'Do You Not Know' in the Bible

Then three thousand men from Judah went down to the cleft of the rock of Etam, and they said to Samson, "Do you not know that the Philistines [are] ruling over us? What [is] this [that] you have done to us?" And he said to them, "Just as they did to me, so I have done to them."

Then Abner called to Joab and said, "Will [the] sword devour forever? Do you not know that [there] will be bitterness in the end? {How long} will you not tell the people to turn {away from pursuing} their brothers?"

Do you not know what I have done, I and my ancestors, to all the peoples of the lands? Were the gods of the nations of all the lands at all able to save their land from my hand?

"Say now to the rebellious house of Israel, 'Do you not know what these [are]?' Say, 'Look! The king of Babylon will come [to] Jerusalem, and he will take its king and its officials, and he will bring them to himself, [to] Babylon.

And the angel [who was] talking with me answered and said to me, "Do you not know what these [are]?" And I said, "No, my lord."

And he replied to me, "Do you not know what these [are]?" And I said, "No, my lord."