Respuesta:
I am not late.
Tifany and Uma aren't my friends
He isn't cool.
My mother and father aren't cooking dinner.
She isn't pretty.
The test isn't very difficult.
The hammer isn't new.
Ricardo, John and I aren't watching a movie.
Explicación:
Estructura negativa de oraciones negativas con el Verbo To Be
Sujeto + Verbo to be negativo + Complemento.
