中考复习英语人教版 时间状语从句中when和while的区别 课件

这是一份中考复习英语人教版 时间状语从句中when和while的区别 课件，共13页。PPT课件主要包含了时间段时间点，时间点，时间段，非延续性动词，延续性动词等内容，欢迎下载使用。
when和while有什么区别呢？
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延续性动词，也叫作持续性动词，表示能够延续的动作，这种动作发生后可以一直持续下去。
非延续性动词，也叫作终止性动词、瞬间性或短暂性动词，表示不能延续的动作，即动作从发生到结束所持续的时间非常短，且大多都是动作发生后也就马上结束。
I learned English three years ag.
She gets t schl by bus every mrning.
learn, wrk, stand, study, knw, walk, keep, have, sing, read等
pen, die, finish, begin, cme, leave, mve, g ,buy等
She brrwed this bk frm the library.
都表示“当……”，但区别是什么？
when和while引导时间状语从句
It was raining when she arrived at the statin.
When yu wrked, I was sleeping.
延续性动词/非延续性动词
从句中动作既可以与主句的动作同时发生，又可以在主句动作之前或之后发生。
I was ding hmewrk while my father was watching TV.
Dn’t make any nise while thers are reading.
当我做作业的时候父亲正在看电视。
不要制造噪音当别人看书时。
用when或while填空1. _______ we were talking in the classrm, the teacher came in.2. _______ they gt t the airprt, it was raining.3. _______ she was reading a bk, the phne rang.4. _______ I saw the by, he was wearing a new cat. 5.Were yu drawing the teacher was talking?
当从句中的动作为时间段，且从句动作为延续性动词时，when和while都可以使用
When引导的时间状语从句，从句中的动词可以是延续性动词也可以是非延续性动词。但是while从句中的动词必须是延续性动词。且while常强调两个动作同时发生，用进行时。
When I was taking a walk in the park, I met him.when 和 while 可以互换
It was raining heavily when we arrived.
只能用when,不能用while