while的(de)前(qián)后时态口诀，while的前后时(shí)态要一致吗

　　可以表示(shì)过去(qù)同时(shí)发生或者现在正在(zài)同时发生某事。

　　1、“当……时候”，引导(dǎo)时间状语从句(从句动(dòng)作必须(xū)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(suī)然，尽管”相当于(yú)although，引导让步状语从句(常把while放在(zài)句(jù)首(shǒu))。

　　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(yào)，如果”等于as long as，引导条件状(zhuàng)语(yǔ)从句。

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

while的前后时(shí)态口(kǒu)诀

　　while的瞎棚前后时态(tài)口蚂世诀：当while表示同时的时候(hòu)，主句和从句的时态是(shì)一致的，既可以(yǐ)都是(shì)一般(bān)现在时，又可以都是一(yī)般(bān)过去时。

　　可以表示过去同时发生或者现在正在同时发(fā)生某事。

　　1、“当(dāng)……时候”，引导时间状语(yǔ)从句(jù)(从句(jù)动(dòng)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(rán)，尽(jǐn)管”相(xiāng)当于although，引导让步状语从句(常把while放在句首磨物则(zé))。

　　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”等于as long as，引导(dǎo)条件状语从句。

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

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