should have done的反义疑问句是什么 是 shouldn't it 还是 didn't it 还是 was

要分情况的,如果有明显的时间状语,比如,you should have done it yesterday,didnlt you?
用didn't
如果没有明显的时间状语,那么就是,you should have fininshed the task,haven't you?
一般而言,不要考虑词语背后的含义,英语考的是语法,所以只要看字面上就好了,should就是肯定形式了