1在…期间；当…的时候 
during the time that sth is happening
同义词： when
We must have been burgled while we were asleep.
我们睡着时一定让贼入室偷了。
Her parents died while she was still at school.
她还在读书时父母就去世了。
While I was waiting at the bus stop, three buses went by in the opposite direction.
我在公共汽车站等车时，对向驶过了三辆公共汽车。
2
与…同时 
at the same time as sth else is happeningdo while语句怎么用
You can go swimming while I'm having lunch.
我吃午饭时你可以去游泳。
shoes mended while you wait
在你等候的时候修的鞋
3
（对比两件事物）…而，…然而 
used to contrast two things
While Tom's very good at science, his brother is absolutely hopeless.
汤姆很擅长理科，而他的兄弟绝对是不可救药。
4
(used at the beginning of a sentence 用于句首) 虽然；尽管 
although; despite the fact that…
While I am willing to help, I do not have much time available.
尽管我愿意帮忙，但是没有多少时间。
5
(NEngE) 到…时；直到…为止 
until
I waited while six o'clock.
我一直等到了六点钟。
习语
while you're/I'm etc. at it
趁做某事的时候；顺便；顺带 
used to suggest that sb could do sth while they are doing sth else
‘I'm just going to buy some postcards.’ ‘Can you get me some stamps while you're at it?’
“我正想去买明信片。”“你能顺便给我买些邮票吗？”

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