ever sinceever since后什么时候用过去完成时,什么时候用现在完成时
问题描述：
ever sinceever since后什么时候用过去完成时,什么时候用现在完成时
答
she had lived alone ever since her husband died until she died
丈夫去世后,一直到死她都是寡居.
she has lived alone ever since her husband died
丈夫死后,他一直寡居到现在.