1、“当……时候”，引导时间状语从句(jù)(从句动(dòng)作(zuò)必须是延(yán)续(xù)性的)。

　　Please don't talk so loud while others are working.

　　While I was cleaning the window，my finger was seriously cut。

　　2、“虽然，尽管”相当于although，引导让步状(zhuàng)语从句(常(cháng)把while放(fàng)在句(jù)首四川的拼音怎么拼写的，四川拼音怎么拼写读音的)。

　　While she is a top student， she has some shortcomings. While the Internet is bridging the distance between people， it may also be breaking some home or will cause other family problems。

　　3、“只(zhǐ)要(yào)，如果”等于as long as，引导条件状语(yǔ)从(cóng)句。

　　There is hope while there is life. While you study hard， your effort will pay off。

while的前后时态(tài)口诀

　　while的瞎棚前后(hòu)时态口(kǒu)蚂世诀(jué)：当(dāng)while表(biǎo)示同时的时候，主句(jù)和从句的时态(tài)是(shì)一致的，既可以都是一般现在时，又可以都是一般过去时。

　　可以表示过去同时发生或者现在正(zhèng)在同(tóng)时(shí)发生某事。

　　1、“当……时(shí)候”，引导(dǎo)时间(jiān)状语从句(从句动作必(bì)须是延续性的)。

　　Please dont talk so loud while others are working.

　　While I was cleaning the window，my finger was seriously cut。

　　2、“虽然，尽(jǐn)管”相当(dāng)于although，引导让步状语从(cóng)句(常把while放在句首磨物(wù)则)。

　　While she is a top student， she has some shortcomings. While the Internet is bridging the distance between people， it may also be breaking some home or will cause other family problems。

　　3、“只要，如果(guǒ)”等于as long as，引(yǐn)导条件状(zhuàng)语(yǔ)从句。

　　There is hope while there is life. While you study hard， your effort will pay off。

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