had gone和had been 有什么区别?

had gone,表示某人去了某地,还没回来.
had been gone,表示某人已经去世或是离开很久很久了.
例：
He ate the apple before he had gone to school.他去学校前就吃了那个苹果了.（意思是他还在学校.）
He had been gone for a year.他消失/他去世整整一年了.（一般用于感叹的语气.）