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when和while的區(qū)別

時(shí)間:2022-03-24 02:07:12 科普知識(shí) 我要投稿
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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(méi)有類似用法。以下是小編精心編輯的when和while的區(qū)別,希望能幫助到大家。

  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(zhǎng)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(lái)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(méi)柴燒。

  (6)再可表示「盡管」(although),例如:

  While I admit that the task is difficult, I dont think that it is impossible.

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