'Do You Not Know' in the Bible

Or do you not know that as many as were baptized into Christ Jesus were baptized into his death?

Do you not know that to whomever you present yourselves [as] slaves for obedience, you are slaves to whomever you obey, whether sin, [leading] to death, or obedience, [leading] to righteousness?

Or do you not know, brothers (for I am speaking to those who know the law), that the law is master of a person for as long a time [as] he lives?

God has not rejected his people, whom he foreknew! Or do you not know, in [the passage about] Elijah, what the scripture says--how he appeals to God against Israel?