1.She has been skating for three years.(就划线部分提问）
问题描述：
1.She has been skating for three years.(就划线部分提问）
————————has she been skating?
2.have been,this university,for,I,working,in,3 years.(连词成句)
3.TOM从10岁就一直在集邮.
TON--------------stamps since he was ten years old.
答
1）如果划线的是 Three 就是 How many years
如果划线的是 Three years 就是 How long
2） I have been working in this university for 3 years.
3) Tom has been collecting stamps since he was ten years old.