be used to have done是什么用法?

be used to have done是什么用法? be used to与have used to have been done 和 to be done be believed to have done have sth to be done/have sth done?为什么要用have anyting to be done? have something done 与have sth.to be done 区别 have sth to be done造句 be sorry to have done的用法 Used to have 和 used to be 的区别 1.do sth.,so you will do sth.2.If sb.had done,sb.would have done3.sp.lie/on/to/be located/situated…4.with+宾语+doing/done/to do,主句结构5.sb.be used to doing/sth.be used to do/used to do6.As can be seen,… As we all know,… As is know to us to have done,to be done,to have been done,having done在用法上有什么区别? pretend to be done是什么时态?pretend to be doing pretend to have done pretend to have been done呢? 关于英语非谓语问题非谓语doing having done to do to have done to be doing being done have been done to be done to have been doing done doing,having done,to do,to have done ,to be doing,being done,have been done,to be done,to have been doin It ____ this way.A.used to doB.used to be doneC.is used to doD.is used to be done to be done to have been done to have been doing 形式的造句, 歌曲中含有TO DO ：TO BE DONE ：TO HAVE BEEN DONE ：TO HAVE DONE是班主任让查的, have something done和need to be done如题 请问have to be done ,need to be done怎么使用?是什么时态?表示什么时间段? to be done、being done 和have been done 有什么区别啊~