当句子是现在完成时的时候,是用have been还是had been,有什么区别吗

当句子是现在完成时的时候,是用have been还是had been,有什么区别吗 have done.have been done .had done.had been done 有什么区别?怎么用?有 had been和have been有什么区别?请举例 have been 和had been 什么区别 现在完成时have/has gone to,have/has been to,have been in有什么区别 句子中的has been ,have been,had been 代表什么? had done 是过去完成时,have done是现在完成时,那have been和had been呢?be不是动词呀 在现在完成时中have you been in与have you been to有什么区别 英语的现在完成时have,has,have gone,has been有什么区别? have been / has been / had been 的区别 have been doing sth和现在完成时有区别吗? 现在完成时的have been