Preposições de Tempo: at, in, on
Usamos:
- at para tempo PRECISO
- in para MESES, ANOS, SÉCULOS e PERíODOS LONGOS
- on para DIAS e DATAS
| at | in | on |
| Tempo Preciso | Meses, Anos, Séculos e Períodos Longos | Dias e Datas |
| at 5 o’clock | in September | on Saturday |
| at 7.30am | in summer | on Mondays |
| at noon | in the summer | on May 13th |
| at dinnertime | in 1980 | on 25 Dec. 2010 |
| at bedtime | in the 1980s | on Christmas Day |
| at sunrise | in the next century | on Independence Day |
| at sunset | in the Ice Age | on my birthday |
| at the moment | in the past/future | on New Year’s Eve |
Look at these examples:
- I wake up at 7 o’clock.
- My dad goes home at lunchtime.
- She travels in June.
- Do you work on Sundays?
- My birthday is on February 27th.
- Will you be here on Christmas Day?
As expressões abaixo sempre são usadas com at:
| Expressão | Exemplos |
| at night | She comes home at night. |
| at the weekend | We always go to the beach at the weekend. |
| at Christmas/Easter | I stay with my family at Christmas. |
| at the same time | We did our homework at the same time. |
| at present | He’s not here at present. |
ATENÇÃO!
| in | on |
| in the morning | on Thursday morning |
| in the mornings | on Wednesday mornings |
| in the afternoon(s) | on Sunday afternoons |
| in the evening(s) | on Monday evening |
Não usamos at, in, on quando houver last, next, every, this:
- I went to Salvador last December. (não in last December)
- They’re taking the test next Tuesday. (não on next Tuesday)
- We go home every Easter. (não at every Easter)
- He’ll see the doctor this afternoon. (não in this afternoon)
