how long have you been learning english?

how long have you been learning english? learning,English,have,how,you,been,long(?)连词成句 How long have you been learning english?什么意思 How long have you been studying English? HOW long have you been studying english 怎么回答 How long have you________ English?A.been learnt B.learning C "How long have you been how long have you been studing english?为什么been后面是动词ing ,不是应该 How long have you been skating? how long have you been playing basketball ? How long have you been swimming? How long have you been ____?