Помогите поставить предложения сначала в отрицательную форму а потом в вопросительную

1) He sang

2) He saw an Ant

3) Winter came

4) I worked all summer

He did not sing-отрицательная форма Did he sing? - вопрос

He didn't see an Ant ... Did he see an Ant?

Winter did not come ... Did winter come?

I did not work all summer ... Did I work all summer?

1) He didn't sing. Did he sing?

2) He didn't see an ant. Did he see an ant?

3) Winter didn't come. Did winter come?

4) I didn't work all summer. Did you work all summer?