Sampai = up to/until

sampai (ka-)PLACE, sampai (ka-)TIME   =  verbs +prepositions

 1) The ka- seems to be omitted occasionally with place, omitted most times with the time phrase following. Sampai itself is prepositional in function, in sentences with another main verb.

Sampai as a "place" preposition: 

 Di-place A sampai (ka-)place B = From place A up to place B

Berjalan gi sampai (ka-) Pattani. Di-Pattani sampai ka-Yala.

          Travel up to Pattani/as far as Pattani.   From Pattani to Yala.

 Sampai as a "time" preposition

From time A up to time B = time A sampai (ka-)time B

 *note there is no di- before time A*

          Buat ker’ja sampai pukul lima petang. Pagi sampai malam.

          Work up to/ until five pm.              From morning until night.

From place/time A up to place/time B = di-place A sampai (ka-)place B

                                                     time A        sampai (ka-)time B

Preposition ‘from’ = di-place (typical P.M.) = same as “at place”.

                            dari-place (typical S.M.    and used by some P.M. speakers too)