Writing Style

Comparatives, equatives, and superlatives are adverb forms that are used to show change or make comparisons. They show the degree or amount of similarity or difference.
Fatima studied harder than Maryam. (compartive)
Fatima studied as hard as Maryam. (equative)
Fatima studied the hardest. (superlative)

Comparatives

Comparative adverbs are used to show change or make comparisons.
The form of comparative adverbs depends on the number of syllables in the adverb.
1. Adverbs with one syllable = add “-er”
Fadi’s wound healed faster than Omar’s. 
2.  Adverbs with two or more syllables = add “more” or “less” before the adverb
Fadi’s wound healed more quickly than Omar’s.

Equatives

​Equatives and non-equatives are used to show equality or inequality.
Equatives have the following form: as + adverb + as
Sarah acted as kindly as Rana toward all of her patients.
Non-equatives have following form: not + as + adverb + as
Sarah acted not as kindly as Rana toward all of her patients.

Superlatives

Superlatives are used to make comparisons. 
Superlatives show which one is the most or least of an adverb.
Superlatives usually include the article “the” because there is only one superlative.

Sarah studied the most for the final anatomy exam.
Mohamoud was the least seriously hurt.

More Information

“Comparative and Superlative Adverbs,” The British Council
“Comparative Adverbs,” EnglishCLUB