'Certainly' in the Bible

{I have certainly seen} the mistreatment of my people [who are] in Egypt and have heard their groaning, and I have come down to deliver them. And now come, I will send you to Egypt.'

But Peter said, "Certainly not, Lord! For I have never eaten anything common and unclean!"

But I said, 'Certainly not, Lord! For nothing common or unclean has ever entered into my mouth!'

But Paul said to them, "They beat us in public without due process--men who are Roman citizens--[and] threw [us] into prison, and now they are wanting to release us secretly? Certainly not! Rather let them come themselves [and] bring us out!"