1. In, on and at are used to talk about place:
We use in with unclosed spaces (room, buildings), and with limited areas ( town, parks, countries, continents)
Example: in my pocket, in her car, in Germany
We use on with surface (walls, floors, shelves) and lines (paths, coasts, the equator)
Example: on the grass, on the sea, on the line
We use at with a point (at the bus stop), and with a building, when we mean either inside or outside:
A: Let’s meet at the cinema.
B: OK. Shall we meet in the cinema itself or on the pavement outside?
Here are other examples of the prepositions of place:
I sat between Jane and Pam on the plane.
Ann was sitting in front of me, and Carol was behind me.
Jane talks to the man next to her.
Buda lies opposite Pest; together they are the city of Budapest.
We sat down to rest under a large tree.
Please leave the flowers outside my room. (= not in my room)
2. Into, onto, and to are used to talk about movement:
We moved the chairs into my bedroom.
The actor ran onto the stage.
They walked to the next town.
The opposites are out of, off and from:
We moved the chairs out of my bedroom.
The actor ran off the stage.
We drove from London to Edinburgh.
Here are other examples of the prepositions of movement:
They ran across the field to the road.
Jim cycled along the road to the next town.
I walked up the hill and ran down the other side.
The bus went past the bus stop without sopping.
The train goes through three tunnels.
3. In, on and at are used to talk about time.
We use in with years, seasons and months:
Examople: in 1987, in the spring, in May
Notice also: in the morning, in the afternoon, in the evening.
We use on with days and dates:
on Friday, on Christmas Day, on 30th May
We use at for times:
at 5 o’clock, at lunch-time
ប្រភព៖ Grammar Spectrum 3