为什么是has been dead不是has dead

为什么是has been dead不是has dead Her grandmother has been dead for two years 为什么是Her grandmother has been dead for two years 为什么是用dead形容词,而不是died 不是现在完成时吗? 为什么是he has been dead for 10 years而不是he has dead for 10 years?为什么I have studied English for 10 years是对的? it was said that his father___A.has died B.died C.has been dead D.had died为什么不能选B,而且表示两件过去的事情,不是要先 过去完成时+过去时?这里为什么是过去时+过去完成时? His father has been dead for two years为什么用been?been不是表被动吗? My grandfather has been dead for many years.这句话为什么用has been的形式 死亡为什么是被动语态?还有My brother has never been abroad before.这句话为什么也用被动语态? “There has been great changes in computers in the last few year”为什么是 has been不是have had Tom’s grandfather （has been dead） for five years为什么不是has been died? 告诉我原因谢谢. has been died 与has been dead的区别.. Love has been dead什么意思 为什么是has not been decided he died 3 year ago ,that's to say,he____for 3 years.答案是has been dead为什么不是has dead,这也是过去完成时啊 my brother has been abroad before有谁能解释一下为什么是been abroad,abroad不是副词吗新概念的 How long has your grandmother___?a.died b.has been died c.dead d.been dead has died,died、has been dead都怎么用? I got caughtin the rain and my suit has been ruinedI got caught in the rain and my suit has been ruined为什么是has been ruined 不是had been ruined 呢 He has been dead for many years.为什么用dead?此处不是该用动词吗?此句动词是什么呀? what's the weather like this autumn here?There ______very little rain.A has B are C has been D have been 为什么是has 不是have?has been 修饰rain吗？