To make someone conceited.
To not make someone conceited.
The problem became really bad!
The problem didn`t become bad!
You pay an attention.
You don't pay any attention.
You are not in love with each other.
You are in love with each other very much.
You can stay calm at times of pressure and stress.
You can`t stay calm at times of pressure and stress.
I could understand the lecture.
I couldn't understand anything of the lecture.