Elegir un tiempo = decidir presente o pasado + aspecto (simple, continuous, perfect, perfect continuous).
Presente
- Present simple: hábitos y verdades → She works in a bank.
- Present continuous: ahora o temporal → She’s working from home this week.
- Present perfect: experiencia, resultado → She has worked abroad.
- Present perfect continuous: duración hasta ahora → She’s been working since 8.
Pasado
- Past simple: hecho terminado con fecha → They left in 2020.
- Past continuous: acción en curso / escenario → They were sleeping.
- Past perfect: anterior a otra acción pasada → They had left.
- Past perfect continuous: duración hasta un momento pasado → They had been arguing.
Errores frecuentes
- «I have seen him yesterday» ✗ → I saw him yesterday.
- «I live here since 2020» ✗ → I’ve lived here since 2020.
- «I’m knowing / I’m wanting» ✗ → I know / I want.
- No olvides el past perfect cuando una acción es anterior a otra pasada.