Nós usamos:
- AT for a PRECISE TIME (para tempos precisos)
- IN for MONTHS, YEARS, CENTURIES and LONG PERIODS (para meses, anos, séculos e períodos longos)
- ON for DAYS and DATES (para dias da semana e datas)
Look at these examples:
- I have a meeting at 9am.
- The shop closes at midnight.
- Jane went home at lunchtime.
- In England, it often snows in December.
- Do you think we will go to Jupiter in the future?
- There should be a lot of progress in the next century.
- Do you work on Mondays?
- Her birthday is on 20 November.
- Where will you be on New Year's Day?