my sister _______(stay)in Beijing for three months last year为什么用stayed不用has been staying

分类: 作业答案 • 2021-12-19 17:07:36

问题描述：

my sister _______(stay)in Beijing for three months last year
为什么用stayed不用has been staying

答

last year暗示是去年的动作（现在不在北京了）.所以用过去时.has been staying表示一直（至今）待在北京.