I had done ,I have done ,I am done有何区别
问题描述:
I had done ,I have done ,I am done有何区别
完成时,过去分词等全部都没学
答
i had done 我在过去的某个时间之前已经做过某事
i have done 我已经做过某事
i am done 我做完了某事