COMPARATIVE FORM

Johnny is stronger than Jack.

fast - faster

hot - hotter

easy - easier 

modern - more modern

beautiful - more beautiful

expensive  - more expensive

clever  celverer  or more clever

stupid  stupider  or more stupid

narrow  narrower or more narrow

gentle  gentler or more gentle

Jack is less strong than Johnny.

An airplane is faster than a car.

Dogs are more reliable than cats.

Mary is less experienced than Kate. 

Peter works more carefully than Joe.

Joe works less carefully than Peter.

A greyhound is faster than a snail.

A greyhound runs faster than a snail.

easy – easier

hard – harder

high – higher

late – later

loud – louder

low – lower

Charlie is more intelligent than Sue. Yes, but Sue is calmer.

I’m getting older and older.

It's getting colder and colder.

Things are getting more and more expensive in this shop.