英语知识求助

Question

本人有几个英语问题请大家帮帮忙！~请问have been done ； has been done ； had been done ；had done 有什么区别？

Answer 1

have 跟has就是单复数的区别啊

had been done是过去已经被完成的事
had done是过去已经完成的事

Answer 2

have been done是现在完成时的被动语态谓语构成形式has been done也是现在完成时被动语态谓语构成形式但它的主语是单数第三人称
had done 是过去完成时的谓语构成形式，是指过去的过去
had been done 是过去完成时的被动语态谓语构成形式

Answer 3

have been done ； 主语复数
has been done ； 主语单数
had been done 过去时

had done 是已经完成，而上面是已经被完成

Answer 4

前两个主语不一样，第一个复数，第二个单数；第三个用在过去时，前三都是被动；第四个是主动。