as,when和while的区别
1. As/When/While:A was happening, B happened或B happened as/when/while A was happening.
as,when,while用来表示“当某事发生的时候,一个长的行为或事件正在进行”。
当从句引导的句子表示持续性动作时,as/when/while引导的从句一般用过去进行时(was/were+动词ing)。例如:
As I was walking down the street I saw Joe driving a Porsche.当我正在沿着街道走的时候,我看到乔正开着保时捷。
The telephone rang when i was having a bath 当我正在洗澡的时候,电话铃响了。
as,when,while都可以用现在时态,如:
Please don't interrupt me when I'm speaking.当我说话的时候,请不要打断
I often get good ideas while I'm shaving.当我刮胡子的时候,我经常能想到好点子。
2. while A was happening,B was happening或While A happened, B happened
while用来表示两个长动作或事件过去同时发生,用过去进行时或者过去时态。如:
While you were reading the paper ,I was working.当你在读报纸的时候,我正在工作。
John cooked supper while I watched TV.当约翰在煮晚饭的时候,我在看电视。
也可以用现在时态,如:
After supper,I wash up while Mary puts the children to bed.晚饭后,当玛丽弄孩子们睡觉的时候我在洗漱。
3. As A happened,B happened.
B happened,as A happened.
as,when和while的区别
as 用在两个短的行为或事件同时发生,如:
As I opened my eyes I heard a strange voice.当我睁开眼睛的时候,我听到奇怪的声音。
The doorbell rang just as i picked up the phone.当我拿起电话的时候,门铃响了。