一、 while 作为专有名词时,意为“一段时间,一会儿”.比如：

I stayed there for a short while.

（我还在那里呆了一小一会儿.）

The postman came a short while ago.

（快递员刚来过.）

二、 while 作为连词时,有下列几类含意：

1. 意为“当……情况下,和……另外”,正确引导時间状语从句.比如：

You can go swimming while I'm having lunch.

我吃午饭时你能去游泳。

While I was watching TV, the bell rang.

（我看电视剧时,铃响了.）

Meimei watched TV while she ate her supper.

（娜娜边吃晚餐边看电视剧.）

They were grinning and watching while one man laughed and poured beer over the head of another...

当一个男人哈哈大笑着把葡萄酒倒在另一个人头顶时，她们都是在乐滋滋地看见。

2.(表明某一件事是在另一件事产生全过程中的某一时间点产生的)当…的情况下，在…时

We must have been burgled while we were asleep.

大家入睡时一定让贼入屋偷了。

Her parents died while she was still at school.

她仍在念书时爸爸妈妈就过世。

While I was waiting at the bus stop, three buses went by in the opposite direction.

我还在公共汽车站候车时，对向驶来了三辆公交车

I sat on the settee to unwrap the package while he stood by

我坐着排椅上开启包囊时他就立在边上。

3. 意为“尽管,虽然”,一般放句首，正确引导妥协状语从句.比如：

While I am willing to help, I do not have much time available.

虽然我愿帮助，可是沒有是多少時间。

While the modelling business is by no means easy to get into, the good model,male or female, will always be in demand

虽然女学妹领域决不是那麼非常容易进到的，可是好的女学妹，无论男孩和女孩，一直必须的。

While it was late, he went on working.

（尽管很晚了,但他依然还在再次工作中.）

While he is in poor health, he works hard.

（尽管他身体不好,但他還是认真工作.）

4. 联接2个并排语句,表明“比照”关联.比如：

I looked a bit stiff while they were so lively.

她们都那般开朗，看起来我太板了

While Tom's very good at science, his brother is absolutely hopeless.

汤母很善于理工科，而他的弟兄肯定是无可救药。

Marianne was tempted to turn the large rooms into traditional French-style salons, while Howard was in favour of a typically English look...

玛丽安娜想把这种大屋子搞成传统式法式风格大客厅的模样，可是詹姆斯喜爱典型性的英式风格。

He went out for a walk, while I stayed at home.

（他出来散散步了,可是我却呆在家里.）

I like singing while she likes dancing.

（我喜欢唱歌,而她喜爱舞蹈.）

You like sports, while I prefer music.

（你喜爱体育文化,可是我更喜欢音乐.）

5. 到…时；直至…已经 （until）

I waited while six o'clock.

我一直直到了六点钟。

三、 while 正确引导状语从句时,应留意以下几个方面：

1. while 正确引导的時间状语从句既可放到句首,也可放到句末；而 while 正确引导的妥协状语从句一般放到句首,不放到句末.此外,还可以从实际意义上多方面区别.比如：

While the news, so far, has been good, there may be days ahead when it is bad.

虽然到现在已经还全是喜讯，可是很有可能过不上几日便会有噩耗传出

While he was tired, he went on working.

（尽管他太累了,但他還是再次工作中.）

（ while 正确引导妥协状语从句）

While he was tired, he would have a rest.

（他太累了就歇息一会儿.）

（ while 正确引导時间状语从句）

2. while 正确引导妥协状语从句时,假如从句的主语和主句的主语同样,那麼从句的主语和谓语动词 be 都能够省去.比如：

While he was ill, he went there. （=While ill, he went there.）

（尽管他有病,但他還是去那了.）

3. while 和 when 都能够正确引导時间状语从句,但应留意： while 正确引导的時间状语从句中的谓语动词务必是持续性的形容词或表明情况的形容词；而 when 正确引导的時间状语从句中的谓语动词既能够是延续性动词,还可以是是非非延续性动词.当時间状语从句中的谓语动词是延续性动词时, while 和 when 能够相互之间更换.比如：

While we were talking, the teacher came in.

（大家已经交谈时,教师进来了.）

The bus had left when we arrived at the bus stop.

（在我们抵达地铁站时,公交车早已提走了.）

（ arrive 是是非非延续性动词,因而,此句中的 when 不能用 while 更换.）

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

（大家已经汇报工作时,教师离开了进去.）

（ have 是延续性动词,因而,句中的 when 可以用 while 更换.）

while正确引导的時间状语从句要用开展语态,而when正确引导的時间状语从句要用一般语态. 比如：While they were talking ,the bell rang.已经她们交谈的情况下,上课铃响了.

I was doing my homework when my mother came back home yesterday evening.昨晚母亲回家了的情况下,我正在做家中作

4. while 正确引导的状语从句还能够表明“某一姿势已经开展的另外,另一个姿势也在开展当中”.比如：

While the teacher was speaking, the students were listening.

（老师上课时,学员们在听.）

While he was writing, I was reading

I filled the kettle while she was talking and plugged it in

她讲话间，我将茶壶注满并插到了开关电源。

关键习惯用法：

while you're/I'm etc. at it

趁做某件事的情况下；顺带；顺便

I'm just going to buy some postcards.’ ‘Can you get me some stamps while you're at it?’

“我正想要去买名信片。”“你可以顺带帮我买一些纪念邮票吗？”

四、分析when as while 【导航栏词意：当…时】

when conj. 在…时，当…时

〔分析〕

所正确引导的状语从句中，宾语能够是延续性动词，还可以是瞬时速度形容词，其姿势既能够和主句的姿势另外产生，还可以在主句的姿势以前或以后产生。

〔例子〕

He got engaged to Lucy when travelling last autumn.

上年秋季旅游时，他与露西订了婚。

It was raining when we arrived.

大家到的情况下已经雨天。

Turn off the switch when anything goes wrong with the device.

假如设备出常见故障，就把电源开关关闭。

as conj. 当…时，（正当性）…的情况下

〔分析〕

正确引导状语从句时，偏重于指从句中的姿势与主句中的姿势另外产生或另外开展，一般延迟时间不长，其宾语能够是延续性动词，还可以是瞬时速度形容词。

〔例子〕

She was coming in as he was going out.

她进去的情况下，他就要出来。

I caught a whiff of perfume as she swept past me.

她从我身旁踏过时，我嗅到一股香味。

Joe jumped onto the bus just as it was pulling away.

正当性公交车启动时，乔跳到了车。

while conj. 当…时，在…期内

〔分析〕

指在某件事产生之时或产生的全过程中，另一事又产生。所正确引导的状语从句中，宾语应是延续性动词，而无需瞬时速度形容词，注重其姿势与主句中的姿势另外产生，但延迟时间一般较长；有时候也可指主句的姿势在从句的姿势全过程中产生。

〔例子〕

Don't interrupt him while he is thinking.

他在思索那时候就别去打扰他。

She got married while working as a waitress.

她在餐馆当服务员期内结了婚。

Pat killed time by watching TV while waiting for her.

帕特在等她时边看电视剧边消磨时光。