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while的前后时态口(kǒu)诀，while的前后时态要一致吗

　　可以表示(shì)过(guò)去同时发生或者现(1ma等于多少a，1ua等于多少axiàn)在正在(zài)同时发生某(mǒu)事。

　　1、“当……时候”，引导时间状语(yǔ)从(cóng)句(从句动(dòng)作必须是延续性的)。

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

1ma等于多少a，1ua等于多少a　　While I was cleaning the window，my finger was seriously cut。

　　2、“虽然，尽管(guǎn)”相当于although，引导让步状语(yǔ)从句(常把while放(fàng)在句首)。

　　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、“只要，如果(guǒ)”等于as long as，引导条件(jiàn)状(zhuàng)语从句。

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

while的前后(hòu)时态(tài)口诀

　　while的瞎棚前后时态口蚂世(shì)诀：当(dāng)while表示同时的时候，主句和从句的时态是(shì)一(yī)致的，既可以都是一般(bān)现在时，又可以都是一(yī)般过去(qù)时。

　　可(kě)以表(biǎo)示过(guò)去同(tóng)时发生或者现在(zài)正(zhèng)在同时发(fā)生某事。

　　1、“当……时候(hòu)”，引(yǐn)导时间状语从句(从(cóng)句(jù)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”相当于although，引导让步状语(yǔ)从(cóng)句(常把while放在句首磨物则)。

　　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，如(rú)果”等于as long as，引(yǐn)导(dǎo)条件(jiàn)状语从句。

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

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