grammar rules for comparatives and superlativesGrammarly
Adjectives can compare two things or more than two things. When we make these comparisons, we use comparative and superlative forms of adjectives.
One way to describe nouns (people, objects, animals, etc.) is by comparing them to something else. When comparing two things, you’re likely to use adjectives like smaller, bigger, taller, more interesting, and less expensive. Notice the er ending, and the words more and less. A mistake that both native speakers and non-native speakers make is using incorrectly formed comparative adjectives. See the sentences below for an illustration of this common error: