Mary: What are you gonna do today?
Nack: I'm gonna practice the guitar this afternoon.
Mary: Oh, can you play the guitar?
Nack: Yes, I can.
Mary: How long have you been playing the guitar?
Nack: About 20 years long.
Mary: Wow. I wanna listen to your guitar play.
Nack: Thanks. I'll listen to you some day.
I'll play the guitar for you some day.
Mary: I'm looking forward to it.