用must have been/done或can*t have been/done 改写句子
用must have been/done或can*t have been/done 改写句子
用(can't ) ( have been/done ) (must have been /done) 改写句子
用can't have been/done must have been /done 改写句子
MUST have been done
must have been done must have done
用括号里的正确形式填空和句型转换(用must have been/done 或can't have been/done改
must have been done/must be done
can be done was done could be done must have been done will
有must/could/can/may/maight have been done吗
must have been done是什么被动语态
have done.have been done .had done.had been done 有什么区别?怎么用?有
must have been与must have done的区别?