英语中 while 的用法

一、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，如：

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。

while、when 和 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。

二、引导让步状语从句，多用于句首。意为“尽管，虽然”。例如：

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。

三、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。例如：

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。

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。

四、引导条件状语，意思是“只要”。例如：

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。

五、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。例如：

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。

六、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：

after a while 过了一会儿

I turned back after a while, but he kept walking.

我过了一会就往回走了，但他还接着走。

After a while I led the conversation around to her job.

过了一阵子，我把话题引到她的工作上。

all the while 一直，始终

All the while the people at the next table watched me eat.

我吃东西的时候邻桌的人一直在看我。

It's been constantly on my mind all the while.

我心里直嘀咕这件事。

a short/little while ago 刚才

He went back for his coat a short while ago.

刚才他回去拿他的上衣了。

A short while ago, I attended the unveiling of the statue of Confucius.

刚才，我参加了孔子铜像的揭幕典礼。

once in a while 偶尔、间或

He comes to our room for a chat every once in a while.

他偶尔来我们房中闲谈。

Once in a while she phoned him.

她间或会给他打个电话。

wait/rest(for)a while 等/休息一会儿

We are rather busy at the moment. I'm afraid you will have to wait for a while.

现在客人已经满了，恐怕您要等一会儿了。

I'd strongly recommend that you wait for a while before going swimming.

我强烈建议你先等一下再去游泳。