COMPARATIVE ADJECTIVES
A comparative adjective is used to compare two things.
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 people make is using incorrectly formed comparative adjectives. See the sentences below for an example:
WRONG: His cat is more large than my dog.
CORRECT: His cat is larger than my dog.
So what makes the first example wrong and the second right? There are a few rules that explain this:
For adjectives that are just one syllable, add -er to the end (this explains the above example).
For two-syllable adjectives not ending in -y and for all three-or-more-syllable adjectives, use the form “more + adjective.”
For two-syllable adjectives ending in -y, change the -y to -i and add -er.
These simple rules make it easy to tell when you should add -er or -ier and when you should use “more + adjective.”
Here are a few more examples:
CORRECT: This house is more exciting than ever.
WRONG: This house is excitinger than ever.
CORRECT: Mike is funnier than Isaac.
WRONG: Mike is more funny than Isaac.
SUPERLATIVE ADJECTIVES
A superlative adjective is used when you compare three or more things.
When comparing more than two things, you’ll likely use words and phrases like smallest, biggest, tallest, most interesting, and least interesting. Notice the ‑est ending and the words most and least. Make sure you use the proper ending or superlative adjective when forming these superlatives. The examples below show the correct form:
WRONG: Martha is the elder of the four sisters.
If there were only two sisters, we could use the comparative elder here. Because there are four sisters, we need a superlative.
CORRECT: Martha is the eldest of the four sisters.
Here are a couple of other examples:
CORRECT: I think his last book is his least interesting; his third book was the most interesting.
CORRECT: That must be the weirdest play ever written.
Remember that adjectives ending in ‑y change their spelling when ‑est is added. To form these superlatives, change the y to an i before adding the -est ending, as illustrated below:
WRONG: That is the sleepyest puppy of the litter.
CORRECT: That is the sleepiest puppy of the litter.
Notice the spelling change for adjectives ending in ‑y: the comparative ends in ‑ier.
WRONG: This book is boringer than the last one.
CORRECT: This book is more boring than the last one.
WRONG: Advertising pressures women to be more thin.
CORRECT: Advertising pressures women to be thinner.