"... có + ... + không?" is a construction used to express a question with a yes/no answer. However, often it's okay to just leave the "có" out :)
How does the "có" fit into this sentence? My understanding is that có is used in a similar way as 'to be'.
My best guess is that this sentence can be understood as 'do you have knowledge of how to communicate? '
Where is the 'how'??? I miss the 'thế nào'... :(
literally: you ? know to communicate, not?
ban co ...nhu the nao khong?