How long have you been for china与How long have you been in c

How long have you been for china与How long have you been in c How long have you been in China? How long have you been in China "How long have you been how long have you been in与how long have been to的区别,还有how lon How long have you been living in China?为什么要用been,living是延续性动 How long have you been a m___ of Greener China? how long have you been in china中为什么要用have呢? How long have you been skating? how long have you been playing basketball ? How long have you been swimming? How long have you been ____?