while的四个用法
while的四个用法：while可引导时间状语从句，意为当……时候；while可引导让步状语从句，意为虽然、尽管；while可引导条件状语从句，意为只要；while可引导原因状语从句，意为既然。
while的基本释义及用法介绍
while作为连词时，意思有在…期间;当…的时候;与…同时;(对比两件事物)…而，…然而。
1、当意为当……时候、和……同时时，引导时间状语从句。
例句：While I was watching TV, the bell rang.
我看电视时，铃响了。
Meimei watched TV while she ate her supper.
梅梅边吃晚饭边看电视。
We must have been burgled while we were asleep.
我们睡着时一定让贼入室偷了。
You can go swimming while I'm having lunch.
我吃午饭时你可以去游泳。
2、当意为虽然、尽管时，引导让步状语从句。
例句：While it was late, he went on working.
虽然很晚了，但他还在继续工作。
While he is in poor health, he works hard.
虽然他身体不好，但他还是努力工作。
While I am willing to help, I do not have much time available.
尽管我愿意帮忙，但是没有多少时间。
3、当意为只要时，引导条件状语从句，当于as long as。
例句：While there is life, there is hope.
有生命，就有希望。
While a spark of life remains, it is a doctor's duty to save the patient.
只要病人还有一息生机，医生就有责任挽救。
4、当意为既然时，引导原因状语从句，相当于since。
例句：You'll never save any money while you're so extravagant.
你这幺奢侈，永远存不下钱来。
I'd like to get it settled today while we're at it.
既然我们着手干了，我想今天就把它干完。
最后总结，通过以上关于while的四个用法内容介绍后，相信大家会对while的四个用法有个新的了解,更希望可以对你有所帮助。
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