- set, sit
- Predominantly a transitive verb, set means "to put," "to place": "Set the box on the floor, please." Sit is predominantly an intransitive verb with a basic meaning of "to place oneself ': "When I sit down, you come and sit beside me." Set used for sit, and sit for set, in the meanings indicated, are nonstandard. Do not say "Set yourself down" or "Sit it here."Both set and sit have special meanings. The following are standard usage: "The sun sets behind that mountain every afternoon." "The house sits in a valley." "Sit the baby in the chair and then set her on her feet." The following expressions involving set and sit are hackneyed: "set one's face (or one's mind) against," "set one's heart on," "set by the ears," "set one's hand to the plow," "set the world on fire," "set one's teeth on edge," "set about," "set against," "set down," "set aside," "set forth," "set in," "set off," "set apart," "set upon," "all set," "get set," "set store by," "sit in on," "sit on," "sit out," "sit pretty," "sit tight," "sit-down strike," "sit-in," and "sitting duck."
Dictionary of problem words and expressions. Harry Shaw. 1975.