This document lists various time prepositions used to indicate when something occurs, including specific times like at 3 o'clock or at midnight, daily/weekly/monthly frequencies like every day, every Monday, once a day, as well as relative times in the future like next week, next month, next summer.

1. Time prepositions
At tree o'clock
At midnight
At the weekend
At night
In the morning
In the afternoon
In the evening
Every day
Every week
Every Monday
Once a day
Twice a week
Three times a month
Next week
Next month
Next summer