(-) The pencil and the eraser ________ blue.
The pencil and the eraser aren't blue.
(-) I__________ sad.
I'm not sad.
(-) We________ friends.
We're not friends.
(-) The pencil _____ big.
The pencil isn't big.
(+) You____________good students.
You're good students.
(+) We _________ classmates.
We're classmates.
(+) They ______ classmates.
They're classmates.
(+) Mario and I _______ friends.
Mario and I are friends.
(-) The notebooks _______cool.
The notebooks are cool.
(-) Juan and Roberto ________ happy.
Juan and Roberto aren't happy.
(+) Maria__________a student.
Maria is a student.
(-) He_________ Batman.
(-) He's not Batman.