ought to have done 指主观上本来应该做而未做
should have done 指客观上本来应该做而未做
needn,t have done 不需要做而做了
shouldn't have done 不应该做而做了
need have done 楼下已经帮你写了 看他的就可以了 比我的详细 不想抄袭他的