had been和havev been中为什么要加been?在现在完成时（have been）和过去完成时(had been)通常会有一个been出现,been是be 的过去分词,have和had是助动词,问：这里有助动词了为什么还要用been?这两种时态

had been和havev been中为什么要加been?在现在完成时（have been）和过去完成时(had been)通常会有一个been出现,been是be 的过去分词,have和had是助动词,问：这里有助动词了为什么还要用been?这两种时态 英语,has been和 had been had been had been doing 和had been done有什么差别 had been doing 和had been done有什么差别? had been和had been to的区别 Had been telling和 Had told 求问had gone和had been 我想问一下完成时态中 has been ,have heen 和had been 能举例吗, had been 和 has/have been的区别是什么? had been和have been有什么区别?请举例 初中英语语法has been和had been的区别 have been to和had been to的区别 had been 的意思和用法? what had been done had been done. had been done和 had done有什么区别呢? 英语had done 和had been done区别 had gone和had been 有什么区别?