1.She has a meeting.The bank will be closed when she is finished.为什么不是直接就finished而是is finished？
2.I have to stay late at work for a meeting.这个at work在这里是怎么用的，请再给我举几个这样的例子
1. finished 在这里是形容词，作表语。如果用动词finish，不能用过去时而应该用一般现在时：when she finishes。2. at work 是介词短语，在这里作状语，意思是在班上。类似的例子：You can call me at work. at work作状语I am at work right now.
at work作表语Are you bored at work?
at work作状语at work有另一个意思，就是”正在工作中”。例如：GE is imagination at work.通用电器是梦想启动未来 (通用电器的广告，直译是通用电器是不停工作的想象力)
