While 表示一段时间

过去时间关系：常见的用法是用 "while" 表示过去的时间段内同时发生的动作或事件。例如：

She was cooking dinner while he was watching TV.（他在看电视的时候，她在做晚饭。）

现在时间关系："while" 也可以用于表示现在的时间关系，尤其是在口语中，用于表达一种与现在同时进行的动作或事件。例如：

I'll call you while I'm on my way to the office.（我在去办公室的路上给你打电话。）

将来时间关系："while" 还可以用于表示将来的时间关系，通常用于引导将来时态的从句，表示两个将来同时发生的动作或事件。例如：

I will be studying while you are working tomorrow.（明天你工作的时候，我会在学习。）

While we were out.

While you were gone.

While I was waiting.

While we were on vacation.

While he was sleeping.

While she was at work.

While they were away.

While it was raining.

While the sun was shining.

While the kids were playing.