'Do You Not Know' in the Bible

And do you not know that all of us who have been baptized into Christ Jesus were baptized into His death?

Do you not know that if you surrender yourselves as bondservants to obey any one, you become the bondservants of him whom you obey, whether the bondservants of Sin (with death as the result)

Brethren, do you not know--for I am writing to people acquainted with the Law--that it is during our lifetime that we are subject to the Law?