Ответ:
1.We visited our grandfather a week ago. ( Мы навестили нашего дедушку неделю назад).
We didn't visit our grandfather a week ago (отрицательная форма)
Did we visit our grandfather a week ago? Yes, we did. No, we didn't.
2. He went to the funfair (Он пошёл на ярмарку)
He didn't go to the funfair
Did he go to the funfair? Yes, he did. No, he didn't
3. We saw them in the park (Мы увидели их в парке)
We didn't see them in the park.
Did we see them in the park? Yes, we did. No, we didn't/
4. She worked in the garden. ( Она работала в саду)
She didn't work in the garden.
Did she work in the garden? Yes, she did. No. she didn't.
Объяснение: