Common Mistakes : Chair

noun

.BAD: During the flight she sat on the chair behind me
.GOOD: During the flight she sat in the seat behind me

: seat = a place to sit, as found in a cinema, train, bus etc
.To be on the safe side, you’d better reserve a seat

: chair = a movable seat for one person
.Before the children go home, they have to put all the chairs on top of the desks