| 释义 |
be·fore 英bɪˈfɔː, -ˈfəʊr美bɪˈfɔr, -ˈforAHDbĭ-fôrʹ, -fōrʹ ★★★★★常初中高研牛４COCA²³⁰BNC²²²iWeb²⁰⁴Economist¹²⁸
基本双解英英易错辨析词源搭配短语记法近义反义句型派生词用法例句Thesaurus
conj.在…以前²pref.在…以前²⁴;在…前面¹adv.以前;以往³;之前⁷⁰
prep.介词
表示位置在…前面in front of 表示时间先于,在…以前earlier than; preceding in time 表示顺序在…之前at an earlier point in an order than; ahead of 表示比较优于,先于occupying a superior place in order of precedence or importance 表示选择与其…宁可in preference to, rather than
conj.连词
在…之前earlier than the time
adv.副词
先前; 从前; 以前at an earlier time; already; formerly 在前，在前面in the front 到前面forward
Adverb:
earlier in time; previously;I had known her before as I said before he called me the day before but your call had come even earlier her parents had died four years earlier I mentioned that problem earlier at or in the front;I see the lights of a town ahead the road ahead is foggy staring straight ahead we couldn't see over the heads of the people in front with the cross of Jesus marching on before
conj.连词
铃还没响，同学们就走出去了。❌ The students went out before the bell didn't ring. ✔️ The students went out before the bell rang. before引导的时间状语从句不能用于否定句。
prep.介词
before, by这两个词都可表示“在…之前”。before所表示的时间不包括其宾语所指时间在内,与之连用的动词可以是延续性动词,也可以是瞬间动词; by所表示的时间包括宾语所指的时间在内,因而常译成“不迟于…”。 before, for这两个词都可表示时间，但before可用于肯定句和否定句，表示将来的一个时间点；而for只用于否定句，表示将来的一个时间段。例如： The sun will not rise before six o'clock.太阳在六点钟前不会升起。
The sun will not rise for an hour.太阳在一个小时之内不会升起。before, in front of这两个词组都可表示“在…前面”，在表示位置或“当…的面”时两者常可替换。其区别是： 1.表示具体事物如建筑物之前时用before较正式，而用in front of更普通。 2.在表示人的名词前和较抽象化或比喻用法时通常用before。 3.before还有引申义，例如： A tree stands in front of the home.房子前面有棵树。
A tree stands before the door of the house.房子前面有棵树。第二个句子使用before暗示这棵树可“给房子遮阴”或“给人出行造成困难”等意。 before, till, until这三个词均可表示“在…之前”“直到”。 1.在否定句中, before和till或until可以互换,但前者强调句中动作在其宾语所指时间之前的进展情况,而后者则强调句中动作在其宾语所指时间之后的转变情况。 2.在肯定句中, before强调句中动作在其宾语所指时间之前已经完成或强调句中状态在其宾语所指时间之前持续的情况,因而句中可以用持续性动词或瞬间动词; till和until则强调句中动词所表示状态在其宾语所指时间之后的结束或转变情况。
conj.连词
下面两个句子的意思相同:I left before he came. I left before he had come.他还没来我就走了。
adv.副词
before long, long beforebefore long的意思是“不久之后”,相当于soon,其中before是介词, long是名词; long before的意思是“很久以前”,相当于a long time earlier,long与before都是副词, long说明before的程度。试比较: It happened before long.不久就发生了。
It happened long before.很久以前就已发生了。before, ago这两个词都可表示“从前”。其区别是： 1.ago一般只作副词; 而before除作副词外,还可用作连词、介词。 2.ago总是与表示时间的名词或形容词连用,不单独使用; 而before可以单独使用。 3.ago用于从现在算起的某段时间从前,和一般过去时连用,不用现在完成时。而before用于从过去某时起若干时间以前的场合,动词需用过去完成时。例如： I left school three years ago.我三年前离开了学校。
He said he had finished the job three daysbefore.他说他在三天前就完成了这项工作。
I told you before.我以前告诉过你。以前我从来未见过那本书。 【误】 I never saw that book ago. 【正】 I never saw that book before. before, ahead, forward这组词的共同含义是指“在某时间或地点以前”，其区别是： 1.before主要用于时间而少用于地点；而ahead和forward则主要用于地点而少用于时间。 2.用于地点时，ahead指自身以外的前方，而forward则指自身的前部。试比较： The commander sent a group of scouts ahead.指挥员派一支侦察队到前面去。
The commander sent a company forward.指挥员调一连人到前面来。前句表示小分队离开大部到前面去, 后句则表示把一人调至队首或较前面的位置。 在航海上, ahead指方向或位置在船外或船的前部; 而forward则指中部靠前的位置。 用于引申意, 也有同样的区别, 如look ahead可指预见长远后果而不计较当前得失, 而look forward则指预料到某事可能或一定能发生。 3.用于指可顺、逆变化的机械运动时，ahead和forward则无明显差别，例如按顺时针拨动表针，可说set the clock forward，也可说set the clock ahead。 ago，before这两个副词均含“……以前”之意。 ago指从现在起往前推算一段时间，始终置于所修饰的词之后，与一般过去时连用。 before或指从过去某一时间起向前推算的若干时间的以前，通常与过去完成时连用；或泛指以前，并不具体指若干时间以前，可使用现在完成的或过去时；还可指从将来某一时间起的若干时间以前。 before，in front of，in the front of这些前置词短语均含有“在……前”之意。 before指空间位置或时间的“在……前”。表时间时，反义词为after；指空间位置时，其反义词是behind。 in front of指在某地方之外的前面，即不在其中，多与静态动词连用，通常可与before通用。 in the front of指在某地方之内的前面，即在其中的前部分。 来源于日耳曼语,在古英语中是beforan,由前缀be-经由和后半部foran前面组成;后半部foran同时是现代英语中for的词源,最初的意义是“先前”,逐步发展为现代的意义。
同源词：-prim-, proto-, first, for, fore, former, foremost, forth, fro, from
用作介词 prep.
动词+～appear before在某时之前出现;出庭carry before迅速获胜,势如破竹come before在…之上,比…重要;被交由…处理；被提交…考虑complain before控诉go before出现在某人面前；送于…讨论；先于；早于lay before提出set before把…放在…前面；认为…比…更重要；把…提交…考虑stand before站立在…前面，来到…面前，面对，面临，抵御，抵挡carry the world before one一举大获成功cast pearls before swine对牛弹琴,明珠暗投put the cart before the horse本末倒置,倒行逆施sweep all before one获得彻底的胜利，所向无敌be brought before the bench被带到法庭受审take sb before court将…送上法庭～+名词before day破晓前before long不久,很快;在短时间内before one's eyes当着某人的面before one's time在时代前面;思想过于先进before the mast充当水手before time提前before the wind顺风before the world在众人面前，公然the day before yesterday前天the week before last上上星期～+副词before now从前,以前
用作介词prep.before long时间不久之后,在短时间内 in a short time 用作副词adv.long before很久以前 very long ago 钱博士be=by，挨着+for前面+e⇒在…之前
词根for-向前，在前来自原始日耳曼语。它和常见前缀pro-在前，向前、pre-在前，向前最终都源自原始印欧语词根*per-1前，辅音字母f-p相通。非常记忆be是〖熟词〗+for为了〖熟词〗+e鹅〖编码〗⇒以前癞蛤蟆内讧是为了天鹅肉be=by，挨着+for前面+e⇒在…之前。词根记忆be+fore前面近义词 aheadadv. ago反义词prep. afterbehindadv. after
用作介词prep.The man standing before the blackboard is our English teacher.站在黑板前面的那个人是我们的英语老师。
We got up before sunrise.我们在太阳升起之前起床。
Before crossing the road, you should have a look at both ways.过马路之前,你应该看看路的两边。
Quality comes before quantity.品质优于数量。
We must stop and rest before going any farther.我们必须停下来休息一下再向前去。
You must pay attention to this problem before every thing.你应该首先注意这个问题。
The criminal case comes before the court.那桩刑事案件已送法院审理。
Great sums of money were placed before the scientists by the government.政府为科学家们提供了大笔的经费。
What do you earn before tax?在未缴税前你的收入是多少?
He would die before betraying his country.他宁愿一死,也不肯叛国。用作连词conj.Be a pupil before you become a teacher.先做学生,再做老师。
He will come to see you before he leaves Beijing.他离开北京之前会来看你的。
It will be some time before we know the full results.还要过一些时间我们才能知道全部结果。
It will be eight years before we meet.八年以后我们才能相见。
His father died before he was born.他父亲在他出世以前就去世了。
He had left for the United States just before the letter arrived.他恰好在信到之前去美国了。
She died before she reached the hospital.她还没有到医院就死了。
I had barely come in before the telephone rang.我刚进来,电话就响了。
Barely had she sat down before the play began.她刚坐下,戏就开始了。
We had scarcely left the house,before it began to rain.我们刚刚离家，天就下起雨来。
I will die before I'd surrender.我宁愿死也不投降。
He'd sit alone in the dark before he'd watch TV.他宁愿一个人在黑暗里坐着也不看电视。
We must stop and rest before going any farther.我们必须停下来休息一下再向前走。用作副词adv.We saw that filmbefore.那部电影我们以前看过。
I have read the bookbefore.我以前读过这本书。
It came across my mind that I had met him somewherebefore.我突然意识到我曾在什么地方见过他。Pbeforehandad.预先Pbeforetimead.以前从前Pbefore-mentioneda.上述的Pthereinbeforead.在上文前头Phereinbeforead.以上在上文中
prep.介词
before可用于表示时间。首先，可以表示“先于，在…以前”，其后可以跟表示具体日期、时间等的名词或数词，也可以跟表示时间或动作的名词。其次，可以表示“在做…之前”，后接 v -ing。再次，可以表示“紧接在…之前”。before用于否定句还可表示“直到…为止”。注意before之后只能接表示时间点的名词，而不能接表示时间段的名词。 before可用于表示动态或静态的位置，意思是“在…之前”，与behind相对。 before可用于表示顺序或排列上的“在…之前”或“居于…之前”，与after相对。引申可用于表示比较，即在等级、价值、重要性、能力等方面的“在先”“优于”“重于”。再引申则可用于表示对某事物的优先选择，即“宁可”或“与其…宁可”。 before还可表示“面对，在…眼前，在…面前”“有待于去完成”“在审理中，由…考虑”“在…压力下”等。
conj.连词
before主要引导时间状语从句，意为“先于”“…之后才”“不多久就…”。当主句是将来时时，从句谓语动词须用现在时；当主句是一般过去时或过去完成时时，从句常用过去时。before引导的时间状语从句不能用于否定式。 before还可用于barely〔scarcely〕…before结构，意为“刚…就…”。 before还可引导让步状语从句，意思是“宁愿…也不…”。 before引导的从句常用省略句型。
adv.副词
before用作副词时,意思是“以前,在前面”,表示从较近的过去至较远的过去。用作时间状语泛指以前、不与具体时间连用时，谓语动词可以用一般过去时,也可用现在完成时,前者只表示“过去发生过”,后者则强调“对现在有影响”。 before与具体时间连用时,一般置于其后，谓语动词通常用过去完成时。 before也可表示空间或位置的“在前，在前面”，还可表示运动“到前面”。 Before同ago的比较：表示“早于现在多少时间前”，用ago。表示“早于过去某时多少时间前”，通常用before 。表示“早于将来某时多少时间前”，也用before。表示“早于任何某时不是现在、过去或将来的某时多少时间前”，仍用before。表示“从现在说到以前，不特指若干时间”时，用before。在倒数回以前，表示“一些事情已发生了多久”时，可用before。He started five minutes ago.He told me he had seen her a few minutes before.英美人也有用ago，觉得语气比较生动。When you call at the shop again this afternoon, you may be told that the book has been sold only a few minutes before.He often forgets what he has heard only a few minutes before.We have met them many times before.When I went back to the town that I had left eight years before, everything was different. before与不同介词搭配时，句子意思有差异。All day, as three days before, we planted trees.同三天前一样，我们一整天都在种树。 All day, as for three days before, we planted trees.同以前的三天一样，我们一整天都在种树。before既可作副词，也可作介词，如在three hours before中为副词。在before three o'clock中为介词，但要注意before不能在表示“一段时间”的词前作介词，不能说before a month，可说a month ago； before long，属于习语，表示“不久以后”，同before a long time has passed意思一样。before very long也指“不久以后”，但比before long时间短； 要注意before的表达方式，不能说before five minutes of the accident，而是five minutes before the accident。其他表达方式如下：A few minutes before the accident she called on me.不含the/forDuring the few minutes before the accident she had a chat with me.含the For a few minutes before the accident she had a chat with me.含forbefore作连接词，指“……以前”时，后接到从句中的动词一般不能用将来时。如不可以说He will arrive before she will start，可以说He will arrive before she starts。若是表示“长久以后才会发生的事”时，可用将来时。 It will not be long before they come back.他们很快就回来了。
介词95%,副词4%,名词1%
用作前缀B comesbeforeC in the alphabet.B在字母表里排在C之前。
He made a statementbeforethe House of Commons.他在下议院当众发表了一个声明。
He always put the interests of othersbeforehis own.他总把他人的利益放在第一位。用作副词I'd met him oncebefore.我曾经见过他。
I have seen that filmbefore.那部电影我以前看过。
I was inspired to work harder than everbefore.我受激励比以往任何时候都更加努力地工作。
He used to get some shut-eyebeforethe game.他以往常常在比赛前睡一会儿。
He overlooked the contractbeforehe signed it.他在签字之前仔细阅读了合同。
I'll try to rush the book throughbeforeSaturday.我会设法在星期六之前把这本书赶紧看完。adv.earlier
同义词 ahead,back,previously,since,soonerafore,aforetime,ante,antecedently,anteriorly,before present,ere,fore,former,formerly,forward,heretofore,in advance,in days of yore,in front,in the old days,in the past,past,precendently,previous,up to now
反义词 after,afterward,behind,laterprep.earlier than
同义词 sinceahead of,ante,antecedent to,anterior to,ere,in advance of,in front of,preceding,previous to,prior to
反义词 after,afterward,behind,later
abovepreposition superior to
beyond,exceeding,prior to,superior to,surpassing
agoadverb in the past
ages ago,back,back when,before,from way back,from year one,gone,since,since God knows when,time was
aheadadverb in front or advance of
advanced,advancing,along,ante,antecedently,at an advantage,at the head,before,beforehand,earlier,first,fore,foremost,forward,forwards,in the foreground,in the lead,leading,on,onward,onwards,precedent,precedently,preceding,previous,progressing,to the fore
ahead ofadjective in front of
before,in advance of
ahead of timeadverb before an event
before,before the appointed time,beforehand,early,too soon,with time to spare
alreadyadverb before expected time
as of now,at present,before,before now,but now,by now,by that time,by the time mentioned,by then,by this time,earlier,even now,formerly,heretofore,in the past,just now,now,once,previously,then,up to now |