.there had never been any sounds like that.请问had been 怎么讲啊.被

.there had never been any sounds like that.请问had been 怎么讲啊.被 We had never been there before 英语问题：Never had he had any experience like that. 英语翻译If there had ever been any danger that the United States in class ,i learned that there had never been a nobel prize a prosperity that had never been seen before appea She said （that）she had never been to Paris. A prosperity which /that had never been seen before appears A prosperity which / that had never been seen before appears If there had not been 改成 had not there been I had been there before It turned out that he had never been there.在这个句子中,it是什么用法,是形