Prepositions

For postpositions and circumpostions see Postpositions Prepositions describes time unlike past present and future it describes place.

Example At the beach. I went swimming.

At is the preposition since it's describing where they are.

Example On the day it's raining. We went upstairs to draw butterflies.

On is the preposition since it's describing the day it's raining.

Example in Math class. I was having a hard time with Linear eqations.

prepositions are on,at,about,in, and to.