Preposiciones de tiempo: in / on / at
Regla A1: in = meses/años/periodos · on = días/fechas · at = horas/expresiones fijas.
1) Regla rápida
in + months/years/seasons/parts of day on + days/dates at + clock times/special phrases
- in May · in 2025 · in summer · in the morning
- on Monday · on July 5th · on Monday morning
- at 7 o’clock · at noon · at night · at the weekend (BrE)
Festividades: at Christmas/Easter (periodo) · on Christmas Day (día concreto).
2) Tabla de usos
| Preposición | Usos (A1) | Ejemplos |
|---|---|---|
| in | Meses, años, estaciones, partes del día* | in June · in 2024 · in winter · in the afternoon |
| on | Días de la semana, fechas, “X day” | on Friday · on 1st May · on my birthday · on Sunday evening |
| at | Horas y expresiones fijas | at 6:30 · at night · at noon · at midnight · at the weekend (BrE) |
*Excepción: se dice at night, no *in the night (A1).
3) Frases útiles
- in the morning / afternoon / evening · at night
- on Monday morning / on Friday night
- at the weekend (BrE) / on the weekend (AmE)
- at Christmas / on Christmas Day
- in January · in 2023 · in spring
Variación BrE/AmE: BrE: at the weekend. AmE: on the weekend. Usa la que prefieras, sé consistente.
4) Errores comunes
| Incorrecto | Correcto | Por qué |
|---|---|---|
| *in Monday* | on Monday | Días → on |
| *on 7:00* | at 7:00 | Horas → at |
| *at June* | in June | Meses → in |
| *on the morning* | in the morning | Partes del día → in (excepto at night) |
| *in Christmas Day* | on Christmas Day | Día concreto → on |
5) Mini-práctica
- Elige la preposición correcta:
She works ___ Mondays. — The class is ___ 8 pm. — My exam is ___ June. - Completa:
I usually study ___ the evening, but ___ night I sleep early. - Fechas:
We meet ___ May 2nd, ___ 10:30. - Festividades:
I travel ___ the weekend and visit my family ___ Christmas Day. - Corrige:
*They play football in Sunday morning* → ____________________________
Respuestas ejemplo: on · at · in · in / at · on May 2nd, at 10:30 · at the weekend / on Christmas Day · They play football on Sunday morning.
6) Próximo paso
Sigue con la hora y el calendario (fechas) para decir y preguntar la hora, y escribir fechas correctamente.