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

have been done 和 to be done 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 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 有关have done 和be done的问题,什么时候用be done 什么时候用 have 以及have been done. 十万火急what should be done have benn done为什么要将have改为has? have been done和be done的区别 must be done和 must have done区别 be done,have done ,having done和done之间的去别做题时怎么分别他们啊 All that can be done___A.have been done B.have done C.has been done D.has done为什么选C怎么解释? All that can be done___________A.has done B.has been done C.have done D.have been done 请选入合适的选项.并解释原因, —How are things getting on?—All that can be done____.A.has been done B.have been done C.has done D.have done All that can be done__________.A.has been done B.has doneC.have been doneD.have done All that can be done __been done.请问该用has还是 have? you may surf the interent if your workA has done B have done C will be done Dis donr have done与have be done to be done、being done 和have been done 有什么区别啊~ Has all that can be done been done?为什么用HAS 不用 HAVE但是PEOPLE也是整体，动词用复数