While的用法大全详解高考完形高频核心词全方位解析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 havent 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 cant 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 dont 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。 5.意为同时;也。如: While the book is welcomed by scholars, 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2