'Do You Not Know' in the Bible

Do you not know that all of us who have been baptized into union with Christ Jesus have been baptized into his death?

Do you not know that when you submit to being someone's slaves, and obeying him, you are the slaves of the one whom you obey, whether your slavery is to sin, and leads to death, or is to obedience, and leads to uprightness?

Do you not know, brothers??or I am speaking to men who know what law is??hat law governs a man only as long as he lives?

God has not repudiated his people, which he had marked out from the first. Do you not know what the Scripture says in speaking of Elijah, how he appealed to God against Israel?