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while在句首什么意思

小草范文网  发布于:2016-12-19  分类: 意思 手机版

篇一:while一词的用法

While一词的用法

连词while大致有以下四种用法:

1.引导时间状语从句,意为"当……的时候;和……同时",此时的主从句谓语动作同时发生,从句谓语通常是延续性动词。如:

Mary watched TV while she ate her supper.玛丽边吃饭边看电视。

While she was listening to the radio, she fell asleep.她听着收音机睡着了。

while引导从句时,如果主从句的主语一致,且从句谓语又含有be,则从句主语和be可省略。while后可直接跟现在分词、名词、形容词或介词短语。如:

We are teachers while (we are) serving as students.我们边当老师边当学生。

While (he was) yet a youth, he gained many prizes.他年轻时就曾多次获奖。

He caught a cold while(he was) on vacation.他度假时患了感冒。

2.表示对比或转折,意为"而;然而"。此时,while一般位于句中。如:

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。 You like sports, while I prefer music.你喜欢体育,而我更喜欢音乐。

3.表示让步,通常位于句首, 意为"尽管;虽然"。如:

While I agree with your reasons, I can't allow it.尽管我同意你的理由,但我不能允许这样做。 While he loves his students, he is very strict with them.虽然他爱他的学生,可是他对学生们很严格。

While (he was) respected, he is not liked.他虽受人尊敬,但并不被人喜欢。

4.表示条件, 意为"只要",其意思和用法相当于as long as。while可位于句首,也可位于句中。如:

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 there 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.意为"同时;也"。如:

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.意为"趁着"。如:

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,你和我一道去看看好吗?

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篇二:While用法小结

While用法小结:

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.引导条件状语从句 相当于as long as,译作“只要”。例如:

While there is life, there is hope. (有生命,就有希望。)

While a spark of life remains, it is a doctor's duty to save the patient.

(只要病人还有一息生机,医生就有责任挽救。 )

4.引导原因状语从句, 相当于since, 有“既然”的意思。例如:

You'll never save any money while you're so extravagant. (你这么奢侈,永远存不下钱来。 )

I'd like to get it settled today while we're at it. (既然我们着手干了,我想今天就把它干完。 )

5. 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. (当我们到达车站时,公(转自:wWw.XiAocAoFanWeN.cOm 小 草 范文网:while在句首什么意思)共汽车已经开走了。)

( arrive是非延续性动词,因此,此句中的 when 不能用 while 替换。)

When / While we were having a meeting, our teacher came in.

(我们正在开会时,老师走了进来。)

( have 是延续性动词,因此,句中的 when 可以用 while 替换。)

4. while 引导的状语从句还可以表示“某个动作正在进行的同时,另一个动作也在进行之中”。例如:

While the teacher was speaking, the students were listening.

(老师讲课时,学生们在听。)

While he was writing, I was reading.

篇三:while用法小结

while用法小结

--2006-11-21 山西晚报--

熟练掌握动词与短语动词的意思及其用法是高考英语词汇考查的趋势之一。只有在平时的学习中不断总结,才能促进英语水平更快提高。现以while一词为例说明,以供参考。

(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 southeast,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.whomB.where

C.whichD.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 away.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。

(5)while从句中的省略。当while从句中的主语与主句的主语一致,且含有be的某种形式时,从句中的主语连同be可同时省略。

eg.While listening to the radio,she fell asleep.

她在听收音机时睡着了。

While in London,he studied music and painting.

在伦敦时,他学习音乐和绘画。

(6)while可用作名词,意为“一会儿;一段时间”

作名词用时,主要用于短语中:afterawhile“过了一会儿”;allthewhile“一直,始终”;ashort/littlewhileago“刚才”;onceinawhile“偶尔、间

或”;wait/rest(for)awhile“等/休息一会儿”。

I haven’t seen her for along while.

我好久没有看见她了。

He usually goes to work by bike,but once in a while he goes by bus. 他通常骑自行车上班,但偶尔也乘公共汽车。

将一些重点词语的用法总结清楚,不管是做单项选择,还是阅读理解,都会有很大帮助。英语学习只要注重积累,善于总结,就会有所提高。

本期嘉宾:山西省实验中学高级教师 赵立宏 王莉霞

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