英语翻译请问为什么不是 has been opened?

英语翻译请问为什么不是 has been opened? Some of the time () qlready passedA has B has been请问为什么不是B He has been there for six months.为什么不是has been in there? The ice has been melted .为什么这个现在完成时要加been,been不是被动语态吗? His father has been dead for two years为什么用been?been不是表被动吗? He has been worried all week.为什么用has been worried,而不是has worriedhas been worried 不是被动吗?为什么要加 been 英语翻译请问这句话没看到被动语态啊 怎么“被送去”呢?还有 这句话看来病人送去了 还没回来 为什么用has been to啊 这意思是去了已经回来了啊 不是应该用has been吗? 英语语法：Someone has been here.为什么不是in hereSomeone has been in my office.这里为什么又要有in? 英语完成时态的构成请问英语完成进行时态的构成为什么不是have,has加现在分词呢?为什么要加been呢? He has been to Canada.So have I.这里为什么不是 So has I 呢 Tom’s grandfather （has been dead） for five years为什么不是has been died? 告诉我原因谢谢. i wonder how long has he been away from australia 为什么不是i wonder how long he has been away .. 英语翻译have been不是应该表示“曾经去过,现在不在那了“吗,为什么要用在这句话里,这然话为什么不用has gone,has gone不是应该表示去了,还没回来的意思吗 英语 完成时It has been raining for three hours.为什么要加been?加been不是表被动么? 雨已经停了It has been stopped请问为什么不能说：It has stopped there has been...为什么要加been? 请问下面句中的simple predicate and subject都是什么?1.This book was studied two years ago.2.He has been informed.simple predicate为什么不适studied而是was?为什么不是informed而是has? 英语：为什么填has been