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I had done ,I have done ,I am done有何区别

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/10/04 18:05:56
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
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