发布网友 发布时间:2022-04-22 06:59
共1个回答
热心网友 时间:2022-06-17 02:37
while 是当什么什么的时候,一般不知道他的用法就是不能辨别while when的区别,希望下面的解释的帮助到你
when 与while的区别
1. when指某个时间点,表示瞬间动作;while 指某个时间段,表示延续性动作。如:
When I got there, she was playing the violin. 我到那里时,她正在拉小提琴。
While I was playing the violin, he came to see me.我正在拉小提琴时,他来看我了。
英语中,延续性动作是由延续性动词发出的,瞬间性动作是由非延续性动词发出的。延续性动词和非延续性动词的区别:
延续性动词是指该动作可以延续一段时间,而不是瞬间结束,如work(工作)、study(学习)、eat(吃)、watch(观看);非延续性动词是指该动作极为短暂,瞬间便会结束,如start(开始)、begin(开始)、hit(撞)、see(看见)、knock(敲)、jump(跳)。
2. when表示偏偏在这时,强调双方动作互相冲突;while表示与此同时,双方动作互不相干。如:
When we were having a meeting, the children were shouting outside the window.我们正在开会,孩子们却在窗外大喊大叫。
While we were having a meeting, the children were watching TV in the next room. 我们开会时,孩子们在隔壁房间看电视。
3. when排斥一般时间概念,泛指某特定情况;while表示趁有条件时,强调抓紧时机。如:
When in Rome, do as the Romans do.
入乡随俗。
While in Rome, he visited some of his old friends. 他在罗马的时候,拜访了一些朋友。
4. 用于完成时,when表示“在……之后”,while表示“在……期间”。如:
When he had joined the army, he was sent to the front. 他服役后,被派往前线。
While he has been in the army, he has done lots of good deeds. 他服役期间,做了许多好事。