Is it usual?
It's unusual.
He's unfriendly.
Negative
Teacher loves them and give better grade. Is it fair?
No, it's unfair.
We get the same games console from our parents. It's fair.
Positive
He never helps!
He's unhelpful.
They're so friendly!
Positive
They do it together. They're helpful.
Positive.
She's really happy.
Positive
Her desk is tidy.
POSITIVE
His room is untidy.
NEGATIVE
Is he happy?
He's unhappy.