however,she was gone by the time the waitress came back 为会么用was gone,而不是has gone,be
问题描述：
however,she was gone by the time the waitress came back 为会么用was gone
,而不是has gone,be
答
was gone 过去完成时表示过去进行的动作 has gone是一般现在时
答
was gone 过去完成时表示过去进行的动作,就是"过去完成时"
has gone是"一般现在时"