突然看到电影里有she is gone 这句,好像也是“她已经走了”这样跟she has gone什么区别

突然看到电影里有she is gone 这句,好像也是“她已经走了”这样跟she has gone什么区别 She might have gone.她或许已经走了.　句中为什么用have不用had? he has gone跟he had gone 有什么区别? she went home 和she has gone home 有什么区别吗? she has gone还是she is gone还是she was gone? she just gone .she just has gone. when she has gone! She has gone there.同义句. 有How has she gone to school? She is gone he is gone和he has gone什么区别 but she has already gone