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before用法归纳

before用法归纳
before用法归纳

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. before

B. if

C. while

D. 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. after

B. before

C. when

D. 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. as

B. before

C. since

D. 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…。

—Why didn’t you tell him about the meeting ( 2006四川,35)

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

A. before

B. until

C. when

D. after

【解析】选A。本题考查连词before表示“还没来得及……就……”的用法。句意为:我还没来得及说一句话,他就冲出了房间。

4. 表示“以免,以防,趁……还没有……”,强调动作的必要性,以避免或防止从句动作的发生。

He made a mistake, but then he corrected the situation _____ it got worse.(2003北京)

A. until

B. when

C. before

D. as

【解析】选C。由made a mistake和转折词but可知本题句意是“他犯了一个错误,但在事情进一步恶化之前他改变了形势。”故答案正确答案为C项。

5. 用于“It will be/would be+一段时间+before…”句型中,表示“还要过多长时间才……”;用于“It was+一段时间+before…”句型中,表示“过了多长时间才……”,强调时间的“长”。

(1) I’m sorry you’ve been waiting so long, but it’ll still be some time ____ Brian get back. (2008北京,34)

A. before

B. since

C. till

D. after

【解析】选A。句意:很抱歉你一直在这儿等了很久了,但是还得过一段时间Brian才能回来。It will be +一段时间+before从句表示“还要过多久才……”,符合句意。

(2)The field research will take Joan and Paul about five months; it will be a long time _____ we meet them again. (2007安徽,21)

A. after

B. before

C. since

D. when 【解析】选B。句意:这个项目的研究要花掉Joan和Paul大约五个月的时间;我们要过很长时间才能再见面。before与一段时间连用且用于肯定句中表示“要过多长时间才……”,故选B。

(3) He was told that it would be at least three more months ______he could recover and return to work. (2007江西,29)

A .when B. before C. since D. that 【解析】选B。句意:他被告知他至少还需要三个多月才能康复上班。before用于“It would be+一段时间+before…”句型中表示“要多多长时间才……”。

(4) It was some time ___________we realized the truth. (2005山东)

A. when

B. until

C. since

D. before

【解析】选D。before用于句型“it was +时间段+ before …”中表示“过了多长时间才……”。题意为:过了一段时间我们才意识到事情的真相。故正确答案为C项。

6. 用于句型“It won’t be/was not+一段时间+before…”中,意为“不久就……”,“没过多长时间就……”,强调时间的“短”。

John thinks it won’t be long he is ready for his new job. (2010陕西,

20)

A. when

B. after

C. before

D. since

【解析】选C。句意为:约翰认为,用不了多久他就会为他的新工作做好准备。It won’t be long before...意思是“用不了多久就会……”,符合句意,因此C为正确答案。when引导时间状语从句时意为“当……的时候”或“这时”;after表示“……以后”;since表示“自从……”,后接一个过去的时间或过去的某件事,均不符合题意。

7. when和hardly连用,表示“刚一……就……”。该结构主句常用过去完成时,当hardly 位于句首时,要用倒装语序。

The girl had hardly rung the bell ______ the door was opened suddenly, and her friend rushed out to greet her. (2010福建,26)

A. before

B. until

C. as

D. since

【解析】选A。句意:那个女孩刚一按门铃,门就开了,她的朋友冲出来迎接她。before 和hardly连用,表示“刚一……就……”,与语境相符。until“直到”;as“当……的时候”;since“自从……以来”,均与语境不符。

8. before句型和其它相似句型的区别

有时候before引导的时间状语从句与since,when引导的时间状语从句在下列结构中较相似,容易混淆。

(1) “It be +时间段 + since引导的时间状语从句”表示“自从……已经有多长时间了”。主句用一般现在时或现在完成时。

It is almost five years we saw each other last time. (2005北京,春招)

A. before

B. since

C. after

D. when 【解析】选B。考查since的用法。句意为:自从我们最后一次见面已经几乎五年了。It is/ has been +一段时间+since从句意为“自从……已经(多久)了”,since从句中谓语动词用过去时态。

(2) “It be +时间点 +when引导的时间状语从句”表示“某个动作发生时是某个时间”。

主句谓语动词可以是一般过去时,也可以是一般将来时。

Because of the heavy traffic, it was already time for lunch break she got to her office. (2010四川,20)

A. since

B. that

C. when

D. until

【解析】选C。句意:因为交通阻塞,当她到达办公室时已经是午休的时间了。when引导时间状语从句,意为“当……的时候”,符合句意,为正确答案。

9. before long和long before的区别

(1) before long意为“不久,很快”(其中before是介词,long是名词),常在句中作状语,多与动词的过去时或将来时连用。例如:

·Before long, the news sped to every part of the world.

不久以后,这个消息遍布到了世界上的每一个地方。

·I am so excited that I will enter a new school before long.

不久我就要进入一所新的学校学习,我感到非常兴奋。

(2)long before有两个用法:一为“老早,早就(单独使用,表示比过去某时早得多的时间)”。二表示“在……的很久以前,在还没有……的很久以前”。如:

·She had left long before his return/he returned 在他回来的很久以前她就走了。·He had worked in the factory long before he got married. 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。

趁热打铁:

1. ——Tommy, your mum has been out without glasses !

——Well, take it easy. she comes back home for them.

A. It is long before that

B. It won’t be long s ince

C. It won’t be long before

D. It will be long before

【解析】选C。考查固定句型。It won’t be +时间段+before表示“过不了多久就会……”;It will be +时间段+before表示“要过多久才……”;由take it easy可知后句意为“过不了多久她就会回来”,故选C。

2. How long do you think the computer company brings out a new product

A. it will be before

B. will it be until

C. will it be when

D. it will be that

【解析】选A。复合疑问句中的do you think后的句子为陈述语序,排除B、C。It will be…before…表示“要过多久才……”。句意为:你认为这家电脑公司要过多久才能出新产品

3. ——Have you any information about Julia ——Pity! It’s a long time I met her last.

A. before

B. since

C. until

D. when

【解析】选B。自从我最后一次见她到现在已很久了。由句意以及主从句时态关系可知用since。

4. It' s quite a time _____ Yao Ming got injured, but it won' t be long he returns to the court.

A. since;before

B. after; when

C. before;since

D. that; when

【解析】选A。考查since和before的用法。句意为:自从姚明受伤已经有相当一段时间了,但是要不了多久他就会回归球场的。It is +一段时间+since从句意为“……已经(多久)了”;It won’t be long befor e +从句意为“过不了(多久)就将……”。

5. It may take a while _____ you find a hobby that truly interests yourself, so don’t give up.

A. that

B. before

C. unless

D. since

【解析】选B。句意:要经过一段时间,你才能找到使你感兴趣的爱好。It be +段时间+before 意为“要过多久才……”。

6. How long do you suppose it is ______he arrived there

A. when

B. before

C. after

D. since.

【解析】选D. 你认为他到这有多久了since “自从”,由它引导的状语从句,主句为一般现在时态时,从句用一般过去时态。

keep 的用法

Keep的用法: keep vt., vi. kept, keeping 保留;保守 I keep old letters.我保存旧信。 I'll keep the original copy of your report on file. 我会把你报告的原件归档的。 It's an interesting suggestion and we'll keep it on ice." 这是一项有趣的建议,我们将留待以后考虑采用。" 保持;继续 We will keep on trying and, if we get anything done, will notify you. 我们将继续努力,有结果将通知你。 Leaders shouldn't keep themselves aloof from the masses. 领导人决不应该脱离群众。 Keep calm!安静! You shouldn't keep chopping and changing like this; you'd better make up your mind right now! "你不能再这样变化无常了,最好现在就拿定主意!" 遵守 He keeps to his promise.他守约。 "Everyone should keep discipline, and you, officers are no exception." "每个人都应该遵守纪律,你们军官也不例外。" 保卫;保护 Keep the baby warm.别把婴儿冻着。(常与from连用)防止;抑制 Keep one's temper。抑制住不发脾气。 Keep a curb on your anger.请抑制住怒气。 扣留;留下 Please keep me a place in the queue.请在队里给我留个位置。 赡养;饲养 to keep a dog养狗 Farmers usually keep chickens in their backyard. 农民们通常在自己的后院养鸡。 经营;经销;管理 to keep a shop开商店 to keep house治家 (常与from连用)远离;不接触 Keep away from the scene of the accident.勿靠近事故现场。 Their dog looked dangerous, we decided to keep our distance from it. 他们家那条狗样子很凶恶,因此我们决定离它远一点。 But the stone walls keep the farmer's cows from joining his neighbor's cows. 但是石头墙使这家农民的母牛不会加入到邻居的牛群中去。

英语比较级的用法总结

☆形容词的比较级☆ 当我们需要对事物作出比较时,需要用到比较级。 比较级的句子结构通常是: 什么 + 动词be (am , is , are ) + 形容词比较级 + than(比)+ 什么 ,如: I’m taller and heavier than you. (我比你更高和更重。) An elephant is bigger than a tiger.(一只大象比一只老虎更大。)形容词的比较级是在形容词的基础上变化而来的,它的变化规则是: ①一般的直接在词尾加er ,如 tall - taller , strong - stronger , ②以e结尾的,直接加r ,如 fine – finer , ③以辅音字母加y结尾的,先改y为i再加er,如funny - funnier ④双写最后的字母再加er,如big – bigger, thin – thinner , hot – hotter 除此之外,还有几个特殊的单词,它的比较级和最高级都是不规则的,如:many / much(原形)– more(比较级)– most(最高级) little / few(原形)– less (比较级)– least(最高级) good(原形)– better(比较级)– best(最高级) bad (原形)– worse(比较级)– worst(最高级) far (原形)– further– furthest 附加:形容词的最高级变化类似于比较级,只是把词尾的er改成est,如: tall (原形)- taller (比较级)- tallest (最高级) long(原形)- longer(比较级)- longest(最高级) big (原形)- bigger(比较级)- biggest(最高级) ☆注意☆比较的两者应该是互相对应的可比较的东西。

before详细用法

after用法小议 通常用于过去时、现在时(主将从现)或完成时态的句子中。 1. 1. 用作介词,与一段时间连用表示“在…之后”时,注意它与 in的区别:after表示以过去时间为起点的一段时间以后,且通常与过去时态连用;而in则表示以现在为起点的一段时间以后:He came back after two days. 他两天后就回来了。He will come back in two days. 他过两天就回来。但 after 若是与一点时间连用,则可与过去时态也可与将来时态连用:He came back after 4 o’clock. 他是四点钟以后回来的。 He will come back after next month. 他将在下个月以后回来。 eg. 2. I played computer games after I had finished my homework. 做完功课后,我玩电脑游戏。(从句的动作发生在主句的动作前,因此,主句用一般过去式,从句用过去完成时.) Before和after引导的时间状语从句中,由于before和after 本身的词义已经能够表明动作发生的先后,所以主句可以用一般时代替完成时,也可以用完成时。 I knew/had known her long before you knew her.我认识她早在你认识他之前。 After you finish/have finished all your homework,you can watch TV this evening.你完成所有的作业后,今晚可以看电视。

2. 用作连词引导时间状语从句时注意:若主句用将来时态 (或含有将来意味),则时间状语从句要用一般现在时态 (表将来意义)表将来意义,而不能直接使用将来时态:他回来后我就走。正:I’ll leave after he comes back. 误:I’ll leave after he will come back. 3. 用作副词,表示“后来”、“ (一段时间)以后”,通常放在表示时间的副词之后:soon after 不久以后 two days after两天后 The plane was hijacked soon after it took off. Two days later he was gone. 4. 用于习语after all 终究,毕竟:I was right after all. 毕竟我是对的。After all, he’s only six years old. 毕竟,他才六岁。 before用法小结 请先看2005年广东省的一道高考题: The American Civil War lasted four years _______ the North won in the end. A. after B. before C. when D. then

keep的用法

1.keep +形容词 2.keep+sth/sb +形容词 3.keep +doing 一直做某事 4.keep ... from doing ... 阻止做某事。。。 5.keep a pet 饲养一个宠物 6.How long may I keep this book ? keep指借。 keep的用法小结 keep是高考常考词汇之一,其含义丰富,与其搭配的短语也很多,其主要用法如下: A、用作及物动词 (1)保留、保存、保持、留下 e.g. We'd better keep a seat for him. 我们最好给他留个座位。 He kept all the money in the bank. 他把所有的钱都存入了银行。 (2)履行(诺言)遵守 e.g. One should keep one's promise. 一个人应当遵守自己的诺言。 Everybody must keep the law. 人人都必须守法。 (3)赡养,养活,饲养 e.g. He has a large family to keep. 他有一大家人要养活。 The old man kept many animals like dogs, pigs and cats. 这位老人养了许多动物,像狗、猪、还有猫等。 (4)经营,管理

e.g. He kept a hotel in this city. 在这座城市里,他开了一家旅店。 She is good at keeping house. 她擅长管理家务。 (5)保守(秘密),记(日记、帐) e.g. All of the people keep the Spring Festival in our country. 我国所有的人都庆祝春节。 Some of them keep birthdays. 他们中有些人庆祝生日。 (7)使……处于某种状态(情况) 在这种情况下,keep常跟复合结构(keep+宾语+补语)。用作宾语补足语常见的词有现在分词、过去分词、形容词、副词以及介词短语。 e.g. He kept me waiting for half an hour. 他让我等了半个小时。 Keep your mouth shut and your eyes open. 少说话,多观察。 The doctor kept me in for a week. 医生一周没让我出去。 He always keeps his books in good order. 他总是把书放得整整齐齐。 B、用作不及物动词 (1)保持、继续(处于某种状态)(keep为连系动词)

比较级的用法知识点总结

比较级的用法知识点总结 1.可以修饰比较级的词,much,a lot,far,…的多a little, a bit,…一点儿 even甚至,still仍然 例如,Lesson One is much easier than Lesson Two.第一课比第二课容易得多。 She drives still more carefully than her husband.她开车仍然比她丈夫还认真。 2.比较级常用的句型结构 (1)“甲+be+(倍数)+形容词比较级+than+乙”表示“甲比乙…”或“甲比乙…几倍” 例如,Tom is taller than Kate.汤姆比凯特高。 “甲+实意动词+(倍数)+副词比较级+than+乙”表示“甲比乙…”或“甲比乙…几倍” 例如,I got up earlier than my mother this morning.我今天早晨起床比我妈妈还早。 (2)“甲+be+形容词比较级+than+any other+单数名词(+介词短语)”表示“甲比同一范围的任何一个人/物都……”,含义是“甲最……”。 例如,The Yangtze River is longer than any other river in China. =The Yangtze River is longer than any of the other rivers in China.长江比中国的任何一条其他的河都长。

=The Yangtze River is longer than the other rivers in China.长江比中国的其他所有的河都长。 =The Yangtze River is the longest river in China.长江是中国最长的河流。 注意:The Yangtze River is longer than any river in Japan.长江比日本的任何一条河都长。 “甲+实意动词+副词比较级+than+anyother+单数名词(+介词短语)”表示“甲比同一范围的任何一个人/物都……”,含义是“甲最……”。 例如,Mike gets to school earlier than any other student in his class. = Mike gets to school earlier than any of the other students in his class.迈克比他们班上任何一个其他的同学到校都早。 = Mike gets to school earlier than the other students in his class.迈克比他们班上其他的同学到校都早。 = Mike gets to school earliest in his class.迈克在他们班 到校最早。 注意:Mike gets to school earlier than any student in Tom’s class.迈克比汤姆班上任何一个学生到校都早。(迈克和汤姆不是同一个班) (3)“甲+be+the+形容词比较级+of the two+……”表示“甲是两者中较……的”。

before的详细用法

before的详细用法 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,也可作从属连词用。在近几年的高考试题中常常出现考查其从属连词用法的题目。其用法如下: 1.表示“在…..之前就…..”。 Mary had finished her homework before her mother returned. 2.表示“过了多久后才…….. ,动作进行到什么程度才……” They walked about 30 miles to the west before they saw a village . 3.表示“来不及;尚未…..就…” He ran off before I could stop him . 4.表示“刚…就…” I had hardly sat down before the bell rang. 5.表示“不知不觉就…..;还没弄清就……” Time passed quickly and three months went by before Aqiao knew it. 6.表示“宁愿…,决不…,与其…,毋宁….”常与will 或would 连用。 I would / will die before I surrender . 7.表示“否则;以免” I will write it down before I forget it . 8.用于句型“it was+时间段+ before …” 表示“过了多久才…” It was three days before he came back. . 9.用于句型“ it was not long +时间段+ before …” 意为“不久就….” It was not long before he sensed the danger of the position . 10. 用于句型“it will be(not )+时间段+ before….”表示“要过多久/ 不久…才…” It will be half a year before you graduate from this school .

keep的用法

用作动词(v.) keep about〔around〕1( v.+adv. ) 1. 继续履行职责go on with one's duties keep about〔around〕 She is very ill, but she still keeps about. 她虽然病得很重,但仍然继续工作。 2. 使手边常有have sth always present keep sth ? about〔around〕 I like to keep a few envelopes around in case I need them.我喜欢手边常有几个信封,以应不时之需。 keep about〔around〕2 ( v.+prep. ) keep abreast of( v.+adv.+prep. ) keep after( v.+prep. ) keep aloof( v.+adv. )

keep apart( v.+adv. ) keep at( v.+prep. ) keep away( v.+adv. ) keep away from( v.+adv.+prep. ) keep back( v.+adv. ) keep behind1( v.+adv. ) keep behind2 ( v.+prep. ) keep by1( v.+adv. ) keep by2( v.+prep. ) keep down( v.+adv. ) keep for( v.+prep. ) keep from( v.+prep. ) keep going( v.+adj. ) keep in1( v.+adv. ) keep in2( v.+prep. )

(完整版)英语比较级的用法

英语比较级的用法 一忌使用双重比较级 即构成比较级时不能既加词尾-er,又在其前加more。如: 他的英语比我的英语好多了。 误:His English is more better than mine. 正:His English is much better than mine. 【注】虽不能说more better, most earliest 之类的,但可用“比较级+and+比较级”这样的形式: It’s getting warmer and warmer. 天气变得越来越暖和。 I’m getting fatter and fatter. 我越来越胖了。 We’re going more and more slowly. 我们越走越慢了。 要想加强比较级的语气,可用much, far, even, still, rather等修饰。如: This is very much cheaper. 这个便宜得多。 This one is even more expensive. 这个更贵些。 The patient is much better now. 病人现在好多了。 二忌比较对象不一致 如果有人问你“一公斤苹果多还是一尺布多”时,你会怎么回答?你肯定认为无法回答。对,无法回答,因为它们“单位”不一样,或者说它们不是同一类型的两个比较对象。在使用英语的比较级时,也要特别注意不要“比”错了对象。如: Her French was no better than mine. 她的法语比我好不了多少。 My dictionary is more useful than yours. 我的词典对你的词典更有用。 All your neighbours are noisier than ours. 你们的所有邻居都比我们的吵闹。

Keep_用法

Keep 用法知多少 keep 是英语中用法灵活的动词之一,用法归纳如下: 一、用作系动词,意为“保持(某种状态)”,其后常接形容词作表语。如: Please keep quiet / silent! 请保持安静! After the accident, he still kept alive. 这次事故之后,他仍然活着。 二、用作实义动词,可表示: 1. 保管;保存;保留。如: Keep the change. 零钱不用找了。 Please keep these things for me while I am away. 在我离开期间,请你替我保管这些东西。 2. 赡养;饲养。如: Does he earn enough to keep himself and his family? 他的收入够养活他自己和他的家人吗? I used to keep sheep in my childhood. 我在孩提时常常养羊。 3. 经营。如: Her father kept a grocer's shop for a number of years. 她父亲开了几年杂货店。 4. 坚持;继续。后面如接动词,要用V-ing 形式作宾语。如: If you keep (on) practising your spoken English, you'll soon make great progress. 如果你坚持练习英语口语,你很快就会取得很大的进步。 5. 阻止;阻碍。常用于keep sb/sth from doing sth 结构中,其中介词from 不能省略。如: The heavy rain didn't keep them from watching the football match. 大雨没能阻止他们观看足球赛。 6. 保持。其后常接复合宾语,表示使(某人或某物)保持某种状态或使某一动作继续。 ①keep + sb/sth + 介词。如:

before的用法

before的用法 1.表示“在……之前”。说明两个时间或两个事件之间的先后关系。 1)They had got everything ready before I arrived.在我到达之前他们已经把一切都准备好了。 2)She didn’t understand me before I explained it to her.在我向她解释之前,她不理解我的意思。 3)The train had left before I arrived at the station.在我到达车站之前火车已开走了。2.表示“……才…… ”,强调从句的谓语动词所表达的时间、距离很长或花费的力量比较大。 1)The workers worked long hours for two weeks before everything returned to normal.工人们长时间地工作了两周,一切才恢复正常。 2)The big fire lasted four hours before the firemen brought it under contro1.大火持续了四个小时,消防队员才把它控制住。 3) We waited a long time before the train arrived.我们等了很长时间火车才到。 3.表示“还未来得及……就……”,强调主句谓语动词所表达的时间、距离很短或花费的精力比较小。 1)Before I could figure out what had happened,he forced me into the car.我还不知道发生了什么,他就强行把我推进了汽车。 2)He jumped into the water before I could stop him.我还没有来得及阻止他,他就跳进了水里。 3)Her father died before she was born.她尚未出世父亲就去世了。 4.表示“趁着……”。 1)We can set off early before it gets hot.我们可以趁着天不热早点出发。 2)You’d better write the phrases down before you forget them.趁着你还没有忘记,赶紧把这些词组写下来。 3)Please put them away before they are missing.趁着他们还没有丢,把它们收好吧。5.表示“一……就”、“刚刚……就”。与hardly.scarcely连用o 1)He had hardly gone to bed before(=when)the door bell rang.他刚刚睡下,门铃就响了。 2)She had scarcely got off the train before(=when)her daughter ran towards her.她刚一下车,女儿就跑了过来。 6.表示“不知不觉多少时间已经过去了”。 1)He was so absorbed in his work that four hours had passed before he knew it.他如此专注于工作,不知不觉四个小时就过去了。 2)Time passed quickly and three months went by before he knew it.时间飞快地流逝,他没感觉到三个月已过去了。 7.表示“宁可,宁愿”,相当于rather than。 1)I’d die b efore I apologized to them.我宁死也不向他们道歉。 2)1 would be poor before I got money in this way.我宁愿穷也不愿用这种方式挣钱。8.before常用于句型 “it was +段时间+before……”“过了(多长时间)才…… ”; “it will be……before…… ”“要用(多长时间)才……”; “it wasn’t……before……”“没过(多长时间)就……”; “it won’t be……before……”“用不了(多长时间)就会……”。 1)It was long before he came to help me.过了很久他才来帮我。 2)It wasn’t long before the fire was put out.不久火就给扑灭了。

before的用法

Before的用法 一、用作介词 ⒈)指时间上早于,在……之前,如: We finished the work before noon. 中午以前我们完成了工作. ⒉)指位置在前面,如: We knelt down before Grandma's grave. 我们在奶奶的墓前跪下。 ⒊)指顺序或排列在之前,如: Your name comes before mine on the list. 名单上你的名字在我之前。 ⒋)在某人面前,如: She said it before the witness. 他是当着证人的面说的。 二、用作连词 其基本含义是“在……之前”,又可以根据不同语境灵活翻译成“才”、“还没来得及就……”、“趁……”、“就”等。具体用法如下: ⒈)与情态动词can/could连用 这时候从句虽为肯定形式,根据汉语表达习惯译成“还没来得及就”,如: Before I could get in a word,he had measured me. 我还没来得及插话他就为我量好了尺寸。Before she could move, she heard a loud noise, which grew to a terrible roar. 她还没来得及迈步,就听见一声巨响,接着就是可怕的隆隆轰鸣。 →The roof fell before he had time to dash into the room to save his baby. 他还没有来得及冲进房间救孩子,房顶就塌了。 ⒉)用于肯定句中强调主句所表达的时间,距离长,或花费的精力大,译成“才” We had sailed four days and four nights before we saw lands. 我们航行了四天四夜才看到陆地。 We waited a long time before the train arrived. 我们等了很长时间火车才到。 ⒊)用于否定句中,强调主句所表达的时间,距离短,或花费的精力小,译成“不到……就”如: We hadn't run a mile before he felt tired. 我们跑了还不到一英里他就累了。 ⒋)主句含有scarcely等半否定副词时可以译为“刚……就”,这时候主句应用过去完成时态,从句用过去时,还可以用when替代before如: We had scarcely reached the school before/when the bell rang. 我们刚到学校铃声就响了。 ⒌)有时还有“宁愿”的意思 I'd shoot myself before I apologized to him. 我宁死也不向他道歉。 ⒍)用于It+ be/takes+时间段+before句型 在这一句型中又可以根据主从句的时态分成两种情况。 若主句是一般将来时态,从句是一般现在时。若主句是肯定句意思是“要过多长时间才”;若主句是否定形式则翻译成“用不了多久就”。 It will be two weeks before everything returns to normal. 两周之后一切才能恢复正常。 It will be many years before the situation improves. 这种状况或许要过许多年才能得以改善。It won't be long before we meet again. 用不了多久我们就会再见面的。 这时若主句是一般过去时,从句也是一般过去时。若主句是肯定句翻译成“过了多久才……”或“动作进行到什么程度才……”,若主句是否定形式翻译成“没过多久就”。如:

中考英语keep用法归纳

Keep用法归纳 在人教版初中英语教材中,keep是要求学生必须掌握的四会词之一,现将其多见用法归纳小结如下,以利于大家正确地使用该词。 一、用作及物动词 1.意为“保存;保留;保持;保守“。如: Could you keep these letters for me, please?你能替我保存这些信吗? I“ll keep a seat for you.我给你留个座位。 It can help to keep vegetables, fruit and meat for a long time in hot summer.在炎夏的夏天,它有助于蔬菜、水果和肉类长时间保鲜。 Can you keep a secret?你能保守秘密吗? 2.意为“照顾;养活“等。如: She kept her sister for a week while her sister was ill.她妹妹有病时,她照看她了一个星期。 I have a family to keep.我得养活一家人。 3.意为“留下;不必还“。如: You can keep the pen if you like it.你要是喜欢就把钢笔留下吧。 Keep the change.不用找零钱了。 4.意为“遵守;维护“。如: Everyone must keep the rules.人人必须遵守规章制度。 The teacher is keeping order in class.老师正在课堂上维持秩序。 5.意为“售;卖“。如: The shop keeps everything you need.那家商店里出售的东西应有尽有。

before用法

1.表示“在……之前”.说明两个时间或两个事件之间的先后关系. 1)They had got everything ready before I arrived. 在我到达之前他们已经把一切都准备好了. 2)She didn’t understand me before I explained it to her. 在我向她解释之前,她不理解我的意思. 3)The train had left before I arrived at the station. 在我到达车站之前火车已开走了. 2.表示“……才……”,强调从句的谓语动词所表达的时间、距离很长或花费的力量比较大. 1)The workers worked long hours for two weeks before everything returned to normal.工人们长时间地工作了两周,一切才恢复正常. 2)The big fire lasted four hours before the firemen brought it under contro1.大火持续了四个小时,消防队员才把它控制住. 3) We waited a long time before the train arrived.我们等了很长时间 火车才到. 3.表示“还未来得及……就……”,强调主句谓语动词所表达的时间、距离很短或花费的精力比较小. 1)Before I could figure out what had happened, he forced me into the car.我还不知道发生了什么,他就强行把我推进了汽车. 2)He jumped into the water before I could stop him. 我还没有来得及阻止他,他就跳进了水里. 3)Her father died before she was born.她尚未出世父亲就去世了. 4.表示“趁着……”. 1)We can set off early before it gets hot. 我们可以趁着天不热早点出发. 2)You’d better write the phrases down before you forget them. 趁着你还没有忘记,赶紧把这些词组写下来. 3)Please put them away before they are missing. 趁着他们还没有丢,把它们收好吧. 5.表示“一……就”、“刚刚……就”.与hardly.scarcely连用 1)He hadhardly gone to bed before(=when)the door bell rang. 他刚刚睡下,门铃就响了. 2)She had scarcely got off the train before(=when)her daughter ran towards her.她刚一下车,女儿就跑了过来. 6.表示“不知不觉多少时间已经过去了”. 1)He was so absorbed in his work that four hours had passed before he

keep用法

?keep at 1.坚持做…:继续某项工作或行为 ?keep down 1.压制,镇压:阻止…成长、完成或成功 Keep down prices; keep the revolutionaries down. 控制物价;镇压革命 ?keep off 躲开,避开 ?keep to 1.坚持,信守Keep to the original purpose.遵守原定宗旨 ?keep up 1.保持良好状态Kept up the property保存财产 2.保持;继续We asked her to stop talking, but she kept up. 我们请她别再说话了,但她依旧说下去 3.并行:按相同的水平或步伐继续下去 4.不落后,赶得上:赶上对手、同事或邻居,指在成就或生活方式上 Unsuccessfully tried to keep up with his associates.没能赶上他的同事们 ?you can't keep a good man (或woman) down (非正式)有能力的人是不会被挫折或问题吓倒 ?keep one's feet 站稳,不倒 ?keep goal (主英足)守球门 ?keep going (困难时)努力维持正常生活 ?keep open house 好客 ?keep to oneself 避开与人接触,独处 ?keep something to oneself 守口如瓶 ?keep up with the Joneses 与人攀比 ?keep wicket (板球)守板球门 ?keep someone after (美)(作为对小学生的惩罚)放学后留校

the比较级…,the比较级…”的用法

“the more…,the more…”的用法 (1)“the more…,the more…”句型为“the+形容词或副词比较级,the+比较级”结构,常表示“越……,就越……”,是一个复合句,其中前面的句子是状语从句,后面的句子是主句。 The more he gets,the more he wants.他越来越贪(他得到的越多,就越想要)。 The more she learns, the more she wants to learn.她越学就越想学。 (2)“the+比较级,the+比较级”句型主从句的时态常用一般现在时或 一般过去时。 The higher the ground is, the thinner the air becomes.离地面越高,空气就越稀薄。 The harder he worked, the more he got.他工作越努力,得到的就越多。 (3)若主句的谓语动词用一般将来时,从句的谓语动词要用一般现在时表示将来。 The harder you work, the greater progress you will make.你越用功,进步就越大。 The longer the war lasts, the more the people there will suffer.战 争持续越久,那里的人们受难就越多。 (4)在这种句型中,主句在程度上随着从句变化而变化,常把被强调的部分提前。

The faster you run, the better it will be. 你跑得越快越好。 (5)这种句型的特点是前后都可以有所省略,特别是谚语、俗语,只要意义明确,越简单越好。 The more, the better. 多多益善。 The sooner, the better. 越早越好。 (6)这种句型中的比较部分通常是状语、宾语、表语,也可以是主语。The more English you practice, the better your English is. 你练习英语越多,你的英语就越好。 The busier he is, the happier he feels. 他越忙越高兴。 The more air there is inside the tyre, the greater the pressure there is in it. 轮胎里空气越多,里面的压力就越大。 (7)若表示“越……,越不……”,常用“the more…,the less…”句型。 The more she flatters me, the less Ilike her.她越逢迎我,我越不喜欢她。 (8)若表示“越不……,就越……”,常用“the less…,the more…”句型。The less he worried, the better he worked. 他越不烦恼,工作就干得越 好。

Before的详细用法总结

Before的详细用法总结 今天给大家带来Before的用法,我们一起来学习吧,下面就和大家分享,来欣赏一下吧。 Before的用法 我们最初接触的Before一般是作为介词使用的,一般表示空间上的“在…之前” 。 例如:The tea has been set before her.茶已经摆在她面前了。 Before作为介词时,需要注意的是,一般不用在表示具体时间的词之前。比如,两年之前,我们用two years ago,而不能说.efore two years. Before作为介词时,有一个特殊用法需要注意,即before long 表示“不久之后”。 例如:Before long he got married.不久之后他就结婚了。 Before作为连词时,一般意为“在…之前”,用来引导时间状语从句。引导的从句中的动作一般发生在主句动作之后。 Before作为连词时的用法较为复杂,具体要点如下:

一、主句用一般现在时/一般将来时,从句用一般现在时。 例如:You should let me explain what I did before you criticize me. 在你批评我之前,你应该让我解释一下我做过什么。 二、主句用过去完成时,从句用一般过去时。一般翻译为“在…之前就… ”。 例如:1.His father had died before he was born. 他父亲在他出生之前就已经去世了。 2.She had finished her homework before her mother returned. 她在妈妈返回之前就已经把作业完成了。 三、主句用一般过去时,从句用过去完成时。从句用过去完成时表示一个过去没有完成或没来得及做的、时间顺序在后的动作,常译为“★还没(来得及)…就…★ ”。 例如:1.He rushed out of the office before I had realized what was happening. 我还没意识到发生了什么事,他就冲出去了。 2.She left before I had had a chance to speak to her. 我还没来得及跟她说话,她就离开了。

(完整版)before的用法归纳

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

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