did / didn’t para preguntas y negativas en pasado; el verbo va en forma base.
Formas
- I didn’t go · she didn’t eat
- Did you go…? – Yes, I did. / No, I didn’t.
- Where / What / When / Who did you…?
Excepción: be
- Were you…? · I wasn’t… (sin did)
Errores frecuentes
- «didn’t went» ✗ → didn’t go
- «Did you saw…?» ✗ → Did you see…?
- «Did you tired?» ✗ → Were you tired?
