百度作业网when&while的所有考点
来源：学生作业帮 编辑：百度作业网作业帮 分类：英语作业 时间：2024/04/20 03:08:31
when&while有哪些考点 它们的区别是什么 何时用when？这时有什么特点？ 何时用while？这时有什么特点？ 我需要when&while的所有考点 谢谢老师 *^ο^*
解题思路： 如下
解题过程：
When和While的区别
①when是at or during the time that, 既指时间点，也可指一段时间，while是during the time that，只指一段时间，因此when引导的时间状语从句中的动词可以是终止性动词，也可以是延续性动词，而while从句中的动词必须是延续性动词。
②when 说明从句的动作和主句的动作可以是同时，也可以是先后发生；while 则强调主句的动作在从句动作的发生的过程中或主从句两个动作同时发生。
③由when引导的时间状语从句，主句用过去进行时，从句应用一般过去时；如果从句和主句的动作同时发生，两句都用过去进行时的时候，多用while引导，如：
a. When the teacher came in, we were talking.
当此句改变主从句的位置时，则为：
While we were talking, the teacher came in.
b. They were singing while we were dancing.
④when和while 还可作并列连词。when表示“在那时”；while表示“而，却”，表对照关系。如：
a. The children were running to move the bag of rice when they heard the sound of a motor bike.
孩子们正要跑过去搬开那袋米，这时他们听到了摩托车的声音。
b. He is strong while his brother is weak.
他长得很结实，而他弟弟却很瘦弱。
一、 when常见考点
1、“当……时候”， 引导时间状语从句。
When he was a young man， he was fond of hunting.
It was already 10:00PM，when I finished the work.
2、“正在那时，这时”等于and at that time，引导时间状语从句。
We were having a meeting when someone broke in.
We were about to leave when it began to rain.
二、 while常见考点
1、“当……时候”， 引导时间状语从句（从句动作必须是延续性的）。
Please don’t talk so loud while others are working.
While I was cleaning the window， my finger was seriously cut.
2、“而，然而”，表对比或相反的情况。
He likes pop music，while I am fond of folk music.
Kids talk frequently about what they can do，while many adults do the opposite， tending to talk about what they can’t .
最终答案：略
解题过程：
When和While的区别
①when是at or during the time that, 既指时间点，也可指一段时间，while是during the time that，只指一段时间，因此when引导的时间状语从句中的动词可以是终止性动词，也可以是延续性动词，而while从句中的动词必须是延续性动词。
②when 说明从句的动作和主句的动作可以是同时，也可以是先后发生；while 则强调主句的动作在从句动作的发生的过程中或主从句两个动作同时发生。
③由when引导的时间状语从句，主句用过去进行时，从句应用一般过去时；如果从句和主句的动作同时发生，两句都用过去进行时的时候，多用while引导，如：
a. When the teacher came in, we were talking.
当此句改变主从句的位置时，则为：
While we were talking, the teacher came in.
b. They were singing while we were dancing.
④when和while 还可作并列连词。when表示“在那时”；while表示“而，却”，表对照关系。如：
a. The children were running to move the bag of rice when they heard the sound of a motor bike.
孩子们正要跑过去搬开那袋米，这时他们听到了摩托车的声音。
b. He is strong while his brother is weak.
他长得很结实，而他弟弟却很瘦弱。
一、 when常见考点
1、“当……时候”， 引导时间状语从句。
When he was a young man， he was fond of hunting.
It was already 10:00PM，when I finished the work.
2、“正在那时，这时”等于and at that time，引导时间状语从句。
We were having a meeting when someone broke in.
We were about to leave when it began to rain.
二、 while常见考点
1、“当……时候”， 引导时间状语从句（从句动作必须是延续性的）。
Please don’t talk so loud while others are working.
While I was cleaning the window， my finger was seriously cut.
2、“而，然而”，表对比或相反的情况。
He likes pop music，while I am fond of folk music.
Kids talk frequently about what they can do，while many adults do the opposite， tending to talk about what they can’t .
最终答案：略