Be sure (to do s.t.), certainly, really.
It conveys an aspect of certainty of as yet unaccomplished actions. Often it is best not translated into English.
Be sure to follow tomorrow.
We certainly will talk afterwards. I am just about to say the prayers first.
I certainly will make it.
Ine sa' si akuhin bang eddo'nu kēmon?
What will there be for me if you take it all?
There is really little fish.