Comparative adjectives are used to compare differences between two objects or entities. They are typically formed by adding "-er" to the end of the adjective or by preceding the adjective with "more" or "less" when the adjective has more than one syllable.

Here are some examples:

Short Adjectives (typically one syllable):

Tall → Taller

Fast → Faster

Small → Smaller

Longer Adjectives (typically two or more syllables):

 Beautiful → More beautiful

Expensive → More expensive

Comfortable → More comfortable

In some cases, irregular adjectives do not follow these rules and have unique comparative forms:

Good → Better

Bad → Worse

Far → Farther/Further

Comparative adjectives are often used with "than" to show the comparison explicitly:

She is taller than her brother.

This book is more interesting than the other one.