Resposta :
Resposta:
A) She isn't your sister
B) You aren't a student
C) We aren't friends
Resposta: a) She isn't your sister
b) You aren't a sudent
c) We aren't friends
Explicação: Você pode colocar o "not" depois do verbo,ex: She is not your sister, ou abreviar, com o "nt" no final ex: We aren't friends.