英语中,must have been 和 must have +过去分词,有什么区别
英语中,must have been 和 must have +过去分词,有什么区别
must be和must have been有什么区别
have+been+过去分词和have+过去分词有什么区别?
have been +过去分词,和had been+过去分词,有什么区别?
have+过去分词和have been+过去分词的区别
must have been doing与must have been done都表示推测,有什么区别呀?
must have/ must have been的区别
have been doing 和have+过去分词有什么不同?
will/must/would /have/has/must have been + 过去分词各怎麼翻译?
have+过去分词 和 had +过去分词 有什么区别
must和 have to有什么区别?
must be和must have be有什么区别