Question

请教几个英语短语！

1 could have done
2 should have done
3 ought to have done
4 shouldn't have done
5 needn't have done
什么意思？谢谢大家

Answer 1

1 could have done 本来可以做却没做
2 should have done 本来应做却没做
3 ought to have done 本来应做却没做
4 shouldn't have done 本来不应做却做了
5 needn't have done 本来不需要做却做了

这是现在完成时的特殊用法之一~
希望可以帮到你^-^

追问

第1、2个可以翻译成 过去原本能做某事，但没做 过去应该做某事，但没做吗？