Question

i would have not done 还是 i would not have done i could have not done or i could not have done ？

Answer 1

答案是i would not have done. i could not have done 因为主句用should/could/might/would+(not)have done.表示对从句如果实现的结果.
是对过去的虚拟

Answer 2

i would not have done
i could not have done
这是情态动词的用法

Answer 3

I would not have done 和 I could not have done
这种结构才是正确的

Answer 4

i would not have done

Answer 5

i would have not done