- LouisLv 79 年前最佳解答
She had sprained her ankle while playing tennis.
Could you look after the children while I cook lunch?
While in prison he shared a cell with Ron Spicer.(while當附屬連接詞用，表示同時期）
While I agree with you, I don't believe that your way is best.(while當附屬連接詞用，只表示讓步條件）
When he saw me, he waved. (當附屬連接詞用，表示在某一個時間點上）
Do you know when these houses were built? (當關係副詞，用在問句，問時間點）
I remember the day when the war began. (當關係副詞，用在關係子句裡，指時間點）
- DaSaGwaLv 79 年前
This is a very good question, but it cannot be answered easily. Master Louis's answer is just a few ways to look at it. Here are a few site you can refer to, they will give you even more aspects of this question:
2012-02-06 14:44:28 補充：
2012-02-06 14:46:09 補充：
Generally speaking, when you use English for a certain time, you will develop a feeling about these two words. By that time, you pretty much can use it at will.