'Certainly' in the Bible

And David, desiring directions from the Lord, said, Am I to go up against the Philistines? will you give them up into my hands? And the Lord said, Go up, for I will certainly give up the Philistines into your hands.

But still, because you have had no respect for the Lord, death will certainly overtake the child who has newly come to birth.

But he will certainly have taken cover now in some hole or secret place; and if some of our people, at the first attack, are overcome, then any hearing of it will say, There is destruction among the people who are on Absalom's side.

And David sent the people out, a third of them under the orders of Joab, and a third under the orders of Abishai, son of Zeruiah, Joab's brother, and a third under Ittai the Gittite. And the king said to the people, And I myself will certainly go out with you.