Question

had done时态 , have been done语态 , done 非谓语 三个有什么区别？

Answer 1

had done 过去完成时的主动语态结构 have been done 现在完成时的被动语态结构 done 为过去分词 前两个结构在句中充当谓语，而done当然不能单独做句子谓语。 如：I had read these books before you came here. These books have been read by me. 2. 第三个不做句子谓语，可做定语，状语，补足语等，表示被动关系和动作的完成 如：Encouraged by my teacher, I decided to work harder.