When同 while有咩唔同 Fast!!!!!!!!!!!!!!!!!!!!!!!!!!!

When, While

句式結構

(1)“When”, “while” 解作「當‥‥‥時」，放在句首時，緊記用逗號把兩句句子連接。

When …, ...
While

(2)亦可放在兩句句子之間，但必須把逗號刪掉。

... when ...
... while ...

運用方法

(1)當一個動作進行時，突然有另一個動作發生，我們便用”when”, “while”來表示那持續時間較長的動作。

(2)那持續時間較長的動作用現在進行式/過去進行式來表示，而那持續時間較短的動作則用簡單現在式/簡單過去式表示。

A bird flew into the house while/ when I was opening the door.
我開門時，有一隻鳥飛進屋裏。

(3)若兩個動作同時發生，我們均要兩句句子裏用現在進行式/過去進行式。

Paul is /was laughing while Mary is /was talking.
瑪莉在說話，保羅在大笑。

例子：
The baby _____________ (cry) while the mother was talking to her friends.
The baby was crying/cried while the mother was talking to her friends.

When the students were doing the test, the bell______ (ring).
When the students were doing the test, the bell rang.

When we were swimming, the rain______ (begin).
When we were swimming, the rain began.

He broke his leg when he __________ (climb) the slope.
He broke his leg when he was climbing the slope.

While Michael __________ (wash) the fish, Sam was frying the vegetables.
While Michael was washing the fish, Sam was frying the vegetables.

As I know,

When之後係用present tense or past tense.
While 之後係用past continues tense.