They built a house yesterday. they will build a house tomorrow. написать отрицательное и вопросительное должно получится 4 предложения

Did they build a house yesterday?
They did'n build a house yesterday.
Will they build a house tomorrow?
They will not build a house tomorrow.

1) They didn't build a house yesterday.
     Did they build a house yesterday?
2) They will not (или won't) build a house tomorrow.
     Will they build a house tomorrow?