Question

Passar para a forma interrogativa:
We'll buy a new car.
They'll stay here.
passar para a forma negativa
I'll call you tomorrow.
You'll open the door.

Answer 1

will we buy a new car?
will they stay here?

I will not call you tomorrow
you will not open the door

Answer 2

Will we buy a new car? Will they stay here? I won't call you tomorrow. You won't open the door.