Cоставить два предложения в Past Simple,два отрицательных в Past Simple и два вопросительных в Past Simple

He wrote  a letter to his friend.He did not write  a letter to  his friend.Did he  write  a letter to his friend?

We built a big house in the  forest near the river.We did not build a big house in the  forest  near the river.Did we build a big house in the  forest  near the river?