before long与long before的区别
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before用法知多少?在高考中,状语从句是每年高考单项填空部分必考的题目之一,考查的重点是考生容易混淆并且近似的连词在逻辑行文和语篇结构中的使用。
before作连词的用法一直是高考的重点,也是学生感觉掌握起来比较头疼的地方。
下面选取近几年各省市的高考试题进行归纳分析,使考生通过典型实例,把握高考对before所引导的句型的命题规律,帮助同学们更好地解答此类题目。
1. before作为连词时的基本意义是“在……之前”,用于表示时间或顺序。
You can’t borrow books from the school library ______ you get your student card. (2009上海,32)A. beforeB. ifC. whileD. as【解析】选A。
考查连词,该句的意思是:在你得到你的学生卡之前你不能从学校图书馆借书。
before表示先后顺序。
2. 表示“过了多久才……”,说明主句的持续时间比较长而从句的动作缓缓来迟。
(1) The American Civil War lasted four years _______ the North won in the end. (2005广东,30)A. afterB. beforeC. whenD. then【解析】选B。
本题考查连词before表示“在多久之后才……”的用法,根据本句含义“美国南北战争持续了四年,北方才最终取得胜利”,可知本题应选B。
(2) Several weeks had gone by I realized the painting was missing. (2004宁夏,39)A. asB. beforeC. sinceD. when【解析】选B。
before表示“过多久才……”。
句意:几个星期已经过去了,我才意识到油画丢了。
内含的意思是油画丢了好几个星期了,我才意识到。
3. 表示从句动作还没来得及发生或完成,主句动作就已经发生或完成了,意为“尚未……就”,“没来得及……就”,常用于before sb. can/ could…。
before long与long before的区别1.before long的意思是“不久,很快”。
(用于一般将来时或一般过去时)①I'll be back before long. 不久我就回来。
(一般将来时)②Before long he got married. 不久他就结婚了。
(一般过去时)2.long before有两个用法:(1)老早,早就(单独使用,表示比过去某时早得多的时间。
用于过去完成时)①She had left long before. 她老早就离开了。
(过去完成时)②That had happened long before. 那事老早就发生了。
(过去完成时)I met him long ago. 我很久以前就认识他了。
(一般过去时)不久前,在辽宁省的朝阳县新发现了一种罕见的、形状像鸟一样的恐龙。
(2)在……的很久以前,在还没有……的很久以前。
如:①She had left long before his return [he returned]. (过去完成时)在他回来的很久以前她就走了。
②He had worked in the factory long before he got married. (过去完成时)在他还没有结婚的很久以前他就在这家工厂工作了。
This happened long before you were born. 这事在你还没出生以前很久就发生了。
3.区别以下句型:(1)It is [was, will be] long before…“在……前需要很久”,“费时间……才……”。
费了很长时间我们才知道计划错在哪里。
(2)It is / was not (won't be) long before… “不久就……”,还未。
就①It won't be long before you get well.你不久就会康复的。
(注意在before从句里用一般现在时代替将来时)②It won't be long before we see each other.不久我们又会见面的。
before的用法是很多的人都比较想要了解的,在众人的心中before的用法是比较难的,我们都非常想要去了解before的用法,但是又谈何容易呢为了让大家更加快速的了解before的用法,下面我们就和教师一起去看看吧,希望对大家有所帮助。
prep.在……之前;先于,优于;当着……的面;与其……conj.在……之前;在……以前;比……早些;与其……adv.先前,从前;在前,在前方before一词含义广泛,是高考考查的热点词汇之一,但部分考生对该词的用法模糊不清。
为了帮助大家掌握,现就对before的用法归纳如下:一、 before用作连词1. before用作连词时,意思是“在……之前;还没来得及…… 就”。
强调主句或从句谓语动词表示的动作发生得过早或过快?例如:Before she could move, she heard a great noise, which grew to a terrible roar. 她还没来得及动弹,就听见有很响的声音,接着就成了可怕的隆隆轰鸣声。
Before I could say a word, she had stormed out of the room. 不等我说一句话,她就冲出了房间。
Don’t count your chickens before they are hatched. 不要高兴得过早。
I must finish my homework before I watch TV.我必须做完作业才能看电视。
It still took seven years before they finally got married.?过了七年他们才最终得以成婚。
It will be only a few minutes before she comes back.?她过几分钟就会回来。
He announced the ending of the meeting before I could get in a word.?没容得我插上一句话,他就宣布散会了??Someone called me up in the middle of the night, but they hung up before I could answer the phone.有人半夜给我打电话,但我还未来得及接他就把电话挂断了??They had talked only a few minutes before they found they were quite different in opinion.他们才谈了几分钟就发现他们的意见很不一致??注意:before从句若是一个将来的动作,则用一般现在时代替一般将来时,如上句中的comes。
before句型辨析与解析It + will be + 时间段+ before等表示“在……之后……才”的句型总结一、用于句型“It + will be + 时间段+ before...”句型中,表示“要过多久才…”,也可用于“It + may be + 时间段+ before...”,表示“也许要过多久才……”。
Before 后的句子中用一般现在时态。
其否定形式“It will/would not be +时间段+ before…”表示“不久就……,过不了多久就……”。
(1)The field research will take Joan and Paul about five months; it will be a long time _____ we meetthem again.A. afterB. beforeC. sinceD. when(2)—How long do you think it will be ______China sends a manned spaceship to the moon?—Perhaps two or three years.A. whenB. untilC. thatD. before(3)It ________ long before we _______ the result of the experiment.A. will not be...will knowB. is...will knowC. will not be...knowD. is...know(4) Scientists say it may be five or six years_________ it is possible to test this medicine on human patients.A. sinceB. afterC. beforeD. when解析:答案为BDCC。
Before用作连词时,意思是“在……之前”。
(注:此为核心概念,其它皆是繁衍派生之义)其实,它引导状语从句时,在不同的句式中以及汉英表达习惯的不同,before含有不同的含义和用法。
(注:翻译意思不同而已)。
(注:当主从句动作有先有后的时候,用before,after居多,但其他的呢?居多是多少?有什么使用条件?)(最容易错的就是和when难以区分,这主要是受到中文翻译法的影响,但如何辨别?)从历年的高考试题可以看出,before是高考考查的热点词汇之一。
为了帮助大家掌握,现就对它的用法归纳如下:一、表示“在……之后……才”。
副词“才”在汉语中强调某事发生得晚或慢。
如果在含有before从句的复合句中,强调从句动作发生得晚或慢时,就可以应用这种译法。
【典型考例】The American Civil War lasted four years _______ the North won in the end.(2005广东)A. afterB.before C.when D. then解析:答案为B。
本题考查连词before表示“在……之后才……”之的用法,根据本句含义“美国南北战争持续了四年,北方才最终取得胜利”,可知本题应选B。
(注:这种题目比较难,因为学生如果用中文翻译成“当”when的时候,句子也读得顺,如果来明显区分?)二、表示“……还没来得及……就……”。
目的在于强调从句动作发生之前,主句动作已发生。
【典型考例】—Why didn't you tell him about the meeting? ( 2006四川卷)— He rushed out of the room _________ I could say a word.A. beforeB. untilC. whenD. after解析:答案为A。
本题考查连词before表示“……还没来得及……就……”的用法。
句意是“我还没来得及说一句话,他就冲出了房间”。
before long和long before的区别
longbefore与beforelong区别:用法不同;意思不同。
1.Before long意为“不久以后”,相当于“soon”,作时间状语。
“before long”体现将来时态,是“不久以后、在短时间内、曾几何时”的意思,常与将来时、过去时态连用。
“long before”是“很久以前”。
体现过去时态,“long before”相当于“long long ago”,体现比过去某时早得多的时间,常用于过去时或过去完成时。
2.before long 和long before 是意思完全不相同的两个词组。
before long是介词短语,意为“不久以后”、“不久”。
如:I hope to see you before long。
我希望不久能再见到你。
long before:它单独使用时是副词短语,表示“很久以前”。
如:I saw the film long before。
我很久以前就看过这部电影。
3.before long不久以后,long befor很久以前,区别在于两者表示的时间差别。
before long和long before的解析如下:
Before long
释义:行将,不久,很快。
语法:表示“某事件的若干时间以后”时,应是“若干时间after事件”,而不是“after若干时间of事件”。
Long before
释义:很久以前。
精心整理before的用法是很多的人都比较想要了解的,在众人的心中before的用法是比较难的,我们都非常想要去了解before 的用法,但是又谈何容易呢?为了让大家更加快速的了解before的用法,下面我们就和教师一起去看看吧,希望对大家有所帮助。
现就对及eroar.她还没来得及动弹,就听见有很响的声音,接着就成了可怕的隆隆轰鸣声。
BeforeIcouldsayaword,shehadstormedoutoftheroom.不等我说一句话,她就冲出了房间。
Don’tcountyourchickensbeforetheyarehatched.不要高兴得过早。
ImustfinishmyhomeworkbeforeIwatchTV.我必须做完作业才能看电视。
Itstilltooksevenyearsbeforetheyfinallygotmarried.?过了七年他们才最终得以成婚。
一致注意:before从句若是一个将来的动作,则用一般现在时代替一般将来时,如上句中的comes。
2.用于It+be+时间段+before...句型中,意思是“在……之后才……”。
例如:ItwillbefiveyearsbeforeIcomeback.我五年后才能回来。
Itwasnotlongbeforetheenemywasdrivenoutoftheircountry.不久之后,敌人就被赶走了。
如果主句中用否定式,则表示“不多久……就”。
Itwon’tbelongb eforetheyunderstandeachother.他们不久就他之前”(1成(2Ladiesbeforegentlemen.女士优先。
(3)表示位置,与behind相对(相当于infrontof)。
如:BeforeLucyisLily.?莉莉在露茜的前面。
Don’tputthecartbeforet hehorse.不要本末倒置。
(4)表示“在……面前;与……面对面”。
一、易错点之易混淆的形近词组1.In front of和in the front of解析:In front of强调在范围外的前面; 而in the front of指在范围内的前面。
例如:The boy sits in the front of the classroom.男孩坐在教室前面。
(这里强调是在教室里面的前排位置)The girl stands in front of the room.女孩站在房间的前方。
(强调在房间外面的前方位置)2.in place of和in the place of解析:in place of代替,等同于insted of; 而in the place of表示在...地方例如:We use gas in place of coal in cooking.我们用煤气代替煤作饭.A new building is being built in the place of the old one.一座新的建筑物正在原来所在建筑物的地方被建。
3.No more than和not more than解析:no more than表示仅仅,只有,相当于only,理解为不多;而not more than表示至多,不超过,小于的意思。
例如:He is no more than an ordinary English teacher. 他只不过是个普通的英文老师。
He has not more than three children. 他最多3 个孩子(有或许还不到三个)4.On earth和on the earth解析:两者都有在地上,在地球上的意思,但on earth还有到底,究竟的意思;On the earth只是单纯的表示在地上,在地球上例如:where on earth did you spring from?你究竟从哪里冒出来的?What if there was no lead on the earth at all?如果地球上根本就没有铅这种物质怎么办?5.At all和after all解析:at all表示根本,全然的意思,常用短语not at all表示一点也不;after all表示到底,毕竟的意思例如:I don't know him at all. 我根本不认识他。
初中英语相似(易混)短语辨析(一)1.a bit ;a little【辨析】两者均可作程度状语,修饰形容词或副词,常可换用。
如:He came herea little (a bit)early.他来的有点早。
a little可用作形容词,直接修饰不可数名词,abit则不能,但可与of构成短语,其功能与a little相似。
如:Give me a bit of (=alittle)milk ,please.请给我一点牛奶。
注意:not a little(much)“很多”,“不少”;not abit (=not at all)意为“一点也不”,“一点儿也没有”。
『练习』用a little a bit填空①He is_______ taller than Tom.②There is ______water in the glass.Keys:①a bit②a bit/a little③a little/a bit of2.a few ;a little【辨析】这两者均可表示“一点(儿),一些”。
但a few修饰可数名词,而a little修饰不可数名词。
『练习』用a few a little填空①He knows______English.②I am going to buy ______apples.Keys;①a little②a few3.afraid ofafraid to;afraid for(about)【辨析】afraid of---意为“害怕;忧虑;担忧”,后可接名词、动名词或从句,它着重强调对可能产生的后果担忧或忧虑。
如:She was afraid of walking her husbandup.她担心会吵醒她的丈夫。
afraid to ----意为“害怕,不敢”,后接原形动词,它着重指不敢或害怕去做某事。
如:I am afraid to see him,我不敢见他。
afraid for (about)意为“替某人(事)担心”,其后接人或事。
高考英语常考句式——it is +时间 + since (before, when)…请注意以下三个句式的区别和意思上的差异(其中的 is 根据情况可以有其他时态形式):It is + 时间段 + since…的意思是“自从……以来有一段时间了”。
It is + 时间点 + when…的意思是“当……的时候时间是……”。
It is + 时间段 + before…的意思是“在……之前有一段时间”。
请看以下用例:It’s ten years since they got married. 他们结婚到现在已经十年了。
It was past one o’clock when he came in. 他回来时已经一点多了。
It won’t be long before they understand each other. 过不了多久他们就会互相了解的。
有时翻译可以比较灵活:It’s a long time since I met you last. 好久不见了。
(直译:自上次见到你以来有很长一段时间了。
)It’s about three years since I last played basketball. 我差不多有三年没有打篮球了。
(直译:自从我上次打篮球以来已差不多有三年了。
)请看有关高考题(答案为DDBCDC):1. That was really a splendid evening. It’s years _________ I enjoyed myself so much. (安徽卷)A. whenB. thatC. beforeD. since2. It was some time _________we realized the truth. (山东卷)A. whenB. untilC. sinceD. before3.—Did Jack come back early last night?—Yes. It was not yet eight o’clock _________he arrived home. (福建卷)A. beforeB. whenC. thatD. until4. Scientists say it may be five or six years _________it is possible to test this medicine on human patients. (福建卷)A. sinceB. afterC. beforeD. when5. It was evening we reached the little town of Winchester. (天津卷)A. thatB. untilC. sinceD.before6. It _________ long before we _________ the result of the experiment. (上海春)A. will not be; will knowB. is; will knowC. will not be; knowD. is; know【全真模拟训练】1. It was about midnight _________ we found the lost child, crying under a tree.A. thatB. untilC. whenD. where2. It's some time _________ I have spoken to you about this matter.A. thatB. unlessC. sinceD. until3. It was ten _________ he stood at aunt’s door and rang the bell.A. whenB. untilC. sinceD. that4. I think it won’t be long _________ they understand each other.A. whenB. untilC. sinceD. before5. How pleased I am tonight! It’s years _________ we had so great a time together.A. whenB. thatC. beforeD. since6. It was some time _________ we realized how important the matter is.A. whenB. untilC. sinceD. before7.—Did you come home very late last night?—No. It was just half past seven _________ I appeared before my parents.A. thatB. whenC. untilD. since8. How time files! It seems like years _________ I last saw you.A. whenB. thatC. sinceD. before9. It’s more than half a century _________ the People’s Republic of China was liberated.A. whenB. thatC. sinceD. after答案:1—5 CCADD 6—9 DBCCwhen〔引导时间状语从句〕具体地说,它有以下几种含义:1.表明一个动作发生的时候,另一个动作正在进行之中。
before 在英语中是一个比较常用的虚词,它既可作介词或副词用,也可作附属连词用。
在近几年的高测验题中通常出现考察其附属连词用法的标题。
下面就把before 作附属连词的用法归纳如下: 1. 表现“在……之前就……”。
比方:Mary had finished her homework before her mother returned.在她妈妈返来之前玛丽就已经完成了作业。
2. 表现“过了多久后才……;举动举行到什么程度才……”。
比方:The man almost knocked me down before he saw me.那个男子差点把我撞倒才望见我。
They walked about 30 miles to the west before they saw a village.他们西行了大略30 英里才望见一个墟落。
They worked day and night about three days before everything returned to normal.他们昼夜劳动了大略三天,一概才收复平常。
3. 表现“来不足;尚未……就……”。
比方:Before I could get in a word, he had measured me.我还没来得及插话,他就已经给我量好了尺寸。
He ran off before I could stop him.我还没来得及禁止他,他就已经跑了。
She left the company before I could have a word with her.我还没来得及和她打声招呼,她就已经脱离了。
4. 表现“刚……就……”。
比方:I had hardly sat down before the bell rang.我刚坐下铃就响了。
5. 表现“无声无息就……;还没弄清就……”。
比方:Time passed quickly and three months went by before Aqiao knew it.时间过得很快,无声无息阿巧已经度过了三个月。
一般现在时标志词:every day, evry Sunday, often, always, usually, sometimes , on Sundays, on weekdays等等。
一般过去时标志词:ago, yesterday, the day before yesterday, lastweek/year/night/month..., in 1989, just now, at the age of , one day, ago, long ago, once upon a time,(从前,很久以前)then(那时), on that day(在那天),一般将来时标志词:soon, tomorrow, the day after tomorrow(后天), this evening/afternoon/yearbefore long(不久以后), next year/month/week/summer, in the future, some day(将来的某一天) , in two weeks/days/years 现在进行时标志词:now. Look. Listen. these days , at that time. at that moment. this time , yesterday evening过去进行时标志词:at that time. at that moment. this time yesterday evening等;或者与when, while, as引导的过去时间状语连用。
现在完成时标志词:already(用于肯定句), yet(用于否定,疑问句), just, before, recently, still, lately, never, ever, never, twice, on several occasion, in the past few days/weeks/months/years, (up to)these few days/weeks/months/years, thismorning/week/month/year, just, up to present, so far,up to now, till now, since+时间过去完成时标志词:by, by the time (of), by the end of + 过去时间; when. before. after…….+过去时间; up till then (直到时); up until last night(直到昨晚)等; already, just, ever, yet 等。
before long与long before的区别
1.before long的意思是“不久,很快”。
(用于一般将来时或一般过去时)
①I'll be back before long. 不久我就回来。
(一般将来时)
②Before long he got married. 不久他就结婚了。
(一般过去时)
2.long before有两个用法:
(1)老早,早就(单独使用,表示比过去某时早得多的时间。
用于过去完成时)
①She had left long before. 她老早就离开了。
(过去完成时)
②That had happened long before. 那事老早就发生了。
(过去完成时)
【注】:
★long ago 表示“很久以前”,指的是从现在算起的很久以前,通常与一般过去时连用:
I met him long ago. 我很久以前就认识他了。
(一般过去时)
★not long ago 表示“不久前”,指的是从现在算起的不久前,与一般过去时连用:
Not long ago a rare new species of bird-like dinosaur was discovered in Chaoyang County, Liaoning Province.
不久前,在辽宁省的朝阳县新发现了一种罕见的、形状像鸟一样的恐龙。
(2)在……的很久以前,在还没有……的很久以前。
如:
①She had left long before his return [he returned]. (过去完成时)
在他回来的很久以前她就走了。
②He had worked in the factory long before he got married. (过去完成时)
在他还没有结婚的很久以前他就在这家工厂工作了。
【注】:此时的主句谓语通常用过去完成时,但有时也可用一般过去时(因为before 已体现了动作的先后关系)。
如:
This happened long before you were born. 这事在你还没出生以前很久就发生了。
3.区别以下句型:
(1)It is [was, will be] long before…“在……前需要很久”,“费时间……才……”。
①It was long before he came back. 过了好久他才回来。
②It was long before we knew what was wrong with our plan.
费了很长时间我们才知道计划错在哪里。
(2)It is / was not (won't be) long before… “不久就……”
①It won't be long before you get well.
你不久就会康复的。
(注意在before从句里用一般现在时代替将来时)
②It won't be long before we see each other.
不久我们又会见面的。
(注意在before从句里用一般现在时代替将来时)
练习:<答案:1. C 2. B 3. C 4. D>
1. They ______ on the earth tens of thousands of years ago, ______ humans came
into being and their future seemed secure at that time.
A. had lived; long before
B. had lived; long ago
C. lived; long before
D. lived; before long
2. ______he will return to his native land.
A. It is long before that
B. It is before long that
C. It won't be long before
D. It will be long before
3. ______he returns to his native land.
A. It is long before that
B. It is before long that
C. It won't be long before
D. It will be long before that
4. ______he returns to his native land.
A. It is long before that
B. It is before long that
C. It won't be long before that
D. It will be long before。