英语中while、when 怎么区分，有什么不同啊 在英语从句当中，到底while和when怎么区分着用，
\u82f1\u8bed\u4e2dwhile\uff0cwhen \u600e\u4e48\u533a\u5206\uff0c\u6709\u4ec0\u4e48\u4e0d\u540c\u4e00\u3002\u5f15\u5bfc\u65f6\u95f4\u72b6\u8bed\u4ece\u53e5\u65f6\uff0cWHILE\u8fde\u63a5\u7684\u662f\u65f6\u95f4\u6bb5\uff0c\u800cWHEN\u8fde\u63a5\u7684\u591a\u662f\u65f6\u95f4\u70b9
\u4f8b\u5982What does your father do while your mother is cooking?
What does your mother do when you come back?
\u4e8c\uff0cWHILE\u53ef\u4ee5\u8fde\u63a5\u4e24\u4e2a\u5e76\u5217\u7684\u53e5\u5b50\uff0c\u800cWHEN\u4e0d\u53ef\u4ee5
\u4f8b\u5982I was trying my best to finish my work while my sister was whtching TV
\u4e09\uff0cWHEN\u662f\u7279\u6b8a\u7591\u95ee\u8bcd\uff0c\u5bf9\u65f6\u95f4\u8fdb\u884c\u63d0\u95ee\uff0cWHILE\u4e0d\u662f\u3002
\u4f8b\u5982\uff0cWhen were you bron?
\u5f53\u4e3b\u4ece\u53e5\u4e4b\u95f4\u8868\u793a\u8f6c\u6298\u6216\u5bf9\u6bd4\u5173\u7cfb\u65f6\uff0c\u591a\u7528while,\u610f\u4e3a\uff1a\u201c\u7136\u800c\uff0c\u800c\u201d \u4e0d\u7528when\u3002\u5982\uff1a
She thought I was talking about her daughter, while in fact, I was talking about my daughter.\u5979\u4ee5\u4e3a\u6211\u5728\u8c08\u8bba\u5979\u5973\u513f\uff0c\u800c\u4e8b\u5b9e\u4e0a\uff0c\u6211\u5728\u8c08\u8bba\u6211\u7684\u5973\u513f\u3002
when\u8868\u793a\u201cat that moment\u201d\u7684\u610f\u601d\uff08= and then\uff09\uff0c\u5f15\u8d77\u7684\u53e5\u5b50\u4e0d\u80fd\u653e\u5728\u53e5\u9996\uff0c\u4e0d\u80fd\u7528 while\u6765\u66ff\u6362\u3002\u4f8b\u5982\uff1a
We were watching TV when suddenly the lights went out.\u6211\u4eec\u6b63\u5728\u770b\u7535\u89c6\uff0c\u7a81\u7136\u706f\u706d\u4e86\u3002
when\u5f15\u5bfc\u7684\u4ece\u53e5\u65e2\u53ef\u8868\u793a\u4e00\u70b9\u65f6\u95f4\uff0c\u4e5f\u53ef\u8868\u793a\u4e00\u6bb5\u65f6\u95f4\uff0c\u4e5f\u5c31\u662f\u4ece\u53e5\u4e2d\u7684\u8c13\u8bed\u52a8\u8bcd\u65e2\u53ef\u4ee5\u662f\u6301\u7eed\u6027\u52a8\u8bcd\uff0c\u4e5f\u53ef\u4ee5\u4e3a\u77ed\u6682\u6027\u52a8\u8bcd\u3002while\u5f15\u5bfc\u7684\u4ece\u53e5\u901a\u5e38\u8868\u793a\u4e00\u6bb5\u65f6\u95f4\uff0c\u4ece\u53e5\u4e2d\u5b9c\u7528\u6301\u7eed\u6027\u52a8\u8bcd\u4f5c\u8c13\u8bed\u3002\u5f53\u4ece\u53e5\u4e2d\u7684\u8c13\u8bed\u52a8\u8bcd\u4e3a\u6301\u7eed\u6027\u52a8\u8bcd\u65f6\uff0c\u8fd9\u4e24\u8005\u53ef\u4ee5\u901a\u7528\u3002\u5982\uff1a
Mom was worried because her daughter was ill when / while Dad was away .\u5988\u5988\u62c5\u5fc3\uff0c\u56e0\u4e3a\u5973\u513f\u75c5\u4e86\uff0c\u7279\u522b\u662f\u5f53\u7236\u4eb2\u4e0d\u5728\u8eab\u8fb9\u7684\u65f6\u5019\u3002
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。
A:
这两个词都可用作从属连词,表示时间,意思都是"当(在)......的时候",但两者之间有区别: when 的含义是at or during the time that,既可用于一点时间(从句的谓语动词需用终止性动词),也可用于一段时间(从句的动词用延续性动词),从句与主句里面的谓语动词所表示的动作或状态能同时发生或一先一后分别发生。
例如： He wants to help people when they are ill.他想在人们生病时帮助他们。
When he got to Shanghai,the ship had already set off.他到达上海时，轮船已经开走了。
while 的含义是during the time that,只能用于指一段时间(从句的谓语动词必须是延续性的),从句与主句里面的谓语动词所表示的动作只能同时发生,不能一前一后发生。
例如: One day while they were working in the fields,some farmers sawsomething strange in the sky.有一天,一些农民在田间劳动的时候,看见空中有些奇怪的东西。
While I was reading,my mother was washing clothes.我读书时，我妈妈在洗衣服。
这两个词还可以用作并列连词。when 是"在那时"或"这时突然"(and just atthat time)的意思,用来连接两个并列分句,有时 when分句前有逗号把前后两个分句分开。
例如: An Arab was walking alone through the desert when he met two men.有个阿拉伯人正独自在沙漠里行走,这时他碰见了两个人。 I stayed till sunset,when it began to rain.我一直呆到太阳下山,天开始下雨了。
while 意为"而","却",,表示对照关系。例如： Instead,he asked his father why he was not able to hatch chickenswhile hens could.他反而问他父亲,为什么他不能孵出小鸡,而母鸡却能。
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