While的用法：
一、while作名词用，表示“一会儿”“一段时间”
1.She likes to lie down for a while after lunch.
她喜欢午饭后躺一会儿。
https://www.doczj.com/doc/537653360.html,ing to another country to study requires a big adjustment and it takes a while to fit in.
来到另一个国家求学，需要花一段时间来适应。
二、While作连词
(1)引导时间状语
1.We must strike while the iron is hot.趁热打铁。
2.While she was listening to the radio，she fell asleep.
她听着收音机睡着了。
(2)引起让步状语从句，意思是“虽然…但是….”、“尽管…但是…”(多放于句首)
1.While he loves his students，he is very strict with them..
虽然他爱他的学生，可是他对他们很严格。
2.While these experiments are interesting and useful，it is important to remember that they may not always tell us much.(BookIIIp125)
虽然这些实验很有趣也有用，但是很重要的是要记住，这些实验也可能不会告诉你很多。
(3)引起条件状语，意思是“只要”
1.While there is life there is hope.只要生命存在，就有希望。
2.While there is a way there is away.有志者事竟成。
三、While作并列连词用，意思为“而，然而”，表对比。而but表转折。注意用心比较体会while与but的句中用意
1.Some people waste food while others haven't enough.
有些人很费粮食，然而有些人却吃不饱。
2.The son was having a good meal at home，while the parents were working in the fields.
儿子在家吃好饭而父母却在田里辛勤劳作。
3.I ought to have helped her，but I never could.
我本该帮她但没能。
4.Honey is sweet，but the bee stings.
蜂蜜很甜，但蜜蜂有刺蜇人。
四.while，when，as的用法区别
都译为“当…的时候”，
区别为：
when后的从句谓语动词既可是延续性动词，也可是短暂性动词，而且还可作并列连词，译为“这时”。
但以下句型一定用when，作并列连词：
句型A：be about to do…when…正要做…这时(发生另一事)
句型B：was/were doing…when…正在…这时(发生另一事)
句型C：had done…when…刚要做…这时(发生另一事)
1.We were about to set out when it began to rain.
我们刚要出发天突然下雨了。
2.He had hardly sat down when his mobile rang.
他刚一坐下手机就响了。
3.I was walking along the bank of the river when I fell into it.
我正沿河岸散步突然掉进水里。
while后的从句谓语动词只能是延续性动词，强调主从句的两个动词同时发生；while也可作并列连词，表示两个动作的对比，译为“而”“然而”。
1.While his mother was cooking in the kitchen，the boy fell asleep in the chair.
(在一个延续动作过程中发生另一个动作)
as则表示两个变化中的动作的同时性，译为“一边…一边…”。
2.He hurried home，looking behind as he went.
他匆匆回家，边走边往后看。
■巩固练习：
一.改错
1.She is fat but I am thin.
2.It was raining while we arrived.
3.She sang while she walked.
4.I don't know them well，while they are my neighbors.
二.选择最佳答案：
1.She thought I was praising her child，_____，in fact，I was scolding him for his bad behaviors at school.
A.what
B.while
C.so that
D.therefore
2.I do every single bit of housework____my husband Bob just does the dishes now and then.(2004全国卷II35)
A.while
B.since
C.when
D.as
3.______it is expected that students come university
with the ability to take a good set of notes，this is not always the case.
A.When
B.As
C.For
D.While
4.We were swimming in the lake___suddenly the
storm started.
A.when
B.while
C.until
D.before
5.---You seem to have had that car for years.
---Yes，it's in good condition，but I should sell it____it still runs.
A.if
B.before
C.because
D.while
答案：一1.but改成while。因为fat与thin形成对比
2.while改成when。因为arrived为短暂动词
3.while改成as。表示“一边…一边…”
4.While they are my neighbors，I don't know them well.主句和从句颠倒位置。
二.1.选B。while并列连词，表对比，意为，“而，但是”
2.选A.while含有对比之意，意为“然而”。
3.选D.在此句中while表示“尽管”。
4.选A。wasdoing···when···一个固定句式。
5.选D.意思为“趁着···”
Although （尽管, 虽然；但是, 然而）
与though（虽然; 尽管；然而; 但是）的用法及区别：
1.两词同义并可换用，但although语气较重，通常放在句首并用于正式场合。如：
I'd quite like to go out, (al)though it is a bit late. 我很想外出，虽然为时稍晚。
Although it was snowing, it was not very cold. 虽然下着雪，但并不很冷。
2.用though 时，可将强调的词前置，但although 不能。as也有此种倒装结构。如：
Poor though / as he is , he is happy.虽然他穷，但过得很愉快。
Child though / as she was, the actress was drawing a crowd. 尽管还是个孩子，这个女演员却引起了人们的注目。（child前无冠词a）
3. although 引导从句常指事实，而though 引导的句子可表假设。如：
Let's start as arranged though it rains tomorrow. 即使明天下雨，咱们也按预定的计划出发吧。（假设）
He was not unhappy although he had to live alone. 虽然得一个人生活，他毫无不快之感。（事实）
4.although 只用作连词，而though 除作连词外，还可用作副词，常置句末，句子较长时，也置于句中。如：
It's hard work, I enjoy it though. 这是苦差事，可我干得颇有乐趣。
There's no excuse, though, for hurting her feelings. 伤到她的感情一事，还是不可原谅。
5.though 可用于even though, as though 等结构，although则不能。如：
Even though I fail, I'll keep on trying. 我纵然失败，仍会继续尝试下去。
You look as though (=as if ) you know each other. 看起来你们好像彼此认识。
6. although 和 though 用作连词时不能和but连用，但可跟yet, still 等连用。如：
Although he lives alone, yet he is happy. = He lives alone, but he is happy. 他虽然单独生活，但很愉快。
7.though 常用于省略句。
如：Though (he is) alone, he is happy.
While用法小结 一、while作名词用，表示"一会儿""一段时间" 1.She likes to lie down for a while after lunch. 她喜欢午饭后躺一会儿。 https://www.doczj.com/doc/537653360.html,ing to another country to study requires a big adjustment and it takes a while to fit in. 来到另一个国家求学，需要花一段时间来适应。 二、While作连词 (1)引导时间状语 1.We must strike while the iron is hot. 趁热打铁。 2.While she was listening to the radio，she fell asleep. 她听着收音机睡着了。 (2) 引起让步状语从句，意思是"虽然…但是…."、"尽管…但是…"(多放于句首) 1.While he loves his students，he is very strict with them.. 虽然他爱他的学生，可是他对他们很严格。 2.While these experiments are interesting and useful，it is important to remember that they may not always tell us much. 虽然这些实验很有趣也有用，但是很重要的是要记住，这些实验也可能不会告诉你很多。 (3)引起条件状语，意思是"只要" 1.While there is life there is hope.只要生命存在，就有希望。 2.While there is a way there is away. 有志者事竟成。 三、While作并列连词用，意思为"而，然而"，表对比。而but表转折。注意用心比较体会while与but的句中用意 1.Some people waste food while others haven't enough. 有些人很费粮食，然而有些人却吃不饱。 2.The son was having a good meal at home，while the parents were working in the fields. 儿子在家吃好饭而父母却在田里辛勤劳作。 3.I ought to have helped her，but I never could. 我本该帮她但没能。 4.Honey is sweet，but the bee stings. 蜂蜜很甜，但蜜蜂有刺蜇人。 四.while，when，as的用法区别
由高考题看while的用法 [常见错误] 误①：While I came in, he was reading a book. 误②：She took a bath while preparing a meal. 误③：She drinks black coffee when I prefer it with cream. 误④：While he understands your idea, but he doesn't agree with you. [主要用法] 1. 用作从属连词，意思是“当……时；和……同时”，引导时间状语从句。注意该状语从句的谓语动词必须是延续性动词，不能是终止性动词，如果是终止性动词，酌情用when或as。 They phoned while you were out. 你不在家时他们打来了电话。（be out为延续性动词）When I came in, he was reading a book. 我进来时，他正在看一本书。（come 为终止性动词）（参见“误①”） 2. 如果从句的主语与主句的主语为同一人且从句的谓语含有系动词be时，可省略从句的主语及系动词be；如果从句的主语与主句的主语不是同一人，则不可省略。 The child watched TV while (he was) eating. 这个男孩边吃边看电视。 She took a bath while I was preparing a meal. 我准备饭菜的时候，她在洗澡。（参见“误②”） 3. 用作并列连词，意思是“但；却；然而”，表示对比或与前面的情况相反，注意when和as不能表示这一含义。 She drinks black coffee while I prefer it with cream. 她喜欢喝清咖啡而我喜欢加奶油的。（参见“误③”） I earn only 100 dollars a month, while you earn 400 dollars. 我一个月只赚一百美元，你却赚四百美元。 4. 用作从属连词，表示让步，意思是“虽然”，其意义相当于although，主要用于书面语中。注意主句的前面不可有but等连接词。 While he understands your idea, he doesn't agree with you. 虽然他了解你的想法，但他还是不赞同你。（参见“误④”） 5. while作名词时，意思是“一点时间；一会儿”，表示泛指时常与a连用；表示特指时可与the, this, that连用。常用的短语有：after a while过了一会儿；all the while一直；in a while 不久；once in a while偶尔等。 It took her quite a while to find a hotel. 她花了很长时间才找到一家旅馆。 Where have you been all this while? 这阵子你一直在哪儿？
c中while的用法 c中while的用法的用法你知道吗？下面就跟你们详细介绍下c 中while的用法的用法，希望对你们有用。 c中while的用法的用法如下： while语句的一般形式为： while(表达式) 语句 其中表达式是循环条件，语句为循环体。 while语句的语义是：计算表达式的值，当值为真(非0)时，执行循环体语句。其执行过程可用下图表示。 【例6-2】用while语句计算从1加到100的值。用传统流程图和N-S结构流程图表示算法，见图： 01.#include <stdio.h> 02.int main(void){ 03.int i,sum=0; 04.i=1; 05.while(i<=100){ 06.sum=sum+i; 07.i++; 08.} 09.printf("%d\n",sum);
10.return 0; 11.} 【例6-3】统计从键盘输入一行字符的个数。 01.#include <stdio.h> 02.int main(void){ 03.int n=0; 04.printf("input a string:\n"); 05.while(getchar()!='\n') n++; 06.printf("%d",n); 07.return 0; 08.} 本例程序中的循环条件为getchar()!='\n'，其意义是，，只要从键盘输入的字符不是回车就继续循环。循环体n++完成对输入字符个数计数。从而程序实现了对输入一行字符的字符个数计数。 使用while语句应注意以下两点。 1) while语句中的表达式一般是关系表达或逻辑表达式，只要表达式的值为真（非0）即可继续循环。 01.#include <stdio.h> 02.int main(void){ 03.int a=0,n; 04.printf("\n input n:");
(1) 若主句表示的是一个短暂性动作，从句表示的是一个持续性动作，三者都可用： He fell asleep when [while, as] he was reading. 他看书时睡着了。 【注】as 用于引出一个持续性动词表示“在……期间”时，其谓语通常只能是那些含有动作(action)和发展(development) 意味的动词，一般不能是那些不用于进行时态的动词(如be, seem, love, want, agree, see, know, have 等)，所以下面一句中的while 不能换为as： A：I’m going to the post office. 我要去邮局。 B：While you’re there, can you get me some stamps? 当你在邮局时，能帮我买几张邮票吗? (2) 若主、从句表示两个同时进行的持续性动作，且强调主句表示的动作延续到从句所指的整个时间，通常要用while： Don’t talk while you’re eating. 吃饭时不要说话。 I kept silent while he was writing. 在他写的时候，我默不作声。 但是，若主从句表示的两个同时进行的动作含有“一边…一边”之意思，通常用as： She sang as she went along. 她边走边唱。 (3) 若从句是一个短暂性动作，主句是一个持续性动作，可用as / when 但不用while： It was raining hard when [as] we arrived. 我们到达时正下着大雨。 (4) 若主从句表示的是两个同时(或几乎同时)发生的短暂性动作，用as / when： I thought of it just when [as] you opened your mouth. 就在你要说的时候，我也想到了。 (5) 若要表示两个正在发展变化的情况，相当于汉语的“随着”，一般用as：Things are getting better and better as time goes on. 随着时间的推移，情况越来越好。 As it grew darker, it became colder. 天色越晚，天气越冷。 (6) 表示“每当…的时候”(暗示一种规律性)，一般要用when： It’s cold when it snows. 下雪时天冷。 He smiles when you praise him. 你夸奖他时他总是笑笑。 (7) 若主从句所表示的动作不是同时发生，而是有先后顺序时，一般要用when： I will go home when he comes back. 他回来时，我就回家去。 (8) when 可用作并列连词，表示“这时(突然)”；while 也可以用作并列连词，表示“而”、“却”(表示对比)；但as 则没有类似用法： We were about to start when it began to rain. 我们正要出发，这时天开始下雨了。 He likes coffee, while she likes tea. 他喜欢咖啡，而她却喜欢茶。 (9) as 和when 后均可直接跟一个名词，构成省略句，但while 一般不这样用：As [When] a boy, he lived in Japan. 他小时候在日本。 (10) when 和while 后可接现在分词、介词短语、形容词等构成省略句，但as 一般不这样用： When [While] reading, he fell asleep. 他看书时睡着了。 When [While] in trouble, ask her for help. 遇到麻烦的时候你就去找她帮忙。
While和When在过去进行时中两者的区别如下： ①when是at or during the time that, 既指时间点，也可指一段时间；while是during the time that，只指一段时间，因此when引导的时间状语从句中的动词可以是终止性动词，也可以是延续性动词，而while 从句中的动词必须是延续性动词。 ②when 说明从句的动作和主句的动作可以是同时，也可以是先后发生；while 则强调主句的动作在从句动作的发生的过程中或主从句两个动作同时发生。 ③由when引导的时间状语从句，主句用过去进行时，从句应用一般过去时；如果从句和主句的动作同时发生，两句都用过去进行时的时候，多用while引导，如： a. When the teacher came in, we were talking. 当此句改变主从句的位置时，则为： While we were talking, the teacher came in. b. They were singing while we were dancing. ④when和while 还可作并列连词。when表示“在那时”；while表示“而，却”，表对照关系。如： a. The children were running to move the bag of rice when they heard the sound of a motor bike. 孩子们正要跑过去搬开那袋米，这时他们听到了摩托车的声音。 b. He is strong while his brother is weak. 他长得很结实，而他弟弟却很瘦弱。 when; while 当……时候 while能用when代替; 但是when却不一定能用while代替. while+从句, 动作一定会延续 when+延续性动词/瞬间动词; when he arrived
While的用法 一、while用作名词时，意为“一段时间，一会儿”。例如： I stayed there for a short while.（我在那儿呆了一小会儿。） The postman came a short while ago.（邮递员刚刚来过。） 二、while用作连词时，有以下几种含义： 1、意为“当……时候，和……同时”，引导时间状语从句。例如： While I was watching TV，the bell rang.我看电视时，铃响了。） Tom watched TV while she ate her supper.（汤姆边吃晚饭边看电视。） 2、意为“虽然，尽管”，引导让步状语从句。例如： While it was late，he went on working.（虽然很晚了，但他还在继续工作。） While he is in poor health，he works hard.（虽然他身体不好，但他还是努力工作。） 3、连接两个并列句子，表示“对比”关系。例如： He went out for a walk，while I stayed at home.（他出去散步了，而我却呆在家里。） I like singing while she likes dancing.（我喜欢唱歌，而她喜欢跳舞。） You like sports，while I prefer music.（你喜欢体育，而我更喜欢音乐。） 三、while引导状语从句时，应注意以下几点： 1、while引导的时间状语从句既可放在句首，也可放在句末；而while引导的让步状语从句一般放在句首，不放在句末。另外，也可以从意义上加以区分。例如：While he was tired，he went on working.（虽然他累了，但他还是继续工作。） （while引导让步状语从句） While he was tired，he would have a rest.（他累了就休息一会儿。） （while引导时间状语从句） 2、while引导让步状语从句时，如果从句的主语和主句的主语相同，那么从句的主语和谓语动词be都可以省略。例如： While he was ill，he went there.（=While ill，he went there.） （虽然他有病，但他还是去那里了。） 3、while和when都可以引导时间状语从句，但应注意：while引导的时间状语从句中的谓语动词必须是延续性的动词；而when引导的时间状语从句中的谓语动词既可以是延续性动词，也可以是非延续性动词。当时间状语从句中的谓语动词是延续性动
while的使用用法大汇总 连词“while”具有两种意义，因此为了避免误用，使用时需多加注意。 “while”作为连词来使用的时候，表示“同时性”或“对比性、对立”。根据文章的内容可明确该词具体表达了哪一种意义的情况固然存在，但如同下文中所展示的相反情况同样存在。 The temperature decreased while the growth rate increased. 这句话可产生“温度下降的同时生长速度加快了”和“与温度下降所不同的是，生长速度却加快了”两种翻译。 正解是：若要使后者的翻译成立，“decreased”和“while”之间的逗号必不可少，因此目前的情况下无法直接确定此句的翻译。 while 的用法公开 1Most archaeological sites have been located by means of careful searching, while many others have been discovered by accident. (然而) 2.While traditional “paid” media—such as television commercials and print advertisements—still play a major role, companies today can exploit many alternative forms of media. (虽然) 3.while we may be able to sustain the illusion of control through the conscious mind alone, in reality we are continually faced with a question: “Why cannot I make myself do this or achieve that? ” (虽然) 4.More recently, while examining housing construction, the researchers discovered that illiterate, non-English- speaking Mexican workers in Houston, Texas, consistently met best-practice labor productivity standards despite the complexity of the building industry's work. (当) 5.While it is easy to ignore in our contact with them the effect of our acts upon their disposition, it is not so easy as in dealing with adults. (虽然)
While的用法： 一、while作名词用，表示“一会儿”“一段时间” 1.She likes to lie down for a while after lunch. 她喜欢午饭后躺一会儿。 https://www.doczj.com/doc/537653360.html,ing to another country to study requires a big adjustment and it takes a while to fit in. 来到另一个国家求学，需要花一段时间来适应。 二、While作连词 (1)引导时间状语 1.We must strike while the iron is hot.趁热打铁。 2.While she was listening to the radio，she fell asleep. 她听着收音机睡着了。 (2)引起让步状语从句，意思是“虽然…但是….”、“尽管…但是…”(多放于句首) 1.While he loves his students，he is very strict with them.. 虽然他爱他的学生，可是他对他们很严格。 2.While these experiments are interesting and useful，it is important to remember that they may not always tell us much.(BookIIIp125) 虽然这些实验很有趣也有用，但是很重要的是要记住，这些实验也可能不会告诉你很多。 (3)引起条件状语，意思是“只要” 1.While there is life there is hope.只要生命存在，就有希望。 2.While there is a way there is away.有志者事竟成。 三、While作并列连词用，意思为“而，然而”，表对比。而but表转折。注意用心比较体会while与but的句中用意 1.Some people waste food while others haven't enough. 有些人很费粮食，然而有些人却吃不饱。 2.The son was having a good meal at home，while the parents were working in the fields. 儿子在家吃好饭而父母却在田里辛勤劳作。 3.I ought to have helped her，but I never could.
when和while的用法 when, while这两个词都有"当……时候"之意，但用法有所不同，使用时要特别注意。 ①when意为"在……时刻或时期"，它可兼指"时间点"与"时间段"，所引导的从句的动词既可以是终止性动词，也可是持续性动词。如： When I got home, he was having supper.我到家时，他正在吃饭。When I was young, I liked dancing.我年轻时喜欢跳舞。 ②while只指"时间段"，不指"时间点"，从句的动词只限于持续性动词。如： While I slept, Miao Kiukun broke in.在我睡觉时,MIAO闯了进来。辨析 ①when从句与主句动作先后发生时，不能与while互换。如： When he has finished his work, he takes a short rest.每当他做完工作后，总要稍稍休息一下。(when = after) When I got to the cinema, the film had already begun.当我到电影院时，电影已经开始了。(when=before) ②when从句动词为终止性动词时，不能由while替换。如： When he came yesterday, we were playing basketball.昨天他来时，我们正在打篮球。 ③当从句的谓语是表动作的延续性动词时，when, while才有可能互相替代。如： While / When we were still laughing, the teacher came in.正当我们仍在大声嬉笑时，老师进来了。 ④当从句的谓语动词是终止性动词，而且主句的谓语动词也是终止性动词时,when可和as通用，而且用as比用when在时间上更为紧凑，有"正当这时"的含义。如： He came just as (or when) I reached the door.我刚到门那儿，他就来了。 ⑤从句的谓语动词如表示状态时，通常用while。如： We must strike while the iron is hot.我们应该趁热打铁。
优质解答 一、while 用作名词时,意为“一段时间,一会儿”.例如： I stayed there for a short while. （我在那儿呆了一小会儿.） The postman came a short while ago. （邮递员刚刚来过.） 二、while 用作连词时,有以下几种含义： 1. 意为“当……时候,和……同时”,引导时间状语从句.例如： While I was watching TV, the bell rang. （我看电视时,铃响了.） Meimei watched TV while she ate her supper. （梅梅边吃晚饭边看电视.） 2. 意为“虽然,尽管”,引导让步状语从句.例如： While it was late, he went on working. （虽然很晚了,但他还在继续工作.） While he is in poor health, he works hard. （虽然他身体不好,但他还是努力工作.） 3. 连接两个并列句子,表示“对比”关系.例如： He went out for a walk, while I stayed at home. （他出去散步了,而我却呆在家里.） I like singing while she likes dancing. （我喜欢唱歌,而她喜欢跳舞.）
You like sports, while I prefer music. （你喜欢体育,而我更喜欢音乐.） 三、while 引导状语从句时,应注意以下几点： 1. while 引导的时间状语从句既可放在句首,也可放在句末；而while 引导的让步状语从句一般放在句首,不放在句末.另外,也可以从意义上加以区分.例如： While he was tired, he went on working. （虽然他累了,但他还是继续工作.） （while 引导让步状语从句） While he was tired, he would have a rest. （他累了就休息一会儿.） （while 引导时间状语从句） 2. while 引导让步状语从句时,如果从句的主语和主句的主语相同,那么从句的主语和谓语动词be 都可以省略.例如： While he was ill, he went there. （= While ill, he went there.） （虽然他有病,但他还是去那里了.） 3. while 和when 都可以引导时间状语从句,但应注意：while 引导的时间状语从句中的谓语动词必须是延续性的动词；而when 引导的时间状语从句中的谓语动词既可以是延续性动词,也可以是非延续性动词.当时间状语从句中的谓语动词是延续性动词时, while 和when 可以互相替换.例如： While we were talking, the teacher came in. （我们正在谈话时,老师进来了.） The bus had left when we arrived at the bus stop.
while语句的一般形式为： while(表达式) 语句 其中表达式是循环条件，语句为循环体。 while语句的语义是：计算表达式的值，当值为真(非0)时，执行循环体语句。其执行过程可用下图表示。 【例6-2】用while语句计算从1加到100的值。用传统流程图和N-S结构流程图表示算
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3.int n=0; 4.printf("input a string:\n"); 5.while(getchar()!='\n') n++; 6.printf("%d",n); 7.return0; 8.} 本例程序中的循环条件为getchar()!='\n'，其意义是，，只要从键盘输入的字符不是回车就继续循环。循环体n++完成对输入字符个数计数。从而程序实现了对输入一行字符的字符个数计数。 使用while语句应注意以下两点。 1) while语句中的表达式一般是关系表达或逻辑表达式，只要表达式的值为真（非0）即可 继续循环。 1.#include
连词while的用法 连词while的用法有好几种，使用时不可掉心轻心，它大数有以下几种用法： 1、表示时间，意思是“当……的时候”，while可以位于句首，也可以位于句中。 我们在看电视时，她一个人在房间里读小说。 ，the telephone rang . 他正在整理行装，电话铃响了。 ，she fell asleep . 她听着收音机睡着了。 While引导从句时，如主句和从句的主语一致，从句的谓语又含有be，那么从句的主语和be可省略，While 后可直接跟现在分词、名词、形容词或介词短语。 a. We are students while ( we are ) serving as teachers. 我们一面当老师，一面当学生。 b. While (he was )yet a youth he gained many prices. 当他还是个青年时，他就多次获奖。 c. She never dreams 她睡着时从来不做梦。 d. Tom had an accident 在来这儿的途中，汤姆出了事故。 2、表示对比或转折，意思是“而”，这时，While一般位于句中，如： Kate was dressed in green while Jenny was dressed in red .凯特穿绿色衣服，而詹妮穿绿色衣服。 She likes singing and dancing while her brother would rather read novels …, 而她弟弟喜欢小说。 Young people are like the sun rising in the east while old people are like the sun setting in the west .年轻人犹如旭日东升，而老年人犹如日薄西山。 a. She though I was talking about her daughter , in fact , I was talking about my daughter .(NMET’95) A. whom B. where C. which D. while b. I do every single bit of housework my husband Bob just does the dishes now and then .[04广西] A．since B．while C．when D．as 3、表示让步，通常用在句首，意思是“尽管”、“虽然”，如： While he had a handsome income, h e couldn’t afford to buy a piano.他虽然收入不少，但卖不起钢琴。 While they are my neighbours, I don’t know them well. 尽管他们是我的邻居，但我不了解他们。 ，I think they went too far.我虽然同情他们，但也感到他们做得有些过分了。 ，he was not loved. 他虽然受到尊敬，但没有受到喜爱。 ，he is very strict with them . 虽然他爱他的学生，可是他对学生们很严格。 4、表示条件，意思是“只要”（=as long as）. While 可以位于句首，也可以位于句中。 You don’t have to worry while we are here .只要我们在，你就别着急。 There will be life while is water and air. 只要有空气和水，就有生命。 While there is life, there is hope. 留得生命在，不怕没希望。 5、“同时，也”. While the book is welcomed by scholars, it will make an immediate appeal to the general readers. 这本书受到学者的欢迎，同时也会引起一般读者的兴趣。 6、“趁着”. Make hay while the sun shines.晒草要趁阳光好。（谚）strike while the iron is hot.趁热打铁。（谚）While the roses are yet in bloom , will you come with me to see them?趁着玫瑰花还开着，你我一道去看好吗？ 1.——I am going to the post office ——you’re there ,can you get me some stamps ?(99) A．as B．while C．because D．If 2.the WTO cannot live up to its name it does not include a country that is home to one fifth of mankind .(2000) A．as long as B．while C．If D．even though 3. I know the money is safe , I shall not worry about it .(03北京) A．Even though B．Unless C．while D．As long as 4. We were told that we should follow the main road we reached the central railway station .(04辽宁) A．Even though B．until C．while D．wherever 5. modeling business is by no means easy to get into, the good model will always be in demand.(04浙江) A．While B．Since C．As D．If 6. I accept that he is not perfect, I do actually like the person.(04 湖南) A．While B．Since C．As D．Unless 7. The cost of living in Glasgow is among the lowest in Britain, the quality of life is probably one of the highest.(06 天津) A．since B．when C．as D．while 8. I really don’t like art , I find his work impressive.[07山东]A．As B．since C．If D．while 9. In some places women are expected to earn money men work at home and raise their children .[08四川] A．but B．while C．because D．though 10. the Internet is of grea t help ,I don’t think it’s a good idea to spend too much time on it .(08湖南) A．If B．while C．Because D．As 11.－Are you ready for Spain? ---Yes, I want the girls to experience that they are young.(08年上海) A．while B．until C．if D．before 高考英语when 的用法命题走向与解题策略 [高考走向] When 的用法在高考中也是重现率较高的语言点，尤其是when用作关系副词来引导定语从句。综观近几年的高考英语试题，其考查方式多通过“单项填空”进行，偶尔也出现在“短文改错”和“完形填空”中。 一、When(at that time)用作副词 1．用作关系副词，引导定语从句起状语作用，既不能作动词的宾语，也不能作介词的宾语。译为“当…时”相当于“介词at, in, on, during+which结构”
while用法小结 (1)引导时间状语从句,从句中的谓语动词应用延续性动词或表示状态的词。 eg.While the discussion was still going on,George came in. 当讨论还在进行时,乔治走了进来。 Strike while the iron is hot. 趁热打铁。 ★注意:while,when,as表“当……的时候”的区别 while强调同时性或某时间段内一种情况发生时另一种情况出现,与延续性动词连用;when可与延续或非延续性动词连用,在强调“当时”,“这时”之意时when;as强调同时性,指“一边……一边……”一件事情发生,另一件事情立刻发生。 eg.———I’m going to the post office. ———______you’re there,can you get me some stamps? A.As B.While C.Because D.If 解析:从该题的题意可以看出C、D两选项不合题意；而as侧重同时性,不合题意;while可指一时间段发生某情况时,另一情况出现,正合题意。 (2)引导让步状语从句,多用于句首。意为“尽管,虽然”。 eg.While I admit his good points ,I can see his bad. 尽管我承认他的长处,但我也看到了他的不足。 While he loves his students,he is very strict with them.
虽然他爱他的学生,可是他对他们很严格。 (3)While作并列连词用,意思为“而,然而”,表前后意义上的对比或转折。 eg.There’s plenty of rain in the sout heast,while there's little in the northeast. 东南部雨量充足,而西北部则很少下雨。 Some people waste food while others haven't enough. 有些人浪费粮食,然而有些人却吃不饱。 eg．She thought I was talking about her daughter,_______,in fact,I was talking about my daughter. A.whom B.where C.which D.while 解析:句意为“她认为我在谈她女儿,而实际上我在谈我的女儿。”whom,which和where分别是引导定语从句的关系代词和关系副词,后一句并非修饰定语从句,故应排除A、B和C选项。 ★注意:while与but的区别 二者都有“而,然而”之意,但while强调二者的对比,而but强调前后的转折关系。 (4)引导条件状语,意思是“只要” eg.While there is a will,there is a way.有志者事竟成。 We can surely overcome these difficulties while we are closely united. 只要我们紧密地团结一致,一定能克服这些困难。
状语从句中的when, while和as的用法 一．when，while，as在时间状语从句中的区别： ①三者均可表示“当……的时候”，如果主句表示的是短暂的动作，而从句表示的是一段时间，三者可通用。如： I met Kang Li as／when／while I was walking along the street． 当我沿街散步时碰见了康丽。 ②when可以和延续性动词连用，也可以和短暂性动词连用；而while和as只能和延续性动词连用。如： It was snowing when we got to the airport．当我们到达机场时，天正下着雪。 （不能用while） ③as强调主句与从句表示的动作同时发生，as常表示“随着……”；“一边……， 一边……；while强调主句表示的动作持续于while所指的整个时间内；when 可指主、从句所述动作同时或先后发生。如： As the time went on，the weather got worse．（as表示“随着……”之意） He sang as he went along．他边走边唱。 Please write while I read．我读的时候，请写下来。 When he reached home，he had a little rest．回到家后，他休息了一会儿。 ④when用于表示“一……就……”的句型中（指过去的事情）。 somebody had hardly（＝scarcely）done …when．．． ＝Hardly ／Scarcely had somebody done …when．．． ①I had hardly ／scarcely closed my eyes when someone knocked at the door． ＝Hardly ／Scarcely had I closed my eyes when someone knocked at the door．我刚一闭上眼，就有人在敲门了。 二.when, while和as都可引导让步状语从句： ①when引导让步状语从句，意为“尽管，虽然”相当于though或although: They stopped trying when they might have succeeded next time. ②while引导让步状语从句，相当于although ，是较为正式的书面语: While I am willing to go, I would like it better that you went. ③as引导让步状语从句必须倒装，从句中的表语，状语或动词原形置于句首，若表语为名词，前置时省略冠词。 Child as he is, he knows a lot. Much as I like it, I will not buy it, for it’s too expensive.