热心网友
when 表示短动作,除基本用法外, 还表示突然;while 长动作,另外表对比adv。（副词）At what time:什么时候：When will we leave?我们什么时候离开?conj。（连接词）At the time that:在…的时候：in the spring, when the snow melts。在春天，当雪融化的时候As soon as:一…就…：I'll call you when I get there。我一到那里就给你打电话Whenever:无论什么时候：When the wind blows, all the doors rattle。只要风一吹，这门就吱嘎作响During the time at which; while:在…期间，当…时：When I was young, I was sick all the time。在我小时候我总是生病Whereas; although:虽然，尽管：She stopped short when she ought to have continued。尽管她应该继续下去，她却突然停住了Considering that; if:考虑到，如果：How can he get good grades when he won't study?他不用功的话怎么拿高分呢?pron。（代词）What or which time:什么时候：Since when has this been going on?从什么时候起事情象这样?n。（名词）The time or date:时间或日期：Have they decided the where and when?他们已经定下来地点和时间了吗?A period of time:一段时间：stay for a while; sang all the while。See Usage Note at awhile 停留下会儿；一直都在唱歌参见 awhileThe time, effort, or trouble taken in doing something:费时：做一件事情的花费时间、努力或工夫：The project wasn't worth my while。这项方案不值得我花工夫，conj。（连接词）As long as; during the time that:只要；在…时间里：It was lovely while it lasted。当它开着的时间它是很惹人喜爱的At the same time that; although:在…同时；尽管，虽然：While the grandparents love the children, they are strict with them。“虽然祖父母们都爱他们的孩子，但却对他们要求严格”Whereas; and:然而；而，而且：The soles are leather, while the uppers are canvas。鞋跟是皮的，而鞋面是帆布的， 。（及物动词）whiled， g， whilesTo spend (time) idly or pleasantly:消磨：闲散或轻松地消磨时间：while the hours away。消磨时光。
热心网友
while是延续性的词，而when是短暂性的词。when是一个时间点，而while是一个时间段
热心网友
when和while都是表时间的，when——当...时，更强调具体时间点。while——在...期间，表示在某一时段内。比如：1.It was rainning when we arrived.我们到的时候正好下雨了。 2.She worked in a bank for a while befor studying law.——她学法律之前在银行工作过一段时间。这都是最基本的用法，你可以查查词典，里面讲的很清楚。