为你解答.
1、你滑雪多长时间?
How long have you been skiing?
2、我滑雪五个小时.
I have been skiing for five hours.
3、我从七岁以来就一直在滑冰.
I have always been skiing since I was seven years old.
4、Alison was the first one to start and has been skating for the whole five hours.
艾利森是第一个开始滑冰的,他已经滑了整整五个小时了.