while引导状语从句的主要用法有两种
1.表示“当(在)……的时候”.如:
We must strike while the iron is hot.我们要趁热打铁.
Were there any calls for me while I was out?我出去的时候,有人来过电话吗?
Stand still while I take your photograph.我给你拍照时站着不要动.
2.表示“尽管,虽然”.如:
While the work was difficult,it was interesting.虽然工作有难度,但很有趣.
While I understand what you say,I can’t agree with you.虽然我理解你的意思,但我还是不同意.