非限定性定語從句：
The house, whose window faces south, is mine.
=The house, the window of which faces south, is mine.
＝The house, of which the window faces south, is mine.
二.定語從句中關(guān)系代詞和關(guān)系副詞的基本用法
1.who/that指人是主格在定語從句中代替先行詞，又作定語從句的主語，不能省略。
Do you know the gentleman who/that is sitting there?
2.whom/who/that指人是賓格，在定語從句中代替先行詞，又作定語從句的賓語（動(dòng)賓或介賓）。
① 當(dāng)作動(dòng)賓（動(dòng)詞后接賓語）時(shí)，關(guān)系代詞可省略。
Do you know the gentleman (whom/who/that) we met just now?
② 當(dāng)作介賓（介詞后接賓語）時(shí)：
介詞不提前時(shí)，關(guān)系代詞可省略；
介詞提前時(shí)，關(guān)系代詞不可省，即介詞＋whom(指人時(shí)介詞后的關(guān)系代詞只能用whom)。
The man (whom/who/that) I spoke with is my teacher.
The man with whom I spoke is my teacher.
※注：固定的動(dòng)詞短語（動(dòng)詞+介詞）如look for, take care of等不能把動(dòng)詞與介詞拆開，既介詞不能提至引導(dǎo)詞前。
She is the right girl (who/whom/that) we are looking for.
3.whose: 指人或物，是所有格“…的”形式。Whose+n.一起在定語從句中充當(dāng)主語、賓語（動(dòng)賓或介賓）即先行詞的什么東西怎樣了，whose不能省略。。Whose+n. = the +n. + of which/whom= of which/ whom+ the =n.
I didn’t find the desk whose leg was broken. （主語）
He is the student whose pencil I broke yesterday. （動(dòng)賓）
The boss in whose company I work is very kind. （介賓）
4.which/that 指物，指代先行詞且在定語從句中作主語或賓語（動(dòng)賓或介賓）。
① 當(dāng)作動(dòng)賓時(shí)，關(guān)系代詞可省略。
② 當(dāng)作介賓時(shí)：
介詞不提前時(shí)，關(guān)系代詞可省略；
介詞提前時(shí)，關(guān)系代詞不可省，即介詞＋which(指物時(shí)介詞后的關(guān)系代詞只能用which)。
The house which/that was destroyed in the earthquake is weak.
The pen (which/that) you found yesterday is mine.
The games (that/which) the young men competed in were difficult.
The games in which the young men competed were difficult.
※注:介詞+關(guān)系代詞即介詞+whom/which(先行詞指人用whom，指物用which)。
※5.as指人或物，在定語從句中可作主語，賓語，表語或狀語，不能省略。主要用于 “the same …as…；such …as…；so …as…；as … as…；as follows”固定結(jié)構(gòu)中，形式固定此時(shí)的引導(dǎo)限定性定語從句。要用as代替who(m), which, 或that引導(dǎo)定語從句：
Such people as knew Hill thought he was honest.
Such people as Hill knew thought he was honest.
My hometown is no longer the same as it was.
Here is so big a stone as no one can lift.
The child knows as much as grow-ups (know).
I’d like to have the same books as are used in your school.
He is not such a person as I expected.
He will marry as pretty a girl as he can find.
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