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CONJ-SUBORD
(表示兩件事同時發生)當…的時候，在…時
If something happens while something else is happening, the two things are happening at the same time.
例句
They were grinning and watching while one man laughed and poured beer over the head of another...
當一個男人大笑著把啤酒倒在另一個人頭上時，他們都在樂呵呵地看著。
I sat on the settee to unwrap the package while he stood by...
我坐在長椅上打開包裹時他就站在旁邊。
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CONJ-SUBORD
(表示某一件事是在另一件事發生過程中的某一時間點發生的)當…的時候，在…時
If something happens while something else happens, the first thing happens at some point during the time that the second thing is happening.
例句
The two ministers have yet to meet, but may do so while in New York...
兩位部長尚未會面，但可能會在紐約碰頭。
Never apply water to a burn from an electric shock while the casualty is still in contact with the electric current.
當被電擊者還連著電時，千萬不要把水弄到電擊傷口上。
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CONJ-SUBORD
卻;但是;然而
You use while at the beginning of a clause to introduce information which contrasts with information in the main clause.
例句
Marianne was tempted to turn the large rooms into traditional French-style salons, while Howard was in favour of a typically English look...
瑪麗安娜想把這些大房間弄成傳統法式客廳的樣子，但是霍華德喜歡典型的英式風格。
The first two services are free, while the third costs ￡35.00.
前兩項服務免費，但是第三項服務要花35英鎊。
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CONJ-SUBORD
雖然;盡管
You use while, before making a statement, in order to introduce information that partly conflicts with your statement.
例句
While the numbers of such developments are relatively small, the potential market is large...
盡管這種增長的數量相對較小，但是潛在的市場是巨大的。
While the modelling business is by no means easy to get into, the good model, male or female, will always be in demand...
盡管模特行業絕不是那么容易進入的，但是好的模特，不論男女，總是需要的。