had been doing是主动还是被动
had been doing是主动还是被动
having been done是主动还是被动还是什么?
risk doing 表被动还是主动?
sell是被动还是主动?
having been done 是主动还是被动,为什么have 出现having ing形式?分词是表示主动吧?看看这
Have been doing 的被动语态是?
法律制裁是主动还是被动承担法律责任?
give born to是主动还是被动
had been doing是什么是时态?
have/had been down怎么看是表示被动还是延续?
现在完成进行时的主动和被动语态都是have been doing吗?
现在完成进行时的被动语态结构是have been +过去分词还是have been+doing