has been done,had been done 的区别是什么?

is done,was done的被动语态是?is being done,was being done,has been done,had been done,will be done的被动语态是? has been done,had been done 的区别是什么? can be done has been Everything that can be done has been done 中can be done has been done I think I have tried my best.All that can be done ___.A.has done B.has been done C.had done D.had been done为什么选B不选D I think have tried my best.All that can be done ___ .A.has done B.has been done C.had done D.had been done为什么选B Has all_can be done Awhat,done Bthat,been done Cthat,be done Dwhat,already done all that can be done has been done. what had been done had been done. has been done 与had been done要怎么用啊 来一位高手辨析一下这个英语区别has done had done has been done had been done 区别是什么如何翻译? 1.be done和have/has/had been done之间区别!请举例!2.表转折时while与but用法区别最好举例 Much___to fight against pollution.A.have been done B,has been done C,had been done D.has done为什么是选B? what has been done can not be undone America has never been about what can be done for all that can be done has been done为什么用HAS all that can be done has been done 为什么要用has,不用have 19.All that can be done .　　A.have been done B.have done C.has been done D.has done顺便,翻译一下这句话吧 My work ___,I went home.A.had been done B.done C.having done D.to be done