Adjectives having no degree
Incorrect : My work is more perfect than his.
Correct : My work is superior to his. Or My work is better than his.
Incorrect : This is the most impossible task in the world.
Correct: This task is quite impossible.
Note: There are adjectives like perfect, unique, impossible, worthless, whose meaning already contains the idea of an absolute degree. They are not usually used in comparative and superlative forms.
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