while用法小结共4页.doc

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1、如有侵权，请联系网站删除，仅供学习与交流while用法小结【精品文档】第 4 页while用法小结 (1)引导时间状语从句,从句中的谓语动词应用延续性动词或表示状态的词。eg.While the discussion was still going on,George came in.当讨论还在进行时,乔治走了进来。Strike while the iron is hot.趁热打铁。注意:while,when,as表“当的时候”的区别while强调同时性或某时间段内一种情况发生时另一种情况出现,与延续性动词连用;when可与延续或非延续性动词连用,在强调“当时”,“这时”之意时when;as强

2、调同时性,指“一边一边”一件事情发生,另一件事情立刻发生。eg.Im going to the post office. _youre there,can you get me some stamps? A.As B.While C.Because D.If解析:从该题的题意可以看出C、D两选项不合题意；而as侧重同时性,不合题意;while可指一时间段发生某情况时,另一情况出现,正合题意。(2)引导让步状语从句,多用于句首。意为“尽管,虽然”。eg.While I admit his good points ,I can see his bad.尽管我承认他的长处,但我也看到了他的不足。Wh

3、ile 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。(3)While作并列连词用,意思为“而,然而”,表前后意义上的对比或转折。eg.Theres plenty of rain in the southeast,while theres little in the northeast.东南部雨量充足,而西北部则很少下雨。Some people waste food while others havent enough.有些人浪费粮食,然而有些人却吃不饱。egShe thought I was talk

4、ing about her daughter,_,in fact,I was talking about my daughter.A.whom B.where C.which D.while解析:句意为“她认为我在谈她女儿,而实际上我在谈我的女儿。”whom,which和where分别是引导定语从句的关系代词和关系副词,后一句并非修饰定语从句,故应排除A、B和C选项。注意:while与but的区别二者都有“而,然而”之意,但while强调二者的对比,而but强调前后的转折关系。(4)引导条件状语,意思是“只要”eg.While there is a will,there is a way.有志

5、者事竟成。We can surely overcome these difficulties while we are closely united.只要我们紧密地团结一致,一定能克服这些困难。(5)while从句中的省略。当while从句中的主语与主句的主语一致,且含有be的某种形式时,从句中的主语连同be可同时省略。eg.While listening to the radio,she fell asleep.她在听收音机时睡着了。While in London,he studied music and painting.在伦敦时,他学习音乐和绘画。(6)while可用作名词,意为“一会儿

6、;一段时间” 作名词用时,主要用于短语中:after a while“过了一会儿”;all the while“一直,始终”;a short/little while ago“刚才”;once in a while“偶尔、间或”;wait/rest(for)a while“等/休息一会儿”。I havent seen her for a long while.我好久没有看见她了。He usually goes to work by bike,but once in a while he goes by bus.他通常骑自行车上班,但偶尔也乘公共汽车。学习感悟：将一些重点词语的用法总结清楚,不管是做单项选择,还是阅读理解,都会有很大帮助。英语学习只要注重积累,善于总结,就会有所提高。