no drinking, fencing, swearing, quarreling, or drabbing
your son has gone mad
we are aware
i already know my parents have sent you to spy on me
Polonius sends out Reynaldo to spy on his son Laerates with a specific list of instructions that he told his son not to do before he left.
Ophelia has told her father that hamlet has gone mad and Plonius thinks he may know why but he goes to the king and queen to let them know about there son
since Polonius has told Hamlets parents about his madness the king and queen send out a spy to check on hamlet and figure out what has him going crazy but hamlet already knows what his parents are up to