- at when we are talking about a precise time.
- in when we are talking about months , years, centuries and long periods of time.
- on when we are talking about days and exact days.
Look at these examples:
- I have a meeting at 9am.
- Lisa went home at lunchtime.
- It often snows in December.
- Do you work on Mondays?
Do the following exercise
Video explaining “in” “at” and “on”