# 急~while和when要怎麼區分

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有一個比較好記的方式:

when+過去簡單式 1, 過去簡單式 2

1 表先發生的動作, 2 表後發生的動作

Ex: When the phone rang, I went to answer it.

when+簡單式(突然性動作), 進行式(持續性動作)

簡單式表插入的動作, 進行式表被該動作插入前正在進行中的動作

Ex: When the phone rang, I was taking a shower(持續性動作).

while+進行式(持續性動作), 簡單式(突然性動作)

Ex: While I was taking a shower, the phone rang.

while+進行式 1, 進行式 2

表示兩個動作無先後問題, 同時在發生

Ex: While I was studying at home, some people were fooling around outside.

(1) 對兩個進行式動作而言，when和while基本上是沒分別的

When/While she is doing her homework, her mother is preparing the dinner.

(2) 對一個進行式動作和一個現在/過去式動作，只有進行式動作可以配while

When/While she was doing her homework, her brother disturbed her.

When her brother disturbed her, she was doing her homework.

While she had been studying in school for 6 years, she don&#39;t know what the twenty-six letters are.

(3) 對兩個現在/過去式動作而言

(a) 當作對比的時候，必定用while

She arrived school at 8pm while I arrived at 8:15pm.

I like coffe while he likes tea.

While I am a girl, he is a boy.

While she is a doctor, she can&#39;t cure herself.

(b) 在兩個動作同時發生的情況下，一般用when

When she knew that her mother had died, she couldn&#39;t help crying.

When she arrived school at 8pm, she couldn&#39;t see me.

(4) 對一個完成式動作和一個現在/過去式動作，一般用when

When she arrived at home, the rain had stopped.

When she arrived home, the rain had stopped.

When she saw the bird, it had died.

when是廣義上的同時, 說明某段時間上進行的行為或習慣

eg: When I was young, I listened to the radio.

while是時間緊密上的同時, 特別強調某一時間點上同時發生的事情

eg: He is listening to the radio while I come in.

Use &#39;while&#39; to describe &#39;happening in a period of time&#39;;

use &#39;when&#39; or &#39;as&#39; to describe &#39;happening at the same time&#39;.

Source(s): me

while一段時間內

while she is cooking, he is watching a TV.

when當

when you were leaving the Cafe, I was looking at you.

Source(s): myself

簡單來說

when

是用在一個時間點

如果有一個固定的時間點 就用when

但when跟what time常常被混用要小心點

例如:When did you last see Margaret?

(你上一次見到瑪格麗特是什麼時候?)

while

是用在當xx正在做某件事情 同一時間

又發生另一件事情 就會使用while

例如:She listened closely while he read the letter.

(他讀信時,她聽得很仔細。)

Source(s): my memory

while時間較短 ex: while she stays here

when時間較長 ex:when I was a kid

第一句後面接的子句時間較短

而第二句後面接的子句可以是較長或較短皆可

Source(s): 剛考完基側的我

while→是指剛好在一段時間內

例：He came back home while I was eating dinner.

eating dunner 是一段時間 所以用while

when→是指剛好在那個時間點

例：He came back home when it started to rain.

started to rain 是一個時間點 所以用when

希望有幫助到大大~~

Source(s): 自己~~