Question

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

Answer 1

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.

Answer 2

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?