> la djan. klama la glazgov. pu la maris.
> John goes/went/will-go to Glasgow in the past of Mary.
> John went to Glasgow before Mary.
This means John went to Glasgow before Mary existed (was born I suppose). I
think you mean to say:
la djan. klama la glazgov. pu tu'ala matis.
co'omi'e dn.