(完整版)before的用法归纳
- 格式:doc
- 大小:49.01 KB
- 文档页数:6
千里之行,始于足下。
Before用法小结Before是一个常用的介词和副词,有各种不同的用法。
以下是Before的用法小结:1. 作为介词:- 表示时间的挨次:在...之前- e.g. She arrived before me. (她比我先到达。
)- 引导时间状语从句:- e.g. Come home before it gets dark. (天黑前回家。
)- 引导地点状语从句:在...前面- e.g. There is a coffee shop just before the park. (公园前面有一家咖啡店。
)- 表示比较:在...之前(比较级)- e.g. He had never seen such a beautiful sunset before. (他从未见过这么美的日落。
)- 表示优先挨次:在...之前- e.g. Pay attention to safety before anything else. (首先要留意平安。
)2. 作为副词:- 表示时间的挨次:早先- e.g. I've known her since before. (我早就生疏她了。
)- 引导短语:在前面(通常与and等连用)- e.g. He spoke to me, Paul, and the others who were there before. (他先是和我说话,然后是保罗和其他在场的人。
)- 引导介词短语:第1页/共2页锲而不舍,金石可镂。
- e.g. It's better to be safe than sorry. (平安为上,不要等事情发生以后再懊悔。
)- 口语中用作插入语,表示让步:- e.g. I know it's a risk, but I want to try it before. (我知道这是有风险的,但是我还是想试一试。
)3. 短语和固定搭配:- before long: 不久后- e.g. He will be back before long. (不久后他会回来。
before的用法Before是一个常用的副词,意思是“在之前”,用来表示时间或时期,在句中常提到通常比提到的时间或时期早的时刻。
下面一起来看一下before的用法。
一、before的时间概念1. before表示的是“在……之前”。
例句:I have to leave before seven.我必须7点之前离开。
She needs to finish it before Monday.她必须在星期一之前完成它。
2. before也可以表示“以前”或“之前”。
例句:I have never been to Europe before.我以前从未去过欧洲。
He was famous before he started his business.他在开办自己的事业之前就已经很有名了。
3. before也可以表示“此前”,表示一个动作发生在另一个动作之前。
例句:She read the book before she watched the movie.她看过书之后再看电影。
He finished his homework before he went to bed.他先完成了作业,然后再睡觉。
4. before还可以表示“由于”、“因为”。
例句:I had to leave early before missing my train.我不得不提前离开,以免错过火车。
I had to hurry before it got dark.我必须在天黑以前赶紧动身。
二、before的句型1. before doing sth.意思是“在做某事之前”。
例句:He read the book before doing his homework.他先看书,然后再做作业。
We should make a plan before doing anything.我们在做任何事情之前都应该做一个计划。
2. before long意思是“不久以后”或“不远的将来”,用于某种变化将很快发生。
before作为介词的用法
"Before" 作为介词,有以下常见用法:
1. 表示时间上的“在……之前”:例如,“Before dinner”(晚餐前),“Before Christmas”(圣诞节前)。
2. 表示位置上的“在……前面”:例如,“Before the door”(在门前),“Before the bridge”(在桥前)。
3. 表示顺序上的“在……之前”:例如,“Before lunch, I usually have
a cup of coffee”(午餐前,我通常喝一杯咖啡)。
4. 表示关系上的“在……之前”:例如,“Before you can learn to drive, you need to pass the driving test”(在你学会开车之前,你需要通过驾驶考试)。
5. 表示比较上的“在……之前”:例如,“This building is before that one”(这座建筑在那座建筑之前)。
需要注意的是,“before” 作为介词时,后面通常接名词、代词或动名词。
例如,“Before dinner”(晚餐前)中的“dinner”是名词,“Before him”(在他面前)中的“him”是代词,“Before starting the car”(启动汽车前)中的“starting”是动名词。
before的用法before一词可以被使用在各种词性中,其用法多种多样,并且涵盖了众多的语言环境。
本文将对 before 作为副词、介词及连词的用法做一个综合性的说明。
一、Before 作为副词1、在英语中,before 作为副词,意思是“以前”、“早于”,用于指经历过的某一特定时间点或时刻之前,可以用在一般现在时或过去时句子中,如:(1)I had finished my work before he returned.(2)She will go to the party before the end of the week.2、也可以在否定修饰性的环境中出现,如:(3)I had not seen her before.(4)He hadn been here before.3、还可以用在定语从句中指示特定的时间,如:(5)I will never forget the day before yesterday.(6)The man before whom I bowed was my teacher.二、Before 作为介词1、在英语中,before 作为介词,意为“在...之前”,用于指示发生某种动作或感受的先前时间,或者指示某物之前让出某种空间,如:(7)He arrived a minute before the meeting ended.(8)We need to leave 15 minutes before the train arrives.2、也可用于比较,如:(9)He was taller than me before, but now I am taller than him.(10)The shape of the city has changed a lot before and after the earthquake.三、Before 作为连词1、在英语中,before 作为连词,意为“在...之前”、“要在...之前”,用在句子中表示一种先决条件,如:(11)You need to finish your homework before you go out to play.(12)We must leave before it gets dark.2、也可用于表达目的,如:(13)I worked hard before I could get the job.(14)She ate a lot before she felt full.本文从语法上介绍了 before三种用法,即副词、介词及连词的用法。
before,的用法Before,作为一个介词和副词,在句子中具有多种用法和含义。
它常用于表示时间、顺序、地点和条件等方面。
下面将详细介绍Before的不同用法及其相关例句。
一、表达时间顺序1. 在某个特定的时间之前,可以使用“before + 时间点/时间段/事件”来表示。
例如:- She arrived home before midnight.(她在午夜之前到家了。
)- I had finished my homework before dinner.(晚饭前我已完成了作业。
)2. 当两个动作或事件按照顺序发生时,可以使用“before + 动词的现在分词”来表示。
例如:- Brush your teeth before going to bed.(睡觉前刷牙。
)- He always takes a shower before going for a run.(他跑步前总是洗澡。
)3. Before也可以与过去完成时连用,表示“在过去某个时间之前已经发生的动作”。
例如:- They had already left before we arrived.(我们到达之前他们已经离开了。
)- She had finished her work before the deadline.(截止日期前她已经完成了工作。
)二、表达地点或位置1. 在某个位置之前,可以使用“before + 名词”来表示。
例如:- The library is just before the post office.(图书馆就在邮局前面。
)- The hotel is before the bridge.(酒店在桥前。
)2. Before也可以用于表示某个方向之前。
例如:- Turn left before the traffic light.(在红绿灯之前左转。
)- She saw him before he disappeared into the crowd.(他消失在人群中之前,她看到了他。
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的用法归纳总结“before”在英语中是一个常用的介词和连词,表示时间或顺序上的“在……之前”或“先于”。
以下是“before”的用法归纳总结:作为介词表示时间:用于表示某个事件或动作发生在另一个事件或动作之前。
复制代码She left the office before noon.(她中午之前离开了办公室。
)表示位置:用于表示某个物体或人位于另一个物体或人之前。
复制代码The car in front of me stopped suddenly.(我前面的车突然停了下来。
)与比较级连用:用于表示“在……之前”的比较关系。
复制代码She finished the race before anyone else.(她比其他任何人都先完成了比赛。
)作为连词引导时间状语从句:用于连接两个句子,表示一个事件在另一个事件之前发生。
复制代码We'll go for a walk before dinner.(我们将在晚饭前散步。
)引导条件状语从句:用于表示某个条件必须满足,之后才能发生另一个事件。
复制代码Before you leave, make sure all the lights are off.(你离开之前,确保所有的灯都关了。
)引导让步状语从句:用于表示尽管某个条件存在,但结果仍然如此。
复制代码Before I met her, I had never believed in love at first sight.(在我遇到她之前,我从不相信一见钟情。
)与其他词连用“before long”:表示不久之后,通常用于肯定句中。
复制代码Before long, she will be recovered from the illness.(不久之后,她就会从疾病中恢复过来。
)“ever before”:表示“以前从未”。
复制代码I have never seen such a beautiful sunset before.(我以前从未见过如此美丽的日落。
before的用法Before一个常用的副词,它可以放在句首,句中或句尾,作为一个修饰语表示先于,或先于某个动作发生,有时可以用来表示期待,但意思有时不明显。
Before句子中经常被误解,但它在英语中可以有很多用法,掌握它的使用也有助于英语的学习。
一、《before的基本用法》1)表示“在…之前”:Before示“在…之前”,常放在句首,构成前置结构,例如:Before I go, I want to say something.(我要离开之前,我想说一句话。
)Before you make a decision,we should think it over.(在你做出决定之前,我们应该仔细考虑一下。
)2)表示期待:Before可以表示期待,但意思有时不明显,例如:I wrote a letter before you.(我在你以前就写了一封信。
)这句话引导对方期待读到一封信,故意暗示自己写了一封信,但没有明确的提及。
3)表示因果关系:Before 也可以表示因果关系,因此可以用在完成时态句中,例如:He passed the exam before he studied hard.(他在努力学习之前,就通过了考试。
)二、《before的特殊用法》1)用于疑问句:在疑问句中,before常用于请求对方断定要某件事发生在另一件事发生之前,例如:Did you go out before it started raining?(你在下雨之前出去了吗?)2)用在否定句中:before否定句中,表示要求迅速采取行动,例如:Don do it before I come.(在我来之前不要做。
)三、《before的用法练习》1)翻译句子:I want to talk to you before I go.我要离开之前想和你说话。
before的句型结构
"before"这个词的句型结构可以有多种,以下列举几个例子:
1. Before + 主语(句子):表示某个事件或行动在另一个事件或行
动之前发生,例如:Before I go to bed, I always brush my teeth.(我睡觉之前总是刷牙。
)
2. Before + 名词 / 代词:表示在某个时间点之前发生的事情,例如:Before the concert starts, we have time to grab a coffee.(音
乐会开始之前,我们有时间去买杯咖啡。
)
3. Before + 现在分词 / 过去分词:表示在某个事件或行动之前正在
或已经发生的事情,例如:Before boarding the plane, we need to go through security.(登机之前,我们需要通过安检。
)
4. Before + 不定式:表示某个行动或事件在另一个行动或事件之前
完成,例如:Before starting a new project, I like to
brainstorm ideas.(开始一项新项目之前,我喜欢先集思广益一些想法。
)。
before的用法总结before的用法总结以下是小编为大家总结的before的用法,希望能帮助大家更好地掌握before的用法,提高英语水平。
before的用法总结1 作介词A.指时间.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. 指顺序或排列在前面. e.g. You name comes before mine on the list .2 作连词A.在……之前. e.g. Did she leave a message before she went ?B.用于It + be +时间段 + before :在……之后才…… e.g. It willl be five years before I come back .3 常于情态动词 can / could 连用:还没来得及……就……e.g. Before I could say a word , she had rushed out of the room掌握before热点用法1. prep. 在......以前,强调时间He came to see me the day before yesterday. 他前天来看我了。
2. prep. 在......前面,当着......的面,向......,强调地点She has to appear before the court. 她必须出庭受审。
3. prep. 在......之前,先于,强调次序Those with babies can get on the bus before others. 带小孩的人可以先上汽车。
4. prep. 与其......(宁愿)I'd shoot myself before I apologized to him! 我宁死也不向他道歉!5. adv. 以前,强调时间We've seen that film before. 我们以前看过那场电影。
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。
2. 用于It + be + 时间段+ before...句型中,意思是“在……之后才……”。
例如:It will be five years before I come back.我五年后才能回来。
It was not long before the enemy was driven out of their country. 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”。
It won’t be long before they understand each other. 他们不久就会互相了解的。
3. 还有“趁……(还没有)”之意。
例如:They are thinking of buying the house before the prices go up. 他们正在考虑趁房价未涨时把房子买下来。
Do it before you forget it. 趁早动手,以免忘了。
二、before用作介词before用作介词时, 可以指时间“earlier than在……之前”,也可以指位置“in front of在……之前”。
例如:(1)表示时间,与after相对。
如:August comes before September. 8月份在9月份之前。
There is nothing that has not been bitter before being ripe. 凡事在成熟前,都是有苦味的。
(2)表示顺序,与after 相对。
如:Ladies before gentlemen.女士优先。
(3)表示位置,与behind相对(相当于in front of)。
如:Before Lucy is Lily. 莉莉在露茜的前面。
Don’t put the cart before the horse. 不要本末倒置。
(4)表示“在……面前;与……面对面”。
如:The poor little boy was brought before the headmaster. 那个可怜的小男孩被带到校长面前。
He was brought before the judge. 他被带到法官面前。
(5)表示“宁可……而不愿……”。
如:Death before dishonour. 宁死不辱。
三、before用作副词(1)before用作副词时,意思是“at an earlier time / in the past以前”。
表示“以前;已经”,单独在句中作状语,句子常用完成时态。
如:I have seen that film before.我以前看过那部电影。
I’ve seen the film Titanic before. 我以前看过《泰坦尼克》这部电影。
I have never seen such beautiful flowers before. 我以前从未见过如此美丽的鲜花。
注意:①区别于ago: ago用在时间段之后,表示某个时间点,句子用一般过去时。
如:I saw that film three years ago.我三年前看了那部电影。
②含有ago 时间状语的直接引语变间接引语时,ago 应变为before。
如:He said to me, “I saw that film three years ago.”→He told me that he had seen that film three years before.(2)指空间或位置,表示“在前面”。
如:Look at the page before.看前面一页。
四、4. 几个需要注意的地方(1)ever before,单独用作状语,表示“以前”;ever since, 单独用作状语,表示“自从那时以来”;ever after, 单独用作状语,表示“以后;后来”。
(2)before long,单独用作状语,表示“不久以后”,其中long 为名词,后面不接任何成分;可以用于各种时态。
例如:Before long, he went to America. 不久,他就去了美国。
I hope to see you before long. 我希望不久后再见到你。
long before:①单独用作状语,表示“很久以前”,其中before为副词,其后不接任何成分;一般用在过去时或过去完成时的句子里。
②表示“在……之前很久”,其中before用作介词或连词,后可接名词、动名词、代词或从句。
She said she had read the novel long before. 她说她很久以前就读过这部小说。
That happened long before. 那件事发生在很久以前。
(3)when/ while/ if/ unless/ once/ even though 等引导从句时,如果从句主语和主句的主语相同或为it,并且从句谓语含有be动词,则可以省略从句的主语和be动词部分,形成“when / while / if / unless /once /even though +V-ing或V-ed分词”结构;但是before和after 则不用这一句式,二者后只接动名词或者完整的从句。
如:①When (it is ) translated into English, the word means “newspaper”.其中it is可省略②Before being operated on, he took some special medicine.其中being operated on 为动名词的被动式,being 不可省略。
before可以用作连词,引导时间状语从句。它用法灵活、译法多变,是高考的一个重要考点。现对其用作连词时的用法加以总结,希望对同学们有所帮助。1.【高考题例】 (加下划线的选项为正确答案)① (2006四川) —Why didn’t you tell him about the meeting?—He rushed out of the room______I could say a word.A. beforeB. untilC. whenD. after② (2003北京) He made a mistake, but then he corrected the situation______it got worse.A. untilB. whenC. beforeD. as2. before作“……才……”解时,强调从句谓语动词表示的动作发生得太慢或太晚。例如:The bus driver almost knocked me down before he saw me. 那位公交车司机差一点把我撞倒,他才看到了我。The fire lasted about four hours before the firefighters were able to control it. 大火持续了大约四个小时,消防队员才把火控制住。【高考题例】 (加下划线的选项为正确答案)③ (NMET 2004, Ⅳ) Several weeks had gone by______I realized the painting was missing.A. asB. beforeC. sinceD. when④ (2005广东) The American Civil War lasted four years______the North won in the end.A. afterB. whenC. beforeD. then3. before可译为“趁……”、“以免”、“以防”等。例如:I’ll do it now before I forget it.趁还没有忘,我现在就把这事做了。We’d better finish the work in time before the boss scolds us.我们最好按时完成这项工作,免得挨老板的骂。4. before可译为“(宁可……而)不愿”。例如:He’d die before he apologizes to them.他宁死也不向他们道歉。I’d give up the plan before I turn to him for help.我宁可放弃计划也不会向他求助。5. 注意“It + be +一段时间 + before从句”中主句和从句的时态。该句式中,主句和从句的时态有两种情况:如果主句用一般将来时,则从句用一般现在时,意为“多长时间以后某事即将发生”;如果主句用过去时,从句也用过去时,意为“多长时间后某事才发生”。【高考题例】 (加下划线的选项为正确答案)⑤ (2006福建) —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. before⑥ (2005山东) It was some time______we realized the truth.A. whenB. untilC. sinceD. before练一练:1. (2002上海春) It______long before we______the result of the experiment.A. will not be; will knowB. is; will knowC. will not be; knowD. is; know2. (2004福建) Scientists say it may be five or six years ______it is possible to test this medicine on human patients.A. sinceB. afterC. beforeD. when3. (2004天津) It was evening ______we reached the little town of Winchester.A. thatB. untilC. sinceD. before4. —Why didn’t you help the little boy?—Oh, sorry. He had struggled to his feet ______I ran over.A. beforeB. afterC. untilD. since5. Time passed quickly and three weeks went by ______we knew it.A. beforeB. afterC. whenD. till6. She was such a proud person that she would die ______she would admit she was wrong.A. rather thanB. untilC. afterD. before7. We had to sell the vegetables at a low price ______they rotted away.A. afterB. beforeC. whenD. until8. A dozen ideas were considered ______the chief architect decided on the design of the building.A. becauseB. beforeC. whetherD. unlessKey: 1. C2. C3. D4. A5. A6. D7. B8. B。