Unit6How long have you been co

"How long have you been How long have you been skating? you have been in Neijiang very long? how long have you been playing basketball ? How long have you been swimming? Have you been making films for long How long have you been ____? 1.How long have you been here? how long have you been ---work? “How long have you been watching I have been love you to long how long have you been 用法