Составить 3 вопроса и отрицания к предложениям: 1) my sister was in the park. 2) they weren't at home yesterday. 3) i was at school.

1) Does my sister was in the park?
My sister does was in the park.
2) Do they weren't at home yesterday?
they do weren't at home yesterday.
3)Do I was at school?
I do was at school.
(я тебе мне)