参考书上说这句话是unless引导的非真实条件句中的条件从句,可是为什么从句谓语动词不是过去式呢?Don't touch anything unless your teacher tells you to.

分类: 作业答案 • 2022-01-02 15:31:26

问题描述：

参考书上说这句话是unless引导的非真实条件句中的条件从句,可是为什么从句谓语动词不是过去式呢?
Don't touch anything unless your teacher tells you to.

答

Don't touch anything unless your teacher tells you to.该句中的unless并不是引导的非真实条件句,因为该句前后的谓语动词都表示非真实的形式.如果是,应该按楼主的理解,从句用过去时,主句用would/could/might/shoul...