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when和while的區(qū)別
when可用作并列連詞,表示“這時(shí)(突然)”;while也可以用作并列連詞,表示“而”“卻”(表示對(duì)比);但as則沒有類似用法。本文是大學(xué)網(wǎng)unjs.com小編精心編輯的when和while的相關(guān)內(nèi)容,希望能幫助到你!
when有鑒于之意,如:
Why do you need a new job when you have got such a good one?
when 有雖然、盡管等讓步之間,如:
They kept digging when they must know there was no hope to escape.
while 有對(duì)比之意,譯為“而”。如:
That region has plenty of natural resouces, while this one has none.
while 有表示“部分同意”之意,如:
While she is likable girl, she is difficult to work with.
when和while 都有“在...時(shí)候”的意思。
主從句都是長時(shí)間的動(dòng)作時(shí),只用while;
While she read the paper, I cleared up the kitchen.
涉及到年齡和生活的不同階段,用when;
When I was a child , I lived in London.
while不用于短時(shí)間的動(dòng)作(這個(gè)大家應(yīng)該都知道)
when和while的區(qū)別
(1)when即at the time that…,指「在……之時(shí)」,例如:
When I finished my letter, I posted it.
我寫完信便寄出。
(2)while即at the same time that…,亦指「在……之時(shí)」,但其所表示的「同時(shí)」須有「持續(xù)性」,例如:
We must strike while the iron is hot.
我們必須趁熱打鐵。
(3)while不可用來表示「時(shí)間點(diǎn)」(a point of time),例如:
錯(cuò):While I finished my letter, I posted it.
因?yàn)閯?dòng)作具有「瞬間性」。
(4)while可用于對(duì)比(contrast),when則不可,例如:
Mary is in blue while Cindy is in black.
瑪麗穿藍(lán)色衫,而仙蒂穿黑色衫。
(5)while又可表示「只要」(as long as),例如:
While there is life, there is hope.
留得青山在,不怕沒柴燒。
(6)再可表示「盡管」(although),例如:
While I admit that the task is difficult, I don't think that it is impossible.
[when和while的區(qū)別]
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