while的用法.doc

while的用法97542===========================================================作者:hnlzpsh128(http://hnlzpsh128.)发表于::35分类:勉強出处:http://hnlzpsh128./post/18675/445922---------------------------------------------------------------While用法小结一、while作名词用,表示“一会儿”“一段时间” likes to lie down for a while after 。ing to another country to study requires a big adjustment and it takes a while to fit ,需要花一段时间来适应。二、While作连词(1) must strike while the iron is 。 she was listening to the radio,she fell 。(2)引起让步状语从句,意思是“虽然…但是….”、“尽管…但是…”(多放于句首) he loves his students,he is very strict with them..虽然他爱他的学生,可是他对他们很严格。 these experiments are interesting and useful,it is important to remember that they may not always tell us much.(BookIIIp125)虽然这些实验很有趣也有用,但是很重要的是要记住,这些实验也可能不会告诉你很多。(3)引起条件状语,意思是“只要” there is life there is ,就有希望。 there is a way there is 。三、While作并列连词用,意思为“而,然而”,表对比。而but表转折。 people waste food while others haven't ,然而有些人却吃不饱。 son was having a good meal at home,while the parents were working in the 。 ought to have helped her,but I never 。 is sweet,but the bee ,但蜜蜂有刺蜇人。,when,as的用法区别都译为“当…的时候”,区别为:when后的从句谓语动词既可是延续性动词,也可是短暂性动词,而且还可作并列连词,译为“这时”。但以下句型一定用when,作并列连词:句型A:be about