ICAO Structure: Adjectives – Basic Structures

ICAO Structure: Adjectives – Basic Structures

What Are Adjectives?

Adjectives are one of the biggest parts of the speech together with verbs, nouns, and adverbs. The easiest adjectives most English students are familiar with even at the beginning of their language acquisition are: big, small, fast, slow, loud, quiet, nice, rich, poor, tall, etc. Adjectives always describe a noun and, therefore, they provide with some extra information.

Here’s a simple sentence without an adjective:

John is a boy.

Here’s some extra information added with an adjective:

John is a clever boy.

(Adjective “clever” describes a noun “boy” and, as a result we know more about John in the second sentence.)

Adjectives comparatives and superlatives

How To Identify Adjectives? Adjectives Forming Suffixes

The only best way to check whether a given part of the speech is an adjective or not is to check its role in a sentence. On the other hand, there is a list of adjectives that can be easily recognized depending on a suffix (ending) of a certain word. Take a closer look at a list (copyrights to Cambridge Online Dictionary):

Adjectives suffixes

Adjectives can be made from nouns and verbs if you add a correct suffix.

A noun can be transformed into an adjective:

wind (noun) -> windy (adjective)

beauty (noun) -> beautiful (adjective)

A verb can be also transformed into an adjective:

drink (verb) -> drinkable (adjective)

eat (verb) -> edible (adjective)

One-syllable adjectives and two-syllable adjectives

What Are Comparative and Superlative?

If we want to compare two or more things we may use comparative or superlative adjectives. In general,  one-syllable adjectives take –er suffix comparative and –est suffix for superlatives.

One-Syllable Adjectives

Tall (base form, one-syllable adjective) -> taller (comparative) -> the tallest (superlative)

With one-syllable adjectives ending in vowel + consonant, you need to double the final consonant before –er/–est.

Big (base form, one-syllable adjective ending with vowel + consonant) -> bigger -> the biggest (‘g’ is doubbled in comparative and superlative)

With adjectives ending in y, you replace the ‘y’ with ‘i’ and add  –er/ –est.

Lucky (base form, ending with ‘y’) -> luckier (comparative) -> the luckiest (superlative)

Two-Syllable Adjectives

Also, two-syllable adjectives which end in an unstressed syllable also have –er/ –est suffixes:

funny -> funnier -> the funniest

If an adjective doesn’t have an unstressed syllable or is longer than two syllables, it is built with a certain pattern: comparatives + more, superlatives + the most.

interesting -> more interesting (comparative)  -> the most interesting (superlative)

What Are Absolute Adjectives?

Absolute adjectives don’t take either comparative or superlative form. Look at the example below:

“He’s dead.” -> in comparative and superlative we will also say “dead”; there are no such forms as “more/ most dead” or “deader/ deadest.”

What are the Irregular Comparatives and Superlatives?

Here’s the list of the most popular irregular comparatives and superlatives.

Adjectives comparatives and superlatives


This blog post purposefully contains the most basic information about adjectives in the English language. My other articles will include more the description of some complex structures. Is there anything that I should explain to you in detail? Let me know via email and I’ll take every suggestion into consideration 🙂

Emilia Barska
About me

General English teacher and Aviation English specialist. Devoting her free time to sharing her expert knowledge how to pass an ICAO exam with flying colors. She enjoys reading crime stories, listening to heavy metal music and sipping a vanilla latte.