Grammatical categories
Animacy Aspect Case Clusivity Definiteness Degree of comparison Evidentiality Focus Gender Mirativity Modality Mood Noun class Number Person Polarity Tense Topic Transitivity Voice
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In English grammar the degree of comparison of an adjective or adverb describes the relational value of one thing with something in another clause of a sentence. An adjective may simply describe a quality, (the positive); it may compare the quality with that of another of its kind (comparative degree); and it may compare the quality with many or all others (superlative degree).^[1][2] In other languages it may describe a very large degree of a particular quality (in Semitic linguistics, called an elative).
The degree of comparison may be expressed morphologically, or syntactically. In English, for example, most monosyllabic and some disyllabic adjectives have morphological degrees of comparison: green (positive), greener (comparative), greenest (superlative); pretty, prettier, prettiest; while most polysyllabic adjectives use syntax: complex, more complex, most complex.

1. The positive degree is the most basic form of the adjective, positive because it does not relate to any superior or inferior qualities of other things in speech.
2. The comparative degree denotes a greater amount of a quality relative to something else. The phrase “Anna is taller than her father” means that Anna's degree of tallness is greater than her father's degree of tallness.
3. The superlative degree denotes the most, the largest, etc., by which it differs from other things.

English usage

Traditional English grammar uses the comparative form when comparing exactly two things, and the superlative when comparing three or more, but in informal usage this may not hold.

Positive	Comparative	Superlative
Good	Better	Best
Beautiful	More Beautiful	Most Beautiful
Big	Bigger	Biggest
Tall	Taller	Tallest
Sincere	More Sincere	Most Sincere
Small	Smaller	Smallest

Rhetorical use of unbalanced comparatives

In some contexts, such as advertising or political speeches, absolute and relative comparatives are intentionally employed in a way that invites a comparison, and yet the basis of comparison is not established. This is a common rhetorical device used to create an implication of significance where one may not actually be present. Although such usage is common, it is sometimes considered ungrammatical.
For example:

• Always!
• Why pay more?
• We work harder.
• We sell for less!