while与when的区别?详细
while:
名词 n。 时间
a space time
· I haven't seen him for a long while。
我好久没有看见他了。
· They began to walk again after a while。
过了一会儿，他们又开始走了。
· Let's rest for a while。
让我们休息一会儿吧。
连词 conj。 当…的时候，和…同时
during the time that
· The telephone rang while I was in the garden。
我在花园里的时候电话铃响了。
· Work while yo...全部
while:
名词 n。 时间
a space time
· I haven't seen him for a long while。
我好久没有看见他了。
· They began to walk again after a while。
过了一会儿，他们又开始走了。
· Let's rest for a while。
让我们休息一会儿吧。
连词 conj。 当…的时候，和…同时
during the time that
· The telephone rang while I was in the garden。
我在花园里的时候电话铃响了。
· Work while you work, play while you play。
工作时就工作，玩耍时就玩耍。
连词 conj。
而；然而
whereas
· Some men are rich while others are poor。
有人富，（而）有人穷。
· He was not able to hatch chickens while the hen could。
母鸡能孵出小鸡来，而他却不能。
· While I like the color of the hat,I do not like its shape。
我虽然喜欢这顶帽子的颜色，但却不喜欢它的样式。
动词 v。 度过；消磨时间
spend;cause to pass pleasantly and smoothly
· She whiled away the hours of waiting by looking at the shops。
她以浏览橱窗来消磨等候的时间。
· He whiled away his time playing or walking。
他以玩（球、牌等）和散步来消磨时间。
when:
副词 adv。
什么时候，何时
at what time
· When can you come to see me?
你什么时候来看我？
· When did you go to bed last night?
昨晚你什么时候睡觉的？
· When are you going to return it?
你准备什么时候还（书）？
副词 adv。
是…时候
at which;on which
· Please tell me when we'll have the meeting。
请告诉我我们什么时候开会。
· I wonder when that was。
我不知道那是什么时候的事。
副词 adv。 在…的时候
at or during which
· How I regretted the days when I had played and should have studied!
我多么懊悔我本该好好学习却玩掉了的那么多的日子！
副词 adv。
那时
but at that moment
· It happened on a day in November when the weather was very wet and cold。
这事发生在十一月的一天，那时天气又潮湿又寒冷。
· We were about to start,when it began to rain。
我们刚要出发时开始下雨了。
连词 conj。 当…时
at the time when
· It happened when I was living in the country。
这事发生在我住在农村的时候。
· It was raining when we arrived。
我们到达时，天正下着雨。
· He always comes on those days when I am busy。
他总在我忙的日子来。
· I was walking along the stream,when I met my teacher of English。
当我沿着小溪散步时遇到了英语老师。
连词 conj。 一…就
immediately after
· When I had finished dinner I went to bed。
我吃完饭就睡觉了。
· She was very surprised when she saw me。
她见到我非常惊讶。
· Let us set out when the sun has risen。
太阳一出来，我们就动身。
代词 pron。 （关系代词）那时
which time
· I came here in 1949, since when I have been engaged in this work。
我1949年到这里，从那时起我就担任这项工作。
· We came a week ago,since when the weather has been bad。
我们在一星期前来此，从那时起天气就一直不好。
代词 pron。
（疑问代词）什么时候
what time
· Since when have you been here?
你从何时起在此地？
· Until when can you stay?
你能呆到什么时候？
很重要的一点就是WHILE 可以跟现在分词 WHEN不可以
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