Comparative and Superlative 

Comparative:

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.

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.

INCORRECT             This house is excitinger than ever.

INCORRECT              Mike is funnier than Isaac.

CORRECT                  Mike is more funny than Isaac.

Notice the spelling change for adjectives ending in ‑y: the comparative ends in ‑ier.

INCORRECT          This book is boringer than the last one.

CORRECT                   This book is more boring than the last one.

INCORRECT              Advertising pressures women to be more thin 

CORRECT              Advertising pressures women to be thinner .

SUPERLATIVE:

Superlatives

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 illustrate the correct form:

INCORRECT            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:

INCORRECT      That is the sleepyest  puppy of the litter.
CORRECT              That is the sleepiest puppy of the litter.

HELP VIDEO

https://www.youtube.com/watch?v=wwLaiF_bVpI