英語作文定語從句怎麼用
我以前也不太懂，在佩文教育學總算弄懂，這里簡單跟樓主介紹一下狀語從句，同位語，還有定句從句的區別，僅供參考：狀語從句：一般作為先行條件，解釋什麼樣的情況下發生什麼樣的事情，主要作為「條件」，一般放在句前，也有放在句子後面的，較少。同位語：一般作為解釋一個」詞「，這個詞通常為主語/賓語，也有定語，但是同位語的作用就是用來說明這個主語或者賓語處於什麼狀態，是什麼樣子等等。定語從句：很顯然，定語從句是用來做形容詞的，它通常用來形容主語/賓語/或者一整個句子希望可以幫助樓主
② 英語定語從句的使用
仔細看看我下面給出的內容，你就會看到你需要的：
The Attributive Clause ( I )
1. Definition （定義）
定語從句: 在復合句中,修飾某個名詞或代詞的從句叫定語從句。
被修飾的詞稱為先行詞(antecedent )．
連接定語從句和先行詞的詞稱為關系詞。
2. 關系詞：
關系代詞(relative pronoun):
who,that ,which, whom,whose 作主語／賓語 / 定語
關系副詞(relative adverb): when, where ,why 作狀語
3. 關系詞的作用
1）連接作用
2）替代作用
3）成分作用
Madame Curie is unforgettable because she is the first female who /that won the Nobel Prize.
4.關系詞的選用
關系詞的選用是依據先行詞在定語從句中的所充當的成分來確定的。
Madame Curie is unforgettable because she is the first female who /that won the Nobel Prize.
Madame Curie is unforgettable because she is a scientist whose discoveries are very important
Madame Curie is unforgettable because she is a scientist whom/that we can learn much from.
Things / places
The Internet is unforgettable because it is a thing that/which has greatly changed our way of life.
The Internet is unforgettable because it is a necessity which /that modern life can』t go without.
The Internet is unforgettable because it is a thing whose functions (功能)are powerful.
5. 在下列情況關系代詞只能用that而不用which。
先行詞為all, everything, anything, nothing, none, little,few, much等不定代詞時。
eg. You must do everything that I do.
2) 先行詞被all, every, no, any, little, much, some, just等修飾時。
eg. Is there any question that troubles you much ?
3) 當先行詞被序數詞或形容詞最高級以及the only, the very, the last等修飾時。
eg. James is the best singer that I have ever known.
4) 當先行詞是人和物構成的片語時。
eg. They were talking about the people and places
( that ) they had visited.
5) 當句中有who 或which 時,為避免重復。
eg. Which is the book ( that ) he borrowed from the library ?
eg. Who is the person that is talking to our headmaster?
6). 關系代詞在從句中作表語時;
eg.My hometown is no longer the village that it used to be.
由關系副詞引導的定語從句
關系副詞在定語從句中相當於一個介詞片語，通常在定語從句中是充當狀語的，表示地點、時間或原因狀語。
1. Where： 當先行詞是表示地點的名詞，且從句中缺少地點狀語，此時使用where。
The hotel where we stayed wasn』t very clean. in the hotel in which
2. When: 當先行詞是表示時間的名詞，且從句中缺少時間狀語，此時用when。
Do you remember the day when we met? on the day on which Morning is the best time when we practise reading
English aloud. in the morning in which
3.Why: 當先行詞是reason，且從句中缺少原因狀語，
此時用why 做關系詞。
Can you tell me the reason why the little boy cried？for the reason for which
where/when/why= prep.+which
4.在「介詞+關系代詞」引導的定語句中, 介詞在定語句中的位置一般有兩種：1). 一些介詞既可以放在關系代詞的前面，也可以放在從句中。如：
I paid 2 dallors for the pen.
The pen which I paid 2 dollars for was lost.
= The pen for which I paid 2 dollars was lost.
The lady whom he was dancing with stepped on his foot.
= The lady with whom he was dancing stepped on his foot.
2). 在含有介詞的動詞短語中，介詞一般不提前，如：
This is the very boy whom I have been looking for.
The old lady who needs to be taken care of has no children.
直接放在介詞後面，不用that 。
先行詞指人時介詞後用whom, 指物用which。
5. 在「介詞+關系代詞」引導的定語句中，介詞的選擇一般採取以下幾種方式：
1).根據先行詞選擇介詞，如：
I still remember the day on which she first wore that pink dress
The pencil with which I wrote my homework was broken.
(句中介詞with是根據先行詞pencil來的。
with the pencil表示「用鉛筆寫」， 是固定搭配。)
2).根據從句中動詞選擇介詞，如：
The girl about whom I talked with you yesterday will come to our school soon.
(句中介詞about是根據片語talk about 來的。)
The hotel at which you stayed last year is being rebuilt now.
(stay at some places)
3).根據句意選擇介詞，如：
The brave man by whom the tiger was shot is a good hunter.
The clever boy made a hole in the wall, through which he could see what
定語從句的分類：
限制性定語從句和非限制性的定語從句
限制性定語從句不用逗號與主句分開，對所修飾的詞起特指或限定的作用，去掉後意思不完整或不太清楚。翻譯成中文時，一般把定語從句翻譯在先行詞之前。
引導限制性定語從句的關系代詞有who, whom, whose, that, which, of which和關系副詞when, where, why等。
eg. This is the man who helped me.
I was the only person in our office that was invite to the palace ball.
非限制性的定語從句和主句之間往往用逗號分開，只對被修飾的詞語或主句起補充說明的作用，去掉後對句意影響不大。翻譯時通常把定語從句翻譯在先行詞後邊，作為附加說明。
引導非限制性定語從句的關系代詞有who,whom, whose, which, as和關系副詞when, where，一般不用that 引導。
eg. I have two sisters, who are both doctors.
Last Sunday they reached Shanghai, where a meeting was holding.
定語從句的考查熱點
1.間隔式定語從句
定語從句一般緊跟在先行詞之後，但定語從句先
行詞之間有時會插入別的成分，構成先行詞與定
語從句的隔離。
eg. This is the article written by him that I spoke to you about.
He was the only person in this country that was invited.
(1). 因定語從句過長，為使句子保持平衡，通常定語從句和其所修飾的名詞或代詞分開。
eg. The film brought the hours back to me when I was taken good care of in that faraway villiage.
(2). 在定語從句中使用「插入語」以增加句子的靈活性。
eg. Kate was always speaking highly of her role in the play, which, of course, made the others unhappy.
The pen I thought I had lost is on my desk, right under my nose.
2.定語從句中的謂語動詞與先行詞保持一致。
當引導定語從句的關系代詞在從句中做主語時，定
語從句的謂語動詞的數的形式應與先行詞保持一致。
eg. I, who am your classmate, will try my best to help you.
He, who is your classmate, will try his best to help you.
注意句式：
one of + 復數名詞+關系代詞+復數動詞
the (only/very) one of +復數名詞+關系代詞+單數動詞
He is one of the students who have made great progress.
Tom is the only one of my friends who has been abroad.
Where引導的地點狀語從句 與定語從句的區別:
1.Where there is a river, there is a city.= In the place where there is a river, there is a city.
2. You should make it a rule to leave things where you can find them again.
= You should make it a rule to leave things in the place where you can find them again.
3. Go (to the place) where you like to go.
當where 引導的地點狀語從時, 可換成含有定語從句
where 引導的從句 ,等於 in /to/ at the place where
③ 定語從句怎樣用
位置：之後 例：Those who are willing toendthe party , sign your 定語從句是由關系代詞或關系副詞導的從句，其作用是作定語修飾主句的某個名詞性成分，相當於形容詞，所以又稱為形容詞性從先行詞定語句一般放在先行詞的後面.）
關系詞
引導定語從句的關聯詞稱為關系詞，關系詞有關系代詞和關系副詞。關系代詞有that, which, who, whom, whose, as等，絕對沒有what；關系副詞有where, when, why等。關系詞常有3個作用： ①連接作用，引導定語從句。 ②代替主行詞，甚至可能是主句中的一部分或者整個主句。 ③在定語 註：關系代詞有主語、賓語之分。一般whom作為賓語。關系代詞在從句中作主語，賓語，表語，定語等，關系副詞在從句中作地點狀語。
定語
定語用來限定、修飾名詞或代詞起修飾、限定作用的詞、短語（動詞不定式短語、動名詞…的』表示容詞擔任，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 被定語從句修飾的名詞、代詞稱為先行詞。如The man The book
編輯本段關系代詞引導的定語從句舉例
關系代詞所代替的先行詞是人或物的名詞或代詞，並在從句中充當主語、賓語、定語等成分。關系代詞在定語從句中作主詞保持一致。
1,who, whom, that
這些詞代替指人，whom作賓語指人，that既可作主語又可作賓語（作賓語可以省略），可以指人也可以指物。在從句中所起作用如下： (1) Is he the man who/that wants to see you? 他是那個想見你的男人嗎？（who/that在從句中作主語） (2) 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） （3）The man whom you spoke to just now is our English teacher 你剛剛說話的那個男人是我們的英語老師
2,Whose 用來指人或物
(只用作定語, 等，作賓語時可以省略，例如： (1)Prosperitywhich / that had neppearsin te. 農村出現了前所未有的繁榮。（which / that在從句中作主語） (2) The package (which / that) you are carryingis about to come unwrapped.你拿那個包裹快要散開了。(which / that在從句中作賓語） 4,a as 可以做主語，也可以作略，指人或者物。常與such as,the 5，as與which的區別 ①as可以放在 關系代詞：在句中作主語、賓語或定語 1. that既可代表事物也可代表人，which代表事物；它們在從句中作主語或賓語，that在從句中作賓語時常可省略關系詞，which在從省略。[eg：This is the book （which）you want.] 2不及物動詞+介詞」的介詞的賓語代詞wh放在它原來的位置 3. 代表物時多這時的that常被省略； c被形容詞最高級修飾時；既有人又有物時； e)整個句中前面已有which，wh行 關系副詞：在句中作狀語 關系副詞=介詞+關系代詞 why=for which where=in/ at/ on/ich (介詞同先行詞搭配) when=ring/ on/ in/ ... which (介詞同先行詞搭配) 1. where是關系代詞，當然也不用that引導。 By the time when you arrived in London, we had stayed there for two weeks. 到你到達倫敦的時候，我們在那裡已經待了兩個星期。 I still remember the her. 我仍然記得我第一次見到她。 Each time when he goes to business trip, he brings a lot of living necessities, such as towels, soap, toothbrush etc。 帶來了生活必需品，如毛巾，肥皂，牙刷等其他東西。 3. 當從句的邏輯主語是some, any, no, somebody, anybody, nobody, something, anything, everything或nothing時，常用there is 開頭 There is somebody here who wants toak to you. 這里有人要和你說話。 分作進一步說明，通常是引導詞和先行詞之間用逗號隔開，將從句拿掉後其他部分仍可成立.
編輯本段非限制性定語從句
意義: 非限制性定語從句起補充說明作用，缺少也不會影響全句的理解。在非限制性定語從句的前面往往有逗號隔開，如若將非a lovely garden.我去年買的的房子帶著個漂亮的花園。 This novel, which I have read three times, is very touching. 這本我已經讀過三遍的小說很感人。 3.非限定性定語從句可將整個主句作為先行詞, 對其進行修飾, 這時從句謂語動詞要用第三人稱單數，例如： He seems not to have grasped what I meant, which greatly upsets me.他似乎沒抓住我的意思，這使我心煩。 Liquid water changes to vapor, which is called evaporation. 液態水變為蒸汽，這就叫做蒸發。 4. 有時as也可用作關系 5. 在非限定性定語從句中，不能用關在從句中做主語 (1) The boys who are playing football are from Class One. 在踢足球的男孩們是一班的. (2) Yesterday I helped an old man who lost his way. 昨天，我幫助了一個迷路的老人.
whom指人
在定語從句中 my friend. 你剛剛見到的那個人就是我的朋友. 注意：關系代詞whom在口語和非正式語體中常用who代替，可省略。 如果在從句中做賓語,就用whom或has an English book. 他就是那個有英語書的男人.
whose通常指人也可指物
在定語從句中做定語，表所有。 (1) He has a friend whose father is a doctor. 他有一個朋友的父親是醫生. (2) I once lived in a house whose roof has fallen in.我曾經住在一座現在已經倒塌的房子中. whose指物時通常以以下結構來代替 (3) The 顏色是什麼. 足球是大多數男孩都喜歡的游戲. (2) This is the pen (which) he bought yesterday. 這是他昨天剛買的鋼筆.
that指人時
相當於who或者whom；指物時，相當於which。 在定語從句中做主語,表語或者賓語，做賓語時可省略。 (5) The number of the people that/who come to visit the city each year rises one million. 每年來這座城市觀光的遊客數目上升了100萬。 (6) Where is the man this morning? 今天早的定語從句
when指時間
在定語從句中做時間狀語也可做連接詞用 (1) I been pulled down.
why指原因
在定語從句中做原因狀語 (1) Please tell me the reason why you missed the plane. (2) I don』t know the reason why he lookswhen/in which he was going to school he began to know what he wanted when he grew up.
④ 定語從句的用法講解
定語從句是高中英語的重要語法項目之一，它的結構和用法比較復雜。我們應從哪些方面有效地復習定語從句呢？下面就是我給大家帶來的定語從句的用法講解，希望大家喜歡！
[定語從句的種類]
定語從句分為限制性和非限制性兩種。限制性定語從句是 句子 不可缺少的部分，如去掉主句意思就不完整或失去意義；非限制性定語從句是先行詞的附加說明，去掉也不會影響主句的意思。它與主句之間通常用逗號分開，一般不用that引導，關系詞不可省略。如：
This is the book that I want to read. （限制性）
Tom』s father， who arrived just now， is a famous scientist. （非限制性）
非限制性定語從句的先行詞成分可以是整個主句，非限制性定語從句常用which引導，修飾整個句子。定語從句的謂語動詞要用第三人稱單數。例如：
The weather turned out to be very good， which was more than we could expect.
關系代詞引導的定語從句
關系代詞所指代的先行詞是表示人或物的名詞或代詞，並在句中充當主語、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。
在定語從句中，who和that既可作主語又可作賓語，whom只可作賓語（作賓語時可以省略）。如：
Is he the man who/that wants to see you？ （who/that在從句中作主語）
The man （whom/who/that） you spoke to just now is our English teacher. （whom/who/that在從句中作賓語，可省略）
[whose]
在定語從句中作定語，可用來指人或物，表示物時相當於「the+名詞+of+which」或「of+which+the+名詞」。如：John， whose wife is ill， can』t come to the party.
[which & that]
which和that指代的先行詞是表示事物的名詞或代詞，在定語從句中可作主語、賓語等。如：
Please show me the radio that/which you have just bought. （that/which在從句中作賓語，可省略）
This is the film that/which created a great sensation. （that/which在從句中作主語）
只能用that而不能用which的情況：
1. 先行詞是最高級或被最高級修飾時。如：This is the best dictionary that I』ve ever used.
2. 先行詞是序數詞或被序數詞修飾時。如：The first thing that we should do is to get some food.
3. 當先行詞是anything， everything， nothing， something， few， all， none， little， some等不定代詞時，或是由every， any， all， some， no， little， few， much等詞修飾時。如：Tom told his father all that had happened.
There is little that I can do for you.
4. 先行詞既有人又有物時。如：They talked about the teachers and the schools that they knew.
5. 先行詞被the only，the very，the right等修飾時。如：This is the very book that I want to have.
6. 在which，who，whom引起的問句中，為避免重復。如：Who is the girl that talked to you yesterday？
7. 關系代詞在定語從句中作表語時。如：China is not the country that it was.
只能用which，不能用that的情況：
1. 在非限制性定語從句中。如：Beijing， which is the capital of China， has a very long histroy.
2. 在介詞後面，即「介詞+which（指物）」。如：This is the house in which we lived three years ago.
[as]
關系代詞as代替的先行詞是人或物的名詞， 在從句中作主語、賓語和表語。
as引導限制性定語從句時，常和such， the same， as（so）連用， 構成such ... as， the same ... as， as/so ... as等結構，在從句中可作主語、賓語和表語。如：
Don』t trust such men as praise you to your face. （在定語從句中作主語）
I have the same trouble as you have. （在定語從句作賓語）
It』s as pleasant a film as I have ever seen. （在定語從句作賓語）
但是當先行詞被the same修飾時，that也可以引導定語從句，但意義有所不同。the same ... as（指同樣或同類的）， the same ... that（指同一個）。例如：
This is the same watch as I lost.
This is the same watch that I lost.
as也可單獨使用，引導非限制性定語從句，修飾整個主句或主句中的一部分，放在句首、句中或句末。如：
As is known to us all， smoking is harmful to one』s health. （指代整個主句，在從句中做主語）
He is late， as is often the case. （指代整個主句，在從句中做主語）
Light， as everybody knows， travels much faster than sound. （指代整個主句，在從句中做賓語）
as和which作關系代詞的用法比較：
which引導的非限定性定語從句只能放在主句之後，which指代前面的一個句子或主句中的某一成分；as引導的非限定性定語從句能放在主句之前、中、後，既可指前面已經提到的情況，也可指後面提到的情況。
as引導從句時，有「為人所熟知」的含義，which則沒有這層意思。as引導的從句往往表示的是一種附加說明，which引導的從句一般是較為重要的陳述。如：
His mother is ill， which makes him very sad.
As is expected， the England team won the football match.
[關系副詞引導的定語從句]
關系副詞when， where， why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， 相當於「介詞+which」結構。例如：
I』ll never forget the time when/ring which we worked in the factory.
This is the village where /in which he was born.
I don』t know the reason why/for which she looks unhappy today.
[判定用關系代詞還是用關系副詞]
關系代詞與關系副詞的選用，應看先行詞在定語從句中充當什麼成分：若作主語、賓語或定語，則用關系代詞who，whom，that，which，whose，as等；若作狀語， 就用where， when， why等關系副詞。如：
The reason why I』m writing is to tell you about a party on Sunday. （狀語）
The reason that/which he gave us sounded reasonable. （賓語）
Pisa is a city， which has a leaning tower. （主語）
Pisa is a city， where there is a leaning tower. （狀語）
[介詞+關系代詞]
當關系代詞作介詞賓語時，就出現了「介詞+關系代詞」的結構引導定語從句的現象。當先行詞指物時用「介詞+which」，指人時用「介詞+whom」，且關系代詞不能省略。而這種結構中較難解決的問題是介詞的選擇問題：
1. 介詞的確定可以根據整個句意來確定。
Oxygen is a kind of gas， without which we couldn』t live.
2. 介詞可以根據與先行詞的搭配來確定。
He gave me the book for which he paid a lot of money. （動詞與介詞搭配）
1949 was the year in which the P.R.C. was founded. （名詞與介詞搭配）
The snake， of which she used to be afraid， is her favorite animal now. （形容詞與介詞搭配）
定語從句的用法講解相關 文章 ：
1. 英語中as引導的定語從句的相關講解
2. 定語從句中關系詞的用法講解
3. 英語定語從句的用法
4. 英語數詞的分類和用法
5. 高中英語語法知識總結:定語從句
6. 考點初中英語定語從句的用法
7. 非限制性定語從句的用法講解
8. 英語語法:定語從句
9. 定語從句語法知識點匯總