Mesi anpil for the if-then responses! What about "if-then (maybe): "Si ou pale, petet yap vini?" Or is there an "uncertainty" tense?

Thanks,  You got it right.

Si ou wap pale, petèt yap vini.
If you'll speak, maybe they'll come.

Si ou mande yo, petèt yap vini.
If you ask them, maybe they'll come.

Si ou fè moun de byen, petèt ma gen yon sipriz pou ou.
If you behave, maybe I'd have a surprise for you.

Si ou etidye, petèt wa pase
If you study, maybe you'd pass.
Ask me anything