I agree
I disagree
That goal was believable
That goal was unbelievable
He is very tidy
He is very untidy
He is loyal
He is disloyal
She is very friendly
She is very unfriendly
She is very sociable
She is very unsociable
On Christmas day we will wrap the presents
On Christmas day we unwrap the presents
When the parents are not at home, the children behave
When the parents are not at home, the children misbehave
He is very decisive
He is very indecisive
She is very dependent
She is very independent
He is very patient
He is very impatient
This is legal
This is illegal
He is sane
He is insane
He was very respectful
He was very disrespectful
My parents approve of him
My parents disapprove of him
This is healthy food
This is unhealthy food
She is very responsible
She is very irresponsible
The chair is very comfortable
The chair is very uncomfortable
The internet is available
The internet is unavailable
He is mortal
He is immortal