Решение:
Чтобы сделать предложение отрицательным в Past Simple, нужно использовать вспомогательный глагол did not (didn't) и поставить основной глагол в инфинитив (начальную форму, без -ed).
Исходные предложения:
- Yesterday I went to school.
- Last week I played tennis.
- Yesterday my sister also went to school.
- Last month she danced in the club.
- Last year my father worked at hospital.
- Two days ago my mother prepared tasty dishes.
- Two days ago my father repaired the car.
- Yesterday I helped my mother.
- My friends swam in the river last summer.
- Yesterday my grandparents watched TV.
Отрицательные формы:
- 1. Yesterday I didn't go to school.
- 2. Last week I didn't play tennis.
- 3. Yesterday my sister also didn't go to school.
- 4. Last month she didn't dance in the club.
- 5. Last year my father didn't work at hospital.
- 6. Two days ago my mother didn't prepare tasty dishes.
- 7. Two days ago my father didn't repair the car.
- 8. Yesterday I didn't help my mother.
- 9. My friends didn't swim in the river last summer.
- 10. Yesterday my grandparents didn't watch TV.
Ответ: didn't go, didn't play, didn't go, didn't dance, didn't work, didn't prepare, didn't repair, didn't help, didn't swim, didn't watch.