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

　　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(guǎn)”相当于although，引(yǐn)导让步状(zhuàng)语从句(常(cháng)把while放在(zài)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(zhǐ)要，如果”等于as long as，引导条件状语从(cóng)句。

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

while的前后时态口诀

　　while的瞎(xiā)棚前(qián)后时态口蚂世诀：当while表示同时的时候，主(zhǔ)句和从句的时(shí)态是一致的，既可以(yǐ)都(dōu)是一(yī)般现在时，又可以都是(shì)一般过去时(shí)。

　　可以表(biǎo)示过去同时发(fā)生或者(zhě)现(xiàn)在正在(zài)同时发生某事。

　　1、“当(dāng)……时候”，引(yǐn)导(dǎo)时(shí)间(jiān)状(zhuàng)语从句(从句动(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，尽管”相当于(yú)although，引导让步(bù)状语从句(常把while放在句首磨(mó)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(yào)，如果”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。

未经允许不得转载：绿茶通用站群 n是什么化学元素，n是什么化学元素符号