Спредложениями в past simple , их нужно сделать +, ? , -. we (read a book ) yesterday. she ( help my brother) 3 days ago/ he (draw a picture) last month. they(write a letter) last week.

1.We read a book yesterday. 
We did not read a book yesterday
Did we read a book yesterday?
2.She helped my brother 3 days ago
She did not help my brother 3 days ago 
Did she help my brother 3 days ago?
3.He drew a picture las month.
He did not draw a picture last month
Did he draw a picture last month?
4. They wrote a letter last week
They did not write a letter last week
Did they write a letter last week?