Touching the place→On the table.
Time expressing words→On Wednesday.
Before articles followed by mode of
transaction→She was on a bicycle.
Before possessive
adjectives→Zigna
go to school on his bicycle.
Foot or some animals’s back→He is walking on foot.
Sara is riding on a camel’s back.
Directions→On him.
Before some words→On television, on a diet,
On demand.