Use 'set' to express the placement of an object on a surface.
I set the plates down on the table.
She set the books on chest of drawers.
Important Note: 'Set' is often used to refer to placing plates, glasses and other utensils on the table.
Verb Forms: Set - Set - Set - Setting
Use 'sit' when referring to the subject which moves from a standing to a sitting position.
Can I sit down?
Please sit on this chair.
Important Note:'Sit' is often used with the preposition 'down'.
Verb Forms: Sit - Sat - Sat - Sitting
