Superlative adjectives are used to compare more than two
things.  They are like comparative adjectives, but they are
used differently.

Superlative adjective compare a group of things.  They show
one item from a group a different from the rest.  For example:

  • Kevin is the oldest person in the class.

This class has 30 people.  Kevin is the oldest, which means
every person is younger than him.  This makes him different
than the group.  

STRUCTURE

Superlative adjectives follow a similar structure to
comparative adjectives.  They use EST and THE MOST.

EST
Subject   +  BE  +  The  +  Adjective   +  EST

Examples:
  • I am the oldest person in my class.
  • My brother is the youngest person in his class.

THE MOST
Subject   +  BE  +  The  +  Most  +  Adjective

Examples:    
  • This is the most expensive jacket in the store.
  • She is the most beautiful woman I know.


Here is the chart to show you when to use EST and when to
use MOST with superlative adjectives.
Base
Adjective
 Add...
 Example
  
3 Syllables
or more
 the most
 beautiful
 the most
beautiful
2 Syllables
or less
 est
 tall
 the tallest

Superlative Adjectives

Business English