问下被动语态问题,have been done 是现在完成时的被动语态,那we have done this homework怎么改被动?应该是This homework has been done by us,但是翻译怎么都不对啊.

问下被动语态问题,have been done 是现在完成时的被动语态,那we have done this homework怎么改被动?应该是This homework has been done by us,但是翻译怎么都不对啊. have been married 是被动语态吗 完成时被动语态为什么是have been done为什么不是 have be done什么情况下 be变成been have been here 是被动语态吗有have been 这个不是被动的意思吗 被动语态的用法表格 比如过去式被动语态用have+been+过去分词 被动语态的用法表格 比如过去式被动语态用have+been+过去分词 被动语态的用法表格 比如过去式被动语态用have+been+过去分词 列表 His bikes have been sold out的被动语态是什么 I have been to America three times 的被动语态 1.we have written a lot of e-mail on the computer in the past few years（改为被动语态）问下have written是不是改成have been written为什么2.as years have gone by ,computers have been made smaller and smaller.(改为主动语态）3.th It's a pity that theconcert has been cancelled.是被动语态吗?平常现在完成时什么情况下会加入been ,什么情况下加入 have been 而不是被动语态 现在完成时被动i have been excited several days...为什么excited前面加been变成被动语态? Great changes__place in China since 1978.A.have been taken B.have taken C.has been taken D.took可为什么不用被动语态呢? what( )with the old books?a.has been done b.has done c.have been done d.have done 为何用被动语态 现在完成进行时变被动语态的问题We have been discussing the problem all the evening.怎么变被动? 主动语态转化被动语态.I have been to america twice. 问一下被动语态 含有be动词的被动语态怎么变,have been done一定指被动吗