how do we make comparisons with three syllable adjectives?

If you are comparing one thing to many others, you might want to use a superlative adjective.
I am comparing the speed of a train and a car. Notice ‘than’ after the comparative adjective ‘faster’.

Forming comparatives and superlatives is easy. The form depends on the number of syllables in the original adjective.
Adjectives with three or more syllables form the comparative by putting more in front of the adjective, and the superlative by putting most in front.

“He’s far taller than her.” (NOT “He’s far more taller…”)
“I’m much lazier than you!”
1. Comparing two things

how do we make comparisons with three syllable adjectives?, Language Skills Abroad
clev er – clever er – clever est ;
friendl y —friendli er – friendli est (note: y changes to i );
prett y – pretti er – pretti est ;
narr ow – narrow er – narrow est
simp le – simp ler – simpl est


2) adjectives with two syllables ending in –y, -er, -le, -ow:

Here are some rules and examples of how to form the comparatives and superlatives:
To form comparative sentences, use the comparative with the word than. Here are some examples:

Adjectives make their comparative and superlative forms in different ways, depending on the base adjective itself. Here’s a quick-reference guide to the spelling of comparative and superlative adjectives:
If the adjective has three syllables or more, then the words ‘more’ and ‘most’ are used:

how do we make comparisons with three syllable adjectives?, Language Skills Abroad
good → better
well (healthy) → better
bad → worse
far → farther/further
Look at these examples:

An adjective or adverb is used to show that two things share a quality in the same amount. A quality shared in the same amount means that the two things are equal is some way. The form used to make this kind of comparison is as adjective / adverb as. The as as comparison is better known as a correlative conjunction.
His computer can download files as fast as their computer does.

how do we make comparisons with three syllable adjectives?, Language Skills Abroad
Yes : The right words to use are more foolish / more useful
Not all adjectives can end with -er . For some adjectives, we use the word more in front of them (careful – more careful; tired – more tired). When using the word more , we also use the word than to follow the c careful; tir

Level: beginner

It was the happiest day of my life.
Everest is the highest mountain in the world.
That’s the best film I have seen this year.
I have three sisters: Jan is the oldest and Angela is the youngest.

Resources:

http://www.ef.com/ca/english-resources/english-grammar/comparative-and-superlative/
http://www.english-at-home.com/amp/grammar/comparisons//
http://greenforest.com.ua/journal/read/the-comparison-of-adjectives
http://academicguides.waldenu.edu/writingcenter/grammar/comparisons
http://www.lexico.com/grammar/forming-comparative-and-superlative-adjectives
http://www.englishclub.com/grammar/adjectives-comparative.htm
http://www.testden.com/toeic/grammar-comparative-superlative.htm
http://myenglishgrammar.com/lesson-3-adjectives/2-comparative-adjectives.html
http://learnenglish.britishcouncil.org/english-grammar-reference/comparative-and-superlative-adjectives
http://m.youtube.com/watch?v=H7kFzg9xpOU