高中英语教学中,when和while应当怎么讲解

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高中英语教学中,when和while应当怎么讲解
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高中英语教学中,when和while应当怎么讲解
高中英语教学中,when和while应当怎么讲解

高中英语教学中,when和while应当怎么讲解
不需长篇大论.合并下列句子,如果你会,你在这方面的问题就解决了:
He was getting off the bus.He fell and hurt himself
1 While he was getting off the bus,he fell and hurt himself
2 When he fell and hurt himself,he was getting off the bus
3 He was getting off the bus when he fell and hurt himself
4 He fell and hurt himself while he was getting off the bus.
5 As he got off the bus,he fell and hurt himself
6 He fell and hurt himself as he got off the bus.

while用作长时间段 when是时间点 时间点
而且 while链接两个相等的部分 比如 my mother is singing while i am reading.

when和while的用法与区别
(一)、when,while都有“当……时候”的意思。
  when既可表示某一点时间,也可以表示某一段时间 。
  在when引导的时间状语从句中,其谓语动词可以是延续性的,也可以是非延续性的,可与主句中的谓语动词同时发生,也可在其后发生。
  例如:
  1、I was just reading a book when ...

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when和while的用法与区别
(一)、when,while都有“当……时候”的意思。
  when既可表示某一点时间,也可以表示某一段时间 。
  在when引导的时间状语从句中,其谓语动词可以是延续性的,也可以是非延续性的,可与主句中的谓语动词同时发生,也可在其后发生。
  例如:
  1、I was just reading a book when she came into my room.
  她走进我房间时,我正在看书。
  2、Were you writing when the teacher came in?
  老师进来的时候,你在写信吗?
  3、When he was a child he was always trying out new ideas.
  他小时候就常常试验一些新的设想。
  (二)、while只能表示某一段时间,不能表示某一点时间。在while引导的时间状语从句中,其谓语动词只能是延续性的,而且也只能与主句中的谓语动词同时发生或存在。
  例如:
  1、While Jim was mending his bike, Lin Tao came to see him.
  正当吉姆修自行车时,林涛来看他。
  2、You can’t do your homework while you’re watching TV.
  你不能一边看电视一边做家庭作业。
  (三)、另外,when和while的区别还在于:while引导的时间状语从句多用进行时态,而when引导的时间状语从句多用一般时态。
  例如:
  1、While they were talking , the bell rang.
  正在他们谈话的时候,上课铃响了。
  2、I was doing my homework when my mother came back home yesterday evening.
  昨天晚上妈妈回家的时候,我正在做家庭作
  注意:
  1) 如主句谓语动词表示的是短暂动作,从句时间状语指一段时间,when while as 三者可通用。
  例如:
  Peter came in while /as I was watching TV.当Peter进来的时候我正在看电视。
  I was watching TV when Peter came in. 当Peter进来时我正在看电视。
  2) as 和 when 可与非延续性动词连用,而 while 只能与延续性动词连用。
  例如:He came in when/ as I was going to bed.我正要上床睡觉,他进来了。
  3) as 和 while可用来指一段时间,但 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是在 while 从句的动作延续中发生。
  例如:
  As my mother sang those old songs, tears ran down her cheeks.
  当我妈妈唱起那些老歌时,眼泪顺着她的脸颊流了下来。
  I came in while he was reading an interesting book in his room.

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