did 表过去have done表过去的过去?那had done呢?

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• =英语一直不好的说 be后面加一个动词的过去式就是表被动?然后一般过去时的被动形式就是be+done吧?was/were +动词原形就是过去干什么什么,那was /were+动词的过去式有什么什么意思?be+动词过去式又是什么意思的说?have been done 的被动式是什么
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• did 表过去have done表过去的过去?那had done呢?
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