2019高考英语状语从句when，as，while的区别素材.docx

when,as,while的区别when,as,while的区别1.He fell asleep when while, as he was reading.他看书时睡着了。2.While youre there, can you get me some stamps?3.I kept silent while he was writing.在他写的时候，我默不作声。4.She sang as she went along.她边走边唱。5.It was raining hard when as we arrived.我们到达时正下着大雨。6.I thought of it just when as you opened your mouth.就在你要说的时候，我也想到了。7.Things are getting better and better as time goes on.随着时间的推移，情况越来越好。8.As it grew darker, it became colder.天色越晚，天气越冷。9.He smiles when you praise him.你夸奖他时他总是笑笑。10.I will go home when he comes back.他回来时，我就回家去。11.We were about to start when it began to rain.我们正要出发，这时天开始下雨了。12.He likes coffee, while she likes tea.他喜欢咖啡，而她却喜欢茶。13.As When a boy, he lived in Japan.他小时候在日本。14.When While in trouble, ask her for help.遇到麻烦的时候你就去找她帮忙。【归纳】1.若主句表示的是一个短暂性动作，从句表示的是一个持续性动作，三者都可用：2.as用于引出一个持续性动词表示“在期间”时，其谓语通常只能是那些含有动作(action)和发展(development)意味的动词，一般不能是那些不用于进行时态的动词(如be, seem, love, want, agree, see, know, have等)，所以句中的while不能换为as.3.若主、从句表示两个同时进行的持续性动作，且强调主句表示的动作延续到从句所指的整个时间，通常要用while：4.若主从句表示的两个同时进行的动作含有“一边一边”之意思，通常用as：5.若从句是一个短暂性动作，主句是一个持续性动作，可用as / when但不用while：6.若主从句表示的是两个同时(或几乎同时)发生的短暂性动作，用as / when：7.(7.8句)若要表示两个正在发展变化的情况，相当于汉语的“随着”，一般用as：8.表示“每当的时候”(暗示一种规律性)，一般要用when：9.若主从句所表示的动作不是同时发生，而是有先后顺序时，一般要用when：10.(11.12句)when可用作并列连词，表示“这时(突然)”；while也可以用作并列连词，表示“而”、“却”(表示对比)；但as则没有类似用法：11.as和when后均可直接跟一个名词，构成省略句，但while一般不这样用：13.when和while后可接现在分词、介词短语、形容词等构成省略句，但as一般不这样用：when, as, while的区别相同点：表示主句的动作发生在从句的较长动作过程中，when,while ,as均可使用。从句中为be动词时，多用when和while。谈论两个同时进行的长动作可用while；谈论两个平行动作或两中状态变化多用as。 as, when引导短暂性动作的动词。Just as / Just when/ When I stopped my car, a man came up to me.不同点：1、when可指时间点，又可指时间段，从句中可用延续行动词，也可用非延续行动词。当从句的动作发生于主句动作之前，只能用when引导这个从句，不可用as或while。When you have finished your work, you may have a rest.2、while总是指一个时间段，从句中必须用延续性动词。 3、as多用于平行结构。表示两个动作同时发生：1)、一个主语同时进行两个动作；Helookedbehindfromtimetotimeashewentforward.2)、一种状态随另一种状态的变化而变化。Aschildrengetolder,theybecomemoreandmoreinterestedinthethingsaroundthem.从句表示随时间推移连词只能用as，不用when或while。 As the day went on, the weather got worse.日子一天天过去，天气越变越坏。while /as / when如果主句表示的是短暂的动作，而从句表示的是一段时间，三者可通用。 I met her when / while / as I was walking along the river.as和when可与终止性动词连用，while只能与延续性动词连用。 I saw her as / when she was getting off the bus.as强调主句与从句表示的动作同时发生，while强调主句表示的动作延续于while所指的整个时间。试比较：She sang while she went along.她走路时不停地唱。She sang as she went along.她边走边唱。when仅指时间，无其他含义；as有“随着”之意；while有“然而”、“趁着”之意。【对比训练】1.I was walking along the river _ I heard a cry for help. A.while B.sinceC.when D.as2._I admit his good points I can see his bad ones. A.when B.asC.while D.before3.I had just started back for the house to change my clothes _ I heard the voices.A. as B.forC. while D. when4. I had not been reading for half an hour _ I heard steps outside. A. while B. asC. when D. since5. She stopped _ she might have succeeded next time. A. when B. asC. since D. unless【答案与简析】C