I ____ (listen) to the same music since ____.
've been listening / I was a teenager
I ____ (sit) in this chair since ____ .
've sat / 2010
I ____ (study) English since ____.
've been studying / first grade (for example)
I ____ (go) to the same hairdresser’s for _____ .
've been going / five years
I ____ (have) the same computer for ____ .
've had / years, months etc.
I ___ (know) my oldest friend since ___ .
've known / first grade (for ex.)