Resposta :
A) WE ARE AT SCHOOL
N we are not at school
I Are you at school?
B) BOYS ARE BAD
N the boys are not bad
I boys are bad?
C) LIFE IS WONDERFUL
N Life is not wonderful
I life wonderful?
D) MY SISTER IS HIGH
N my sister is not tall
I her sister tall?
Resposta:
a) n: We aren't at school
i: are we at school?
b) n: The boys aren't bad
i: are the boys bad?
c) n: the life isn't wonderful
i: is the life woderful?
d) n: my sister isn't tall
I: is my sister tall?
Explicação:
na negativa você precisa achar o verbo complementar e adicionar o 't (nem sempre é só isso) e na interrogativa vc precisa colocar o verbo complementar na frente da frase