how long have you 的用法

how long have you 的用法 how long have you been 用法 how long的用法 How long 的用法 how long have you done与how long have you been的区别 How long have you ___Tom? how long have you()shanghai "How long have you been How long have you lived How long have you been skating?与How long did you skate?的区别 How long have you been skating?How long did you skate?中文翻译的区 关于How long的用法