當前位置

首頁 > 英語詞彙 > 英語單詞 > before的用法總結

before的用法總結

推薦人: 來源: 閱讀: 3.06W 次

以下是小編爲大家總結的before的用法,希望能幫助大家更好地掌握before的用法,提高英語水平。

before的用法總結

 before的用法總結

1 作介詞

A.指時間.在……以前. e.g. It began to rain before midnight .

B. 指位置.在……面前. e.g. They knelt before the king .

C. 指順序或排列在前面. e.g. You name comes before mine on the list .

  2 作連詞

A.在……之前. e.g. Did she leave a message before she went ?

B.用於It + be +時間段 + before :在……之後才……  e.g. It willl be five years before I come back .

3 常於情態動詞 can / could 連用 : 還沒來得及……就……

e.g. Before I could say a word , she had rushed out of the room

  掌握before熱點用法

1. prep. 在......以前,強調時間

He came to see me the day before yesterday. 他前天來看我了。

2. prep. 在......前面,當着......的面,向......,強調地點

She has to appear before the court. 她必須出庭受審。

3. prep. 在......之前,先於,強調次序

Those with babies can get on the bus before others. 帶小孩的人可以先上汽車。

4. prep. 與其......(寧願)

I'd shoot myself before I apologized to him! 我寧死也不向他道歉!

5. adv. 以前,強調時間

We've seen that film before. 我們以前看過那場電影。

6. adv. 在前面,向前,強調位置

Don't run before and after. 別跑前跑後。

7. conj. 在......前,強調時間

before的含義比較靈活,實際翻譯時應結合具體情況機動處理。

1. 趁......

You should do it before it is too late. 趁現在還不算太晚,你應該趕快做它。

2. 尚未來得及

Before she could move, she heard a loud noise, which grew to a terrible roar. 她還沒有來得及動彈,就聽見有很響的聲音,接着就成了可怕的隆隆轟鳴聲。

Before they reached the house, a new great wave came, sweeping down trees, and sweeping them down too. 他們還沒到屋子,又一個巨浪打來,衝倒了樹,也衝倒了他們。

3. 要......先......

You should be a pupil before you become a teacher. 要當老師,先作學生。

  二、掌握熱點句型用法

It was not long before...(過去)沒過多久就......

It was not long before he returned to Beijing. 不久他就回到北京。

需要特別注意,該句型可以進行創新,可將否定句改爲肯定句(It was long before...過了很久才......)或將一般過去時改爲一般將來時(It will not be long before...要不了多久就......;It will be long before...要過很久才......)。before在這些句型中均引導時間狀語從句, long這個抽象的時間也可改爲years, weeks, days等具體表時間的詞。

It was long before he married Wei Fang. 過了很久他才娶魏芳。

It will be long before he goes abroad. 要過很久他纔出國。

Will it be years before he goes to school? 要過好幾年他才能上學嗎?

高考題例:

It ________ long before we ________ the result of the experiment.

A. will not know B. know C. will not D.

【析】正確答案爲C。該句面意思爲:在我們知道實驗結果之前不會過很長一段時間,也就是不會過很長一段時間我們就會知道實驗結果。應使用It was not long before的創新句型It will not be long before,before引導時間狀語從句時,從句應用一般現在時代替一般將來時。

Scientists say it may be five or six years ________ it is possible to test this medicine on human patients.

A. since B. after C. before D. when

【析】正確答案爲C。該句型也是It was not long before的創新句型。

when與befor的區別

本文結合典型例題來歸納一下before的特殊用法。

before作爲連詞時的基本意義是“在……之前”,用於表示時間或順序。如:Turn the light off before you sleep. (睡前先把燈熄掉。) Think before you speak. (說話之前,應先想清楚。) 但在不同的語境中before有不同的意義:

1. before表示“不等……就……”、“尚未……就……”

例1: —Why didn’t you tell him about the meeting? (2006年四川)

—He rushed out of the room I could say a word.

A. before B. until C. when D. after

解析: 答案爲A。題中before意爲“不等……就”、“尚未……就……”,它表示從句的動作尚未來得及發生,主句的動作已發生或完成。全句句意爲:我還沒來得及說他就衝出了房間。又如:

Before I could get in a word, he had measured me. 我還沒有來得及插上話,他就給我量好了尺寸。

The phone stopped ringing before I answered it. 我還沒有來得及接,電話就掛了。

2. before表示“不知不覺,還沒弄清就……”(常用於before sb. know/realize…)

例2: Several weeks had gone by I realized the painting was missing. (2004全國)

A. as B. before C. since D. when

解析: 此題最易錯選C或D項,而正確答案爲B。用since則時間延續到了現在,在時間上與had gone矛盾;用when則無法強調時間流逝的不知不覺性。又如:

Time passed quickly and three months went by before I knew it. 時間飛快地流逝,不知不覺3個月過去了。

3. before表示“以免,不然”

例3: It’s cloudy. Take an umbrella you regret it.

A. but B. and C. after D. before

解析: and及but表示並列關係,不合語境;after意爲“在……之後”,不合常識,應是在下雨前帶傘;before在此處意爲“以免你後悔”。before作此意義的用法的例子不少,又如:

Put that away before it gets broken. 把它收好,以免砸了。

Do it before you forget. 儘早動手,不然忘了。

4. before用於it was / will be + 時間 + before ... 句型中。

例4: It won’t be long you regret what you have done.

A. after B. before C. since D. until

解析: It was / will be + 時間 + before ... 表示“過了多久才…(強調時間的長)”,在否定句中則表示“沒過多久就…(強調時間的短)”。例如:

It will be two years before we meet again.我們要過兩年才能見面。

It wasn’t long before he married again. 不久他就又結婚了。

We didn’t wait long before he came back. 我們沒等多久他就回來了。

5. before表示“與其……寧可……,比……優先”(用於表優先順序)

例5: They would fight to death they surrendered(投降).

A. before B. after C. since D. because

解析: 答案爲A。before引導的從句在與will, would連用時,有“寧願……也不”的含義。before即使是作介詞用也有此意義。例如:

True men choose death before dishonor. 大丈夫寧可殺不可辱。

I’d die before I apologize to them! 我寧死也不願向他們道歉!

We will die before we give in. 我們寧死不屈。

6. before表示“……才”(強調從句動作發生得晚或慢)

例6: They sailed along the Pacific Ocean for two weeks they arrived home.

A. since B. when C. before D. after

解析: 此題正確答案爲C。全句句意爲:“他們在太平洋航行了兩個星期纔回到家。”強調從句動作比主句動作發生晚。又如:

I thought carefully about it before I made a decision. 我經過再三考慮才決定。

It may be many years before the situation improves. 或許要過很多年這種狀況才能得到改善。

下面有一道2003年的高考題:

Don’t be afraid of asking for help ____ it is needed.

A. unless B. since C. although D. when

本題答案爲D,考查when作連詞的用法。此處when相當於if,意爲“如果,要是”。

  下面我們來歸納一下when 的用法:

1.作疑問副詞,意爲“什麼時候,什麼場合”。如:

I don’t know when he died.

我不知道他何時去世的。

Since when has he been missing?

他是從什麼時候失蹤的?

2.作關係副詞,引導定語從句。如:

He came at a time when we needed help.

他在我們需要幫助的時候來了。

We’ll never forget the day when we joined the Party.

我們永遠不會忘記我們入黨的那一天。

3.作連詞,引導時間狀語從句。如:

①表示“當……的時候”、“無論什麼時候”、“一……的時候”之意。如:

It was raining when we arrived.

我們到的時候天正在下雨。

When I was a boy, I used to go to the Western Hills on Sundays.

小時候,我經常在星期天到西山公園去玩。

It is cold when (whenever) it snows.

一下雪天就冷。

He joined the PLA when (as soon as) he returned home.

他回家後就參了軍。

②意爲“可是,然而,既然,考慮到”。如:

How can they learn anything when they spend all their spare time watching television?

他們把所有的空閒時間都用來看電視了,還能學什麼東西呢?

They have only three copies when we need five.

他們只有三本,可我們需要五本。

The waitress brought me coffee when I asked for tea.

雖然我叫了茶,女服務員卻拿了咖啡給我。

③ 意爲“如果,要是”。如:

You shall have the apple when you say “Please”.

你要是說“請”,這蘋果就是你的。

He will likely recover when he undergoes the operation.

如果動手術的話,他可能會復元。

When he receives the letter, he’ll tell us.

他要是收到信就會告訴我們的。

I’ll do that when necessary.

有必要我就會那樣做。

How can you hope for mercy yourself when you show none?

如果你不寬恕別人,你自己怎能希望得到別人的寬恕呢?

④引導並列分句總是置於另一分句之後,不可前置,相當於and just at the time。如:

I was just about to go swimming when luckily our guide saw me and shouted at me.

我正要去游泳,這時我們的導遊看見我並對着我喊叫。

We were watching TV, when suddenly the light went out.

我們正在看電視,燈突然熄了。

by 與 before

當英譯終止時間時,比如“在某月某日之前”,如果包括所寫日期時,就用介詞 by;如果不包括所寫日期,即指到所寫日期的前一天爲止,就要用介詞 before。

例如:賣方須在 7 月 15 日前將貨交給買方。  The vendor shall deliver the goods to the vendee by July 15.(or: before July 16,說明含 7 月 15 日在內。如果不含 7 月 15 日,就譯爲 by July 14 或者 before July 15。

只能用於過去時,放在表示“時間段”的詞語之後,表示從現在算起的一段時間之前,如:

His father died five years ago.

(他的父親5年前去世了。)

re後接“時間點”,可用於任何時態,如:

She got to his office before 5 o’clock.

(她5點鐘以前就到了辦公室。)

We hope to get home before six o’clock .

(我們希望6點鐘前回到家。)

  注意:

(1)before單獨使用,常與現在完成時連用,也可與一般過去時連用,如:

I have never met him before.

(我以前從未見過他。)

I never met him before.

(我從未見過他。)

(2)before也可放在表“時間段”的詞語後,與過去完成時連用,表示從過去某時刻算起的若干時間以前,如:

在歷年的高考中,狀語從句是單項填空部分的熱點和重點。同時,由於狀語從句的種類繁多,因此也是高中英語教學的難點。縱觀近幾年的全國高考試題,考查的重點仍是考生容易混淆的近似連詞的用法,試題結構趨向複雜,設問的角度也趨向多樣化。

1、做狀語從句題目時一定要思維清晰。關鍵是要把握分句間的邏輯關係,做出正確的選擇。

2、要具備相應的狀語從句的知識,熟悉連接詞的意義和語用特徵。如as, since, when, before, while 等不易掌握的詞。

對於狀語從句考點來說,辨析從句的連接詞是考查得最多的知識點。作好這類題目的關鍵是要熟練掌握各個連接詞或短語的具體含義,尤其是同一個詞用於不同語境,不同類型狀語從句中的具體意義。

考點1:when引導的狀語從句

【例題1】(05-上海-34)He transplanted the little tree to the garden ______ it was the best time for it.

e l

【例題2】(05-福建-24)---Did Jack come back early last night ?

---Yes. It was not yet eight o'clock ______ he arrived home.

re l

【例題3】(06-湖南-31)I had just stepped out of the bathroom and was busily drying myself with a towel ______ I heard the steps.

e e r

【例題4】(06-山東-31)How can you expect to learn anything ______ you never listen ?

case if ss

【例題5】(06-遼寧-24)He was about halfway through his meal ______ a familiar voice came to his ears.

e

e

【例題1】(05-上海-34)考查特殊意思 此處when=since; considering that 既然;考慮到。句意:考慮到這是移種小樹的最好時機, 他把那棵小樹移植到了花園。

【例題2】(05-福建-24)考查基本意思 句意:當他到家時還不到八點。注意下面幾句話:

It is five years since he left school. 他畢業5年了。

It was five years ago that he left school. (強調句型) 5年前他畢業了。

It was five o'clock when he left home. 當他離開家時是5點鐘。

It was five years before he left school. 5年後他才畢業。

同學們在做題時要注意不同的連接詞在類似結構中,句意完全不同。

【例題3】(06-湖南-31)句意:我剛走出浴室, 正忙着用毛巾擦身體, 就在這時我聽到了腳步聲。when此時用作並列連詞,意思是“正在此時、正在那時”。

【例題4】(06-山東-31)考查特殊意思 句意:既然你從來不聽,又怎能指望學到東西呢?when: conj. considering that 既然,考慮到。再比如:Why do you want a new job ______ you've got such a good one already? A 選項 in case (萬一、以防);B選項even if(即使);C選項unless(除非,如果不),不符合本題要求。

【例題5】(06-遼寧-24)題乾的意思是“飯剛剛吃到一半的時候,______他聽到一個熟悉的聲音。when此時用作並列連詞,意爲just at that time,when此意義常見句式:be about to do …when…/be on the point of doing…when…(正要做某事就在這時)/ be doing…when …(正在做某事就在這時)

考點小結---when 的用法

1、當……時候參看【例題2】解析

2、since; considering that 既然;考慮到,參見【例題1】&【例題4】

3、並列連詞,意爲at that time, 參看【例題3】&【例題5】解析

4、句型:when it comes to …要是提到,要是提及…eg. When it comes to tennis, I know nothing about it.

考點2:while引導的狀語從句

【例題1】(06-全國I-13)We thought there were 35 students in the dining hall, ______, in fact, there were 40.

e her h

【例題2】(06-天津-2)The cost of living in Glasgow is among the lowest in Britain, ______ the quality of life is probably one of the highest.

e e

【例題3】(07-四川-29)I'd like to study law at university ________ my cousin prefers geography.

gh e

【例題4】(06濟南2月模考) ______ your opinions are worth considering, the president finds it unwise to place too much importance on them.

e e

【例題5】(07湖南師大附中檢測)______ there are many different interpretations of our body language, some gestures seem to be universal.

e

【例題6】(07瀋陽質檢)---Is there any place where we can listen to some music?

---There is a teahouse where you can enjoy classical music, ______ having some Chinese tea or other soft drinks.

e ss e

【例題7】(07-山東-29)______ I really don't like art, I find his work impressive.

e e

【例題1】(06-全國I-13)句意:我們原以爲在餐廳裏只有35名學生,然而實際上卻有40人。此題主要考查while並列連詞的用法,表示對比或轉折,意爲:而,然而,其中in fact 是關鍵詞。

【例題2】(06-天津-2)題幹中有兩個明顯的信息點,即“lowest”和“highest”, 可判斷兩個分句之間屬轉折關係,比較可知,只有while可表示“而,然而”。

【例題3】while用法同上。

【例題4】(06濟南2月模考) while引導讓步狀語從句,相當於although 儘管

【例題5】(07湖南師大附中檢測)同上

【例題6】(07瀋陽質檢)考查while的基本用法: during the time that;at the same time as … 在…期間;與…同時

【例題7】(07-山東-29)while引導讓步狀語從句,although 儘管

考點小結——while 的用法

1、 在…期間;與…同時 ,考查基本意思 【例題6】

2、並列連詞表示對比或轉折,意爲:而,然而【例題1】、【例題2】&【例題3】

3、while引導讓步狀語從句,相當於although 儘管【例題4】、【例題5】&【例題7】

4、引導條件狀語從句,while: as long as 只要 eg. You will succeed sooner or later while you don't lose heart. 只要你不失去信心, 你遲早會成功。

考點3:before引導的狀語從句

【例題1】(07-江西-29)He was told that it would be at least three more months ___he could recover and return to work.

re e

【例題2】(06-四川-35)---Why didn't you tell him about the meeting?

---He rushed out of the room ______ I could say a word.

re l r

【例題3】(05-廣東-30)The American Civil War lasted four years ______ the North won in the end.

r re

【例題4】(03-北京-30)He made a mistake, but then he corrected the situation ______ it got worse.

l re

【例題5】(06-合肥第二次質檢)I had not believed in falling in love with somebody at first sight ______ I met David on Valentine's Day three years ago.

ss re

【例題1】(07-江西-29) 題幹中at least three more months 是一段時間,時間段+before…表示“過了多久……才……;要過多久…… 就……”句意爲“他被告知至少將在三個多月後他就能康復並重新工作” 。

【例題2】(06-四川-35)句意:----爲什麼不告訴他會議的事?----我還沒有來得及說一句話, 他就衝出了房間。before:在此題中的意義是“不到……就;還沒有……就”

【例題3】(05-廣東-30)句意:“美國南北戰爭持續了四年,北方纔最終取得勝利。”before用法同【例題1】(07-江西-29)

【例題4】(03-北京-30)句意:他犯了一個錯誤,但後來他就及時扭轉了形勢以免它更加惡化。before:在此題中的意義是“以免,免得”

【例題5】(06-合肥第二次質檢)此題考查before的基本意義:“在……之前,在……以前”

考點小結——before 的用法

1、在……之前,在……以前 ,考查基本意思 (參看【例題5】解析)

2、時間段+before…表示“過了多久……才……;要過多久…… 就…… ”

參看【例題1】&【例題3】解析

拓展:這個結構通常也用於下面的句子:

1)It won't be long before …/ It wasn't long before…示“不久就……”

eg. I hope it won't be long before we meet again.

=I hope we'll meet again before long. 希望不久我們會再相見。(注意long before與before long的區別)

2)had not done… before… 表示“還沒…… 就……”

eg. I had not gone a mile before I felt tired. 我還沒走上一英里就疲倦了。

3)eg. It was 3 years before he passed the driving test. 過了三年他才通過駕照考試。

It is 3 years since he passed the driving test. 他通過駕照考試三年了。以上兩句話要區別主從複合句的時態和兩句話的不同含義。

3、還未、不到……就;還沒有……就 ,參看【例題2】解析

4、以免,免得 參看【例題4】解析 eg. Put down the telephone number before you forget it. 把電話號碼記下來,免得忘了。(不能譯成:“在你忘記之前,把電話號碼記下來。”)

以上是對幾個重點連詞的小結,解題時可觀察前後句的關係而定,或把選項一一套入原題,看哪個讀着通順,邏輯清楚,哪個就是正確答案,也就是說,一定要遵循“意思先行”原則。

歡迎同學們參與有獎答題,答題方式:登錄本報官方網站——海力網 ,點擊位於首頁上方第二行第三個的《有獎考場》參與答題。每週四15時前,全部答對的前5名同學,每人將獲得本報提供的獎品音樂杯一個。(其他答題方式無效)。

1.下列各句中,括號內的詞語使用恰當的一項是( )

A.對魯輝的瞎摻和,大家[分外]不高興。於是,原來熱熱鬧鬧的聚會一下子變得冷冷清清。

B.一個企業要擺脫困境,就必須在激烈的市場競爭中大膽改革,勇於創新,克服[舉棋不定]的保守思想。

C.洪水沖垮了李老伯的房子,全村人都很難過,村前村後,[哀鴻遍野]。

D.俗語說,[一個巴掌拍不響],以黎問題鬧成今天這樣的局面,主要的責任是黎巴嫩真主黨,但以色列也有責任。

2.下列各句中,沒有語病的一句是( )

A.商場保安員的職責是保護商場的貨物安全和環境安全,不是執法機構,擅自打人和搜身行爲屬於執行公務過程中侵害他人權利的行爲。

B.以色列軍方負責人22日稱,以色列已向黎邊境派遣了數百輛坦克、裝甲車和軍用車輛。

C.如今的手機不再是通訊工具,而成爲人們日常生活的貼身伴侶,用來盡情表現個人品位。

D.巴西隊的小羅納爾多,這個名字對一般人可能還有些陌生,可對球迷來說卻是再熟悉不過了。

3.____ worries me the way he keeps changing his mind.

4、- Excuse me, I want to have my watch fixed, but I can’t find a repair shop.

- I know _______ nearby. Come on, I’ll show you.

A. one B. it C. some D. that

--------------------------------------------------------------------------------------

before的用法