how long did you skate today?和how long have you been skating today 有何区别

问题描述:

how long did you skate today?和how long have you been skating today 有何区别

好像没啥区别,我也不清楚。。

“你今天共花了多长的时间滑冰?”
how long did you skate today?
(问这句话的时候,是对方早已经结束滑冰了)--过去时
how long have you been skating today
(问这句话的时候,是对方仍在继续滑冰或刚准备要结束滑冰)--现在完成进行时