be done,have done ,having done和done之间的去别做题时怎么分别他们啊

have done与have be done have been done 和 to be done be believed to have done be done,have done ,having done和done之间的去别做题时怎么分别他们啊 have something done 与have sth.to be done 区别 have sth to be done/have sth done?为什么要用have anyting to be done? 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. have done还是be done是被动语态, must have been done/must be done求解两者异同 have been done和be done的区别 must be done和 must have done区别 be done be done can't be done.should be done.should have done什么意思哈.. to have done,to be done,to have been done,having done在用法上有什么区别? to be done、being done 和have been done 有什么区别啊~ have sth to be done造句 must be must have done 区别