while的用法
while的用法 while 一段时间；当……时（和……同时）；却（1）I”ll be back for a while
（2）He fell asleep while doing homework.
（3）John was dressed in brown while Mary was dressed in blue
连词while大致有以下四种用法:
1.引导时间状语从句,意为"当……的时候;和……同时",此时的主从句谓语动作同时发生,从句谓语通常是延续性动词。如:
Mary watched TV while she ate her supper.玛丽边吃饭边看电视。
While she was listening to the radio, she fell asleep.她听着收音机睡着了。
while引导从句时,如主从句的主语一致,且从句谓语又含有be,则从句主语和be可省略。while后可直接跟现在分词、名词、形容词或介词短语。如:
We are teachers while (we are) serving as students.我们边当老师边当学生。
While (he was) yet a youth, he gained many prizes.他年轻时就曾多次获奖。
He caught a cold while(he was) on vacation.他度假时患了感冒。
2.表示对比或转折,意为"而;然而"。此时,while一般位于句中。如:
Some people waste food while others haven't enough.有些人浪费粮食,然而有些人却吃不饱。
You like sports, while I prefer music.你喜欢体育,而我更喜欢音乐。
3.表示让步,通常位于句首,意为"尽管;虽然"。如:
While I agree with your reasons, I can't allow it.尽管我同意你的理由,但我不能允许这样做。
While he loves his students, he is very strict with them.虽然他爱他的学生,可是他对学生们很严格。
While (he was) respected, he is not liked.他虽受人尊敬,但并不被人喜欢。
4.表示条件,意为"只要",其意思和用法相当于as long as。while可位于句首,也可位于句中。如:
You don't have to worry while we are here.只要我们在,你就别着急。
There will be life while there is water and air.只要有空气和水,就有生命。
While there is life, there is hope.留得生命在,不怕没希望。
5.意为"同时;也"。如:
While the book is welcomed by schol-
ars, it will make an immediate appeal to the general readers.这本书受到学者的欢迎,同时也会引起一般读者的兴趣。
6.意为"趁着"。如:
Make hay while the sun shines.晒草要趁阳光好。(谚)
Strike while the iron is hot.趁热打铁。(谚)
While the roses are yet in bloom, will you come with me to see them?趁着玫瑰花还开着,你和我一道去看看好吗
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绛旓細while 涔熶袱绉嶈瘝鎬с傝繛璇嶏細鏈変笁绉鐢ㄦ硶 寮曞鏃堕棿鐘惰浠庡彞銆傚 They were grinning and watching while one man laughed and poured beer over the head of another. 褰撲竴涓敺瀛愬ぇ绗戠潃鎶婂暏閰掑掑湪鍙︿竴涓汉澶翠笂鐨勬椂鍊欐椂锛屼粬浠兘鍦ㄤ箰鍛靛懙鍦扮湅鐫銆傚紩瀵艰姝ョ姸璇粠鍙ャ傚 While the numbers ...
