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when和while的區別

when和while的區別

when可用作並列連詞,表示“這時(突然)”;while也可以用作並列連詞,表示“而”“卻”(表示對比);但as則沒有類似用法。以下是小編精心編輯的when和while的區別,希望能幫助到大家。

when有鑑於之意,如:

Why do you need a new job when you have got such a good one?

when 有雖然、儘管等讓步之間,如:

They kept digging when they must know there was no hope to escape.

while 有對比之意,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...時候”的意思。

主從句都是長時間的'動作時,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不用於短時間的動作(這個大家應該都知道)

when和while的區別

(1)when即at the time that…,指「在……之時」,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」,但其所表示的「同時」須有「持續性」,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「時間點」(a point of time),例如:

錯:While I finished my letter, I posted it.

因為動作具有「瞬間性」。

(4)while可用於對比(contrast),when則不可,例如:

Mary is in blue while Cindy is in black.

瑪麗穿藍色衫,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「儘管」(although),例如:

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