A jak to jest w kajkawskim?
„Another distinctive feature of Kajkavian is the use of another future tense. Instead of Štokavian and Čakavian future I ("ću", "ćeš", and "će" + infinitive), Kajkavian speakers use future II ("bum", "buš" and "bu" + active verbal adjective). Future II in standard Croatian can only be used in subordinate clauses to refer to a condition or an action which will be occurred before other future action. For example, the phrase "I'll show you" is "Ti bum pokazal" in Kajkavian whereas in standard Croatian it is "Pokazat ću ti". This is a feature shared with Slovene, and also the Prekmurian language, Slovenian: bom, boš, bo; Prekmurian: Bom, boš, bou.” (
Wikipedia)