Пять типов вопросов и отрицание.
1) Children washed up yesterday
2) He was happy last week
3)Girls could sing five days ago
4)Boys fought during last break

1) Children didn't wash up yesterday
Did children wash up yesterday?
What did children do yesterday?
Who washed up yesterday?
Did children wash up yesterday or last week?
Children washed up yesterday,didn't they?
2) He wasn't happy last week
Was he happy last week?
When was he happy?
Who was happy last week?
Was he happy or sad last week?
He was happy last week,wasn't he?
3)Girls couldn't sing five days ago
Could girls sing five days ago?
When could girls sing?
Who could sing five days ago?
Could girls sing or dance five days ago?
Girls could sing five days ago,couldn't they?
4)Boys didn't fight during last break
Did boys fight during last break?
When did boys fight?
Who fought last break?
Did boys fight during or after last break?
Boys fought during last break,didn't they?