区别在过去进行时当中when和while的用法？
when 和while的用法区别如下：
1、when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。
2、when 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.
4、when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。
扩展资料：
when与what time的用法区分
what time常用来问钟点，而when除了问钟点外，还可用来问日期，月份，年份等。 [3]
有时两者可以换用，有的场合不可以。
1.问钟点时，可以换用。When do you go to school?What time do you go to school?
2.问日期，月份，年份等，只能用whenWhen were you born? I was born on July 2,1972.
3,当问某事在某天的什么具体时间进行，只能用what timeWhat time did you call this afternoon?I called at 4:00 this afternoon.
参考资料来源：百度百科-when
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一、时态不同
1、when所在的从句谓语动词一般采用一般过去时，主句谓语动词采用过去进行时或是一般过去时。
如：When he entered the room, she was playing the piano.
But when I returned the door was open.
需要注意的是，when也有可能表示“正在这时”。
如：I was walking in the park, when a little child bumped into me.
我正在公园里散步，这时一个小孩撞到了我怀里。
2、while所在的句子的谓语动词一般用过去进行时，而另外一个句子的谓语动词则采用过去进行时或一般过去时。
如：While the royal visitors were passing by, the crowd burst into cheers.
While she was reading in the study, he was watching TV in the living room.
二、动词状态不同
在when引导的时问状语从句中，，谓语动词可 以是终止性动一词，也可以是延续性动词; 而在while引导的时间状语从句中，谓语动词必须是延续性动词。
1、We were talking when the teacher came in.
我们正在交谈，这时，老师进来了。
2、They arrived when/while we were having dinner.
我们正吃晚饭时他们来了。
扩展资料
其他用法：
若要表示主句动作伴随从句动作同时发展变化，有类似汉语“随着”的意思，英语习惯上要用as，而不用when或while。
如：The room grew colder as the fire burnt down.
随着炉火逐渐减弱，房间越来越冷。
As time goes by my memory seems to get worse.
随着时间的流逝，我的记忆力似乎越来越差。
若不是引导从句，而是引出一个短语，则用with，不用as。
如：With winter coming on, it's time to buy warm clothes.
随着冬天到来，该买暖和衣裳了。
The shadows lengthened with the approach of sunset.
随着太阳下落，影子也逐渐伸长。
1、when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。
2、when 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.
4、when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。
扩展资料：
when与what time的用法区分
what time常用来问钟点，而when除了问钟点外，还可用来问日期，月份，年份等。 [3]
有时两者可以换用，有的场合不可以。
1.问钟点时，可以换用。When do you go to school?What time do you go to school?
2.问日期，月份，年份
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。
