whlie when during的差别.

whlie when during的差别.
whlie when during的差别
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whlie when during的差别.
辨与析] during,when,while
during后面接名词：I went to visit the Great Wall during the summer vacation.我暑假里去游览了长城.
when,while都意为“当…”,都引导时间状语从句.
when强调时间点,通常译为“当…”,例如：
When she came in,I was cooking.她进来时,我正在做饭.
while强调时间段,通常译为“正当……”,例如：
While he was cooking,a friend of his came to see him.当他正在做饭的时候,一个朋友来拜访他.
参考资料：俞才抡《高中英语学习词典》中国大百科全书出版社

while
n.
1. 一会儿,一段时间[S]
I'll be back in a while.
我一会儿就回来。
conj.
1. 当...的时候,和...同时
She listened closely while he read the letter.
他读信时,她听得很仔细。
I'll take care of your...

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while
n.
1. 一会儿,一段时间[S]
I'll be back in a while.
我一会儿就回来。
conj.
1. 当...的时候,和...同时
She listened closely while he read the letter.
他读信时,她听得很仔细。
I'll take care of your children while you are away.
你不在时我会照顾你的孩子的。
We must strike while the iron is hot.
我们必须趁热打铁。
2. 而,然而
I like tea while she likes coffee.
我喜欢喝茶,而她喜欢喝咖啡。
3. 虽然,尽管
While I like the color of the hat, I do not like its shape.
虽然我喜欢这顶帽子的颜色,但我不喜欢它的形状。
when
ad.
1. (用作疑问副词)什么时候,何时
I'd like to know when they'll let him out.
我想知道他们什么时候放他。
When did you last see Margaret?
你上一次见到玛格丽特是什么时候?
2. (用作关系副词,引导关系从句)当...时
There were times when I didn't know what to do.
有些时候我不知道该怎么办才好。
conj.
1. 当...时
John got engaged to her when travelling last winter.
去年冬天旅行时,约翰与她订了婚。
Don't get excited when you talk.
你说话时别激动。
2. 既然,考虑到
How can he get the promotion when his boss dislikes him?
既然上司不喜欢他,那他怎么会获得提升呢?
3. 虽然,然而
I had only fifteen dollars on me when the book I wanted cost twenty.
我身上只带了十五元钱,可是我想买的那本书定价二十元。
4. 在那时,然后
pron.
1. 什么时候,那时
Since when has she taught here?
她从什么时候开始在这儿教书的?
during
prep.
1. 在...的整个期间
Don't speak during the meal.
吃饭时别说话。
2. 在...期间的某一时候
They met and fell in love with each other during the Second World War.
他们在第二次世界大战期间相遇并相爱。
这是我在百度词典上找的

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WHILE+延续性动词
WHEN+短暂性动词
DURING表示某段时间

while+doing
when一般和while一样
during+具体时间