She has always been busy () it is Sunday.1.except 2.except for 3.except that 4.except when为什么一定要加一个when 1为什么不行?

分类: 作业答案 • 2021-12-19 11:46:32

问题描述：

She has always been busy () it is Sunday.
1.except 2.except for 3.except that 4.except when
为什么一定要加一个when 1为什么不行?

答

when 在这里是引导词是关系副词因为你后面的it is Sunday是一个从句既然这里是句子就需要引导词而后面的是表示时间的所以就用when 而1差when这个引导词