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

Question

should have done 可以表示 本应该做却没做
或者可以表没把握的肯定推测 这两种表达方式的反义疑问句 有没有不同的语法规则
should do 表应该做某事 它的反义疑问句是什么呢~~ 求高手解答 谢谢~~

Answer 1

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

Answer 2

shouldn‘t it