The Summer Palace is wonderful .Have you ever visited any other interesting placeshave been had been为什么
问题描述：
The Summer Palace is wonderful .Have you ever visited any other interesting places
have been had been
为什么
答
have been 现在完成时,这里是说：你曾经去过吗?had been 是过去完成时.had been是过去完成时结构：had+动词过去分词：表示两个事件中一个发生在前,或者说是表示较早的过去.After they had entered the house,they w...