2022年before的用法归纳.docx

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1、名师归纳总结 精品学习资料 - - - - - - - - - - - - - - -before 的用法是许多的人都比较想要明白的,在众人的心中 before 的用法 是比较难的,我们都特别想要去明白before 的用法,但是又谈何简单呢.为了让大家更加快速的明白 望对大家有所帮忙；before 的用法,下面我们就和老师一起去看看吧,希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.从前,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；为了帮忙大家把握,现就对 一、

2、before 用作连词before 的用法归纳如下：1. before 用作连词时,意思是 “在 之前;仍没来得及 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. 她仍没来得及动弹, 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；Dont count your c

3、hickens before they are hatched. 不要兴奋得过早；I must finish my homework before I watch TV.我必需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 wo

4、rd. 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 ,但我仍将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觉他们的看法很不一样 . 留意： before 从句如是一个将来的动作,就用一般现在时代替一

5、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 ”；例细心整理归纳 精选学习资料 - - - - - - - - - - - - - - - 第 1 页,共 6 页 - - - - - - - - - 名师归纳总结 精品学习资料 - - - - - - - - - - - - - - -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.

6、不久之后,敌人就被赶走了；假如主句中用否定式,就表示“不多久 就”；It won t be long before they understand each other. 他们不久就会相互了 解的；3. 仍有 “趁 仍没有 ”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

7、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）表示次序,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；Dont put the car

8、t 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“以细心整理归纳 精选学习资料 -

9、 - - - - - - - - - - - - - - 第 2 页,共 6 页 - - - - - - - - - 名师归纳总结 精品学习资料 - - - - - - - - - - - - - - -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漂亮的鲜 花；留意：区分于 ago: ago 用在

10、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；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. 几个需要留意的地方（1）ever before,单独用作

11、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. 我期望不久后再见到你；long before：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；表

12、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, 假如从句主语细心整理归纳 精选学习资料 - - - - - - - - - - - - - - - 第 3 页,共 6 页 - - - - - - - - - 名师归纳总结 精品学习资料 - - - -

13、- - - - - - - - - - -和主句的主语相同或为it,并且从句谓语含有be 动词,就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 就不用这一句式,二者后只接动名词或 者完整的从句； 如：When it is translated into English, the word means “ newspaper” .其中 it is 可省略 Before being operated on, he took some

14、 special medicine. 其中 being operated on 为动名词的被动式, being 不行省略；before 可以用作连词 ,引导时间状语从句 .它用法敏捷 .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,期望对同学们有所帮忙 .1.【高考题例】 加下划线的选项为正确答案 2006 四川 Why didnt you tell him about the meeting.He rushed out of the room_I could say a word. A. before B. until C. when D. after 2003 北 京

15、 He made a mistake, but then he corrected the situation_it got worse. A. until B. when C. before D. as 2. 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 t

16、o control it. 大火连续了大约四个小时 ,消防队员才把火掌握住 .【高考题例】 加下划线的选项为正确答案 NMET 2004, Several weeks had gone by_I realized the painting was missing. A. as B. before C. since D. when 2005 广东 The American Civil War lasted four years_the North won in the end. A. after B. when C. before D. then 细心整理归纳 精选学习资料 - - - - -

17、- - - - - - - - - - 第 4 页,共 6 页 - - - - - - - - - 名师归纳总结 精品学习资料 - - - - - - - - - - - - - - -3. before 可译为 “趁 ”.“以免”.“以防”等.例如: I ll do it now before I forget it.趁仍没有忘 ,我现在就把这事做了 .Wed 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: Hed die b

18、efore he apologizes to them.他宁死也不向他们赔礼 .I d give up the plan before I turn to him for help.我宁可舍弃方案也不会向他求助 .5. 留意“ 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形:假如主句用一般将来时,就从句用一般现在时 ,意为 “多长时间以后某事即将发生 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 ” ;假如主句用过去时 ,从句也 2006 福建 How long do you think i

19、t will be_China sends a manned spaceship to the moon. Perhaps two or three years. A. when B. until C. that D. before 2005 山东 It was some time_we realized the truth. A. when B. until C. since D. before 练一练 : 1. 2002 上 海 春 It_long before we_the result of the experiment. A. will not be; will know B. is

20、; will know C. will not be; know D. is; know 2. 2004福建 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 3. 2004 天津 It was evening _we reached the little town of Winchester. A. that B. until C. since D. before 4. W

21、hy didnt you help the little boy.Oh, sorry. He had struggled to his feet _I ran over. A. before B. after C. until D. since 细心整理归纳 精选学习资料 - - - - - - - - - - - - - - - 第 5 页,共 6 页 - - - - - - - - - 名师归纳总结 精品学习资料 - - - - - - - - - - - - - - -5. Time passed quickly and three weeks went by _we knew it.

22、A. before B. after C. when D. till 6. She was such a proud person that she would die _she would admit she was wrong. A. rather than B. until C. after D. before 7. We had to sell the vegetables at a low price _they rotted away. A. after B. before C. when D. until 8. A dozen ideas were considered _the chief architect decided on the design of the building. A. because B. before C. whether D. unless Key: 1. C2. C3. D4. A5. A6. D7. B8. B细心整理归纳 精选学习资料 - - - - - - - - - - - - - - - 第 6 页,共 6 页 - - - - - - - - -