preposition:used to indicate a point or place where something is located or occurs
We will meet at the restaurant at 8 PM.
preposition:used to indicate a specific point in time
The movie starts at midnight.
preposition:used to indicate the object or target of an action
She smiled at me from across the room.
preposition:used to indicate a state, condition, or activity
The two countries are at war.
preposition:used to indicate a rate, value, or age
The car was traveling at high speed.
