Adjective

An adjective is a word which modifies a noun.

There are two types of adjectives:
• Gradable Adjectives
• Non-Gradable Adjectives

Gradable adjectives have comparative and superlative forms; for example: tall, young, long, fat, thin, expensive, beautiful,...
Non-gradable adjectives don't have comparative and superlative forms; for example: dead, medical, daily, monthly, perfect, excellent,...

Equative Adjectives:

as + adjective + as
so + adjective + as (British)

Examples:
My brother is as tall as me.
My brother is as tall as I am.
Jack is as careful as Tom (is).

Fixed Expressions with "as ........ as":

as white as snow → Her face was as white as snow.
as strong as an ox → The wrestler is as strong as an ox.
as blind as a bat → This dog is as blind as a bat. It can’t see anything.
as good as gold → His performance was as good as gold.
as cool as a cucumber → Jack felt calm. He was as cool as a cucumber.
as light as air → My pillow is as light as air.
as light as a feather → This microchip is as light as a feather.
as old as hills → Sally’s grandpa is as old as hills. He can remember the Victorian age!
as pretty as a picture → Her face is as pretty as a picture.
as sweet as honey → This food is as sweet as honey.
as dry as bone → His mouth was as dry as bone.
as quiet as a mouse → Joe never says anything. He is as quiet as a mouse.
as gentle as a lamb → This cute baby is as gentle as a lamb.
as tough as nails → His bulging muscles are as tough as nails.
as hungry as a bear → Please serve the dinner right away. I’m as hungry as a bear.
as cold as ice → I wasn’t wearing my gloves. Now, my hands are as cold as ice.
..........................

Comparative Adjectives:

Short Adjective + -er
more/less + Long Adjective

Examples:
A BMW is cheaper than a Porsche.
A Porsche is more expensive than a BMW.
A BMW is less expensive than a Porsche.

Double Comparatives:

Double comparatives show a gradual change.
Examples:
Richard is growing taller and taller.
The world is getting smarter and smarter.
The flower is becoming more and more beautiful.
The TV series are becoming less and less exciting.

Parallel Comparatives:

Examples:
The more intelligent a student (is), the higher his grades (are).
The higher the GDP of a country (is), the wealthier its people (are).
The more, the merrier.
-‘How do you like your coffee?’ - ‘The stronger, the better.’

Superlative Adjectives:

the + Short Adjective + -est
the + most/least + Long Adjective

Examples:
Renault is the cheapest car in Europe.
Lamborghini is the most expensive car in Europe.
Renault is the least expensive car in Europe.

Irregular Comparative and Superlative Adjectives:

good → better → the best
bad → worse → the worst
far → farther → the farthest

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