Respuesta:1. The girl did not go to school by bike.2. He did not come to work by car.3. You did not eat an ice cream.4. I did not make breakfast for the family.5. We did not do everything in the correct order.6. The hat did not cost me 25€.7. John did not play football last weekend.8. We did not open the door at 5:00.9. She did not read many books at school.10. Peter did not teach yoga when he lived in the US.11. The students did not make the test in silence.12. The employees did not work last Saturday.Explicación:Las oraciones están en el tiempo Pasado Simple. La estructura positiva es: Sujeto + verbo en pasado + complementoLa estructura negativa es: Sujeto + did not (contracción: didn´t) + verbo en presente + complemento. Se usa el verbo en presente porque el auxiliar Did ya nos indica que la acción sucedió en el pasado.