晶体管高速开关电路:meant to have done

meant to have done We have done thing we ought not to have done and___undone things we ought to have done. have sth to be done和have sth done的区别是什么？ 翻译 what have you done to correct your weaknesses? 动词不定式的完成式 to have done 表示什么? 非谓语中to have done 表什么? somebody was thought to do/ have done......句型中，何时用to do，何时have done have sth to do \have sth do\have sth done的区别 would to have done结构与would have like to do结构有什么区别？ 非谓语动词having been done,to have been done什么时候用？