while的(de)前后时态口诀，while的前后时态(tài)要(yào)一(yī)致吗

　　可(kě)以表示过去同时发生(shēng)或者(zhě)现在正在同时发生某事。

　　1、“当(dāng)……时候”，引导(dǎo)时间状语(yǔ)从句(从句动(dòng)作必须(xū)是延续性(xìng)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(dāng)于although，引(yǐn)导让步状语从句(常(cháng)把while放在句(jù)首)。

　　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(dǎo)条件状语(yǔ)从句。

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

while的前(qián)后时态口诀

　　while的瞎棚前(qián)后时态口蚂世诀：当while表(biǎo)示同时(shí)的时候，主句和从句的时态是一致(zhì)的，既可(kě)以都(dōu)是一般现在时，又可以(yǐ)都是(shì)一般(bān)过去时。

　　可以表示过(guò)去同(tóng)时发(fā)生或者现在正在(zài)同时发生某事。

　　1、“当……时候”，引导时间状语从句(从句动作必须是延(yán)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，尽管”相(xiāng)当于although，引导让步状语(yǔ)从句(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(zhǐ)要(yào)，如(rú)果(guǒ)”等于as long as，引(yǐn)导条件状(zhuàng)语从句。

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

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