How long has alison been skating?

How long has alison been skating? How long has he been skating? Alison has been skating for five hours. how long has Alison been skateing?与how long did Sam skate的区别 还有一个噢,How long has he been skating? 请问 How long has She been skating?How long has She skated?How How long have you been skating? Alison was the first one ___,and has been skating for the wh Alison was the first one to start and has been skating for t Alison has been skating since five hours ago 对划线部分提问 八年级下册英语书语法：How long have you been skating?I've been skating how long have you been skating?怎么回答