when和while的区别 when和while的区别是什么？
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when\u548cwhile\u7684\u533a\u522b\u5982\u4e0b\uff1a
1\u3001\u4ece\u53e5\u4e2d\u7528\u6cd5\u533a\u522b\uff1a
while\u5f15\u5bfc\u7684\u4ece\u53e5\u53ea\u80fd\u7528\u5ef6\u7eed\u6027\u52a8\u8bcd\uff0c\u800cwhen\u5f15\u5bfc\u7684\u4ece\u53e5\u53ef\u4ee5\u7528\u5ef6\u7eed\u6027\u52a8\u8bcd\u4e5f\u53ef\u4ee5\u7528\u975e\u5ef6\u7eed\u6027\u52a8\u8bcd\u3002
2\u3001\u4ece\u53e5\u65f6\u6001\u7684\u533a\u522b\uff1a
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3\u3001\u5177\u4f53\u542b\u4e49\u7684\u533a\u522b\uff1a
when\u662f\u65e2\u6307\u65f6\u95f4\u70b9\uff0c\u4e5f\u53ef\u6307\u4e00\u6bb5\u65f6\u95f4\uff0cwhile\u662fduring the time that\uff0c\u53ea\u6307\u4e00\u6bb5\u65f6\u95f4\u3002
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\u65f6\u95f4\u72b6\u8bed\u4ece\u53e5\uff1a
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\u5728\u590d\u5408\u53e5\u4e2d\uff0c\u62c5\u4efb\u72b6\u8bed\u6210\u5206\u7684\u4ece\u53e5\u79f0\u4e3a\u72b6\u8bed\u4ece\u53e5\u3002\u65f6\u95f4\u72b6\u8bed\u4ece\u53e5\u8bf4\u660e\u4e3b\u53e5\u52a8\u4f5c\u53d1\u751f\u6216\u8fdb\u884c\u7684\u65f6\u95f4\u3002\u72b6\u8bed\u4ece\u53e5\u7531\u8fde\u8bcd\u5f15\u5bfc\uff0c\u5176\u4f4d\u7f6e\u901a\u5e38\u53ef\u4ee5\u653e\u5728\u53e5\u9996\u6216\u53e5\u672b\u3002\u653e\u5728\u53e5\u9996\u65f6\uff0c\u5e38\u7528\u9017\u53f7\u4e0e\u4e3b\u53e5\u5206\u5f00\uff1b\u653e\u5728\u53e5\u672b\u65f6\uff0c\u4ece\u53e5\u524d\u9762\u5f80\u5f80\u4e0d\u52a0\u9017\u53f7\u3002
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-\u65f6\u95f4\u72b6\u8bed\u4ece\u53e5
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-when
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-while
"when"表示两个事件发生的时间是相互关联的，一个事件发生后另一个事件立即发生。例如：When I arrived at the airport, the plane had already taken off. （当我到达机场时，飞机已经起飞了。）I always drink coffee when I wake up. （我每天一起床就喝咖啡。）
"while"表示两个事件发生的时间是同时进行的，它们可能会重叠或者在同一时间段内发生。例如：While I was watching TV, my phone rang. （当我在看电视时，手机响了。）I listened to music while I was cleaning the house. （我在打扫房子的时候听音乐。）
总之，"when"和"while"都用来描述时间关系，但是"when"通常用于描述两个事件之间的先后关系，而"while"则通常用于描述两个事件之间的同时性。
While一般在句首，而When一般在句中。
例如：
1.While we were having supper,all the lights went out.
我们吃饭的时候，灯灭了。
2.What were you doing When came into the classroom?
当老师走进教室时，你正在做什么？
像在第一个句子中，While表示在……的时候，所以were后用动词的现在进行时，因为句子中出现了were，所以逗号后的went也是过去分词。
在第二个句子中，When表示在某个时间，所以were后的动词do应为现在进行时，而其后的come因为句子中出现了were，则要用它的过去分词came。
所以，过去进行时的句子构成为：
肯定句：主语+was/were+现在分词+其他.
否定句：主语+was/were+not+现在分词+其他.
疑问句：Was/Were+主语+现在分词+其他？
Yes，主语+was/were.
No，主语+wasn't/weren't.
as和when、while的区别
while后加及物动词
when后加及物或不及物动词
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