Most comparatives will be preceded by the word "more" or will take -r or -er as a suffix. If the adjective is a short word like "rich", it will take a suffix, as in "richer." If the adjective is a long word like "beautiful", it will be preceded by "more" as in "more beautiful." Most comparative adjectives will be followed by the word "than" followed by the thing compared, such as A is more beautiful than B. The word "more" and the suffix -er should not be used together to define the same noun; it would be wrong to say A is more richer than B.
When the adjective is a two-syllable word that ends with the letter y, such as"happy," the y is dropped and the adjective takes the suffix -ier, as in "happier."
There are a few adjectives that take a different form in the comparative degree.
These are:
Good-better; bad-worse; little-less; some-much-many more.
Some adjectives express a superlative. That means there cannot be two of the thing they define. It would not make sense to use these adjectives in the comparative degree. This list includes adjectives such as unique, complete, absolute, impossible.