Resposta:
a) Negativa: Mr.Brown is not going to sell his house.
Interrogativa: Is Mr.Brown going to sell his house?
b) Negativa: I am not going to move to another town.
Interrogativa: Am i going to move to another town?
c) Negativa: You are not going to help me
Interrogativa: Are you going to help me?
d) Negativa: I am not going to help me
Interrogativa: Am i going to help me?
Explicação:
Espero ter ajudado....
Bons Estudos!!! =)