1. Regular Comparatives in adjectives
Comparatives are used to compare people, places, things or actions.
“He's taller than them”
“They are shorter than him”
It always goes “than” after the comparative:

2. RULES RULE 1. One syllable adjectives add -ER.
“Travelling by bus is cheaper than travelling by plane”

3. RULES
RULE 2.
If the adjective finishes in a consonant+vowel + consonant, double final consonant+ -ER
“Australia is bigger than Europe”

4. RULES “Eating fruit is healthier than eating meat” RULE 3.
One or Two-syllable adj. ending in consonant+“y”=i
“Eating fruit is healthier than eating meat”

5. RULES “Travelling by plane is more expensive than travelling by bus”
Two or more syllable adjectives use “MORE” before the adjective:
“Travelling by plane is more expensive than travelling by bus”

6. Rules for regular comparatives
ADJECTIVE
COMPARATIVE
RULE 1.-ONE SYLLABLE ADJECTIVE
CHEAP
CHEAP-ER
RULE 2.-
ONE SYLLABLE ADJ WITH A CONSONANT-VOWEL- CONSONANT PATTERN (CVC)
except W/Y
THIN-HOT-BIG
SLOW-GREY
THIN-NER, HOT-TER, BIG-GER
SLOW-ER GREY-ER
RULE 3.- 1/2 SYLLABLE ADJECTIVES ENDING IN -Y= I+EST
HEALTHY
EASY
HAPPY
PRETTY
HEALTH-IER, EAS-IER, HAPP-IER, PRETT-IER
RULE 4.- TWO OR MORE SYLLABLES ADJ.=MOST
EXPENSIVE
MORE EXPENSIVE

7. ADJECTIVE
COMPARATIVE
RULE 1
FAST
FASTER
TALL
TALLER
COLD
COLDER
RULE 2
SAD
SADDER
HOT
HOTTER
FAT
FATTER
BIG
BIGGER

8. ADJECTIVE
COMPARATIVE
RULE 3
BUSY
BUSIER
PRETTY
PRETTIER
NOISY
NOISIER
HEALTHY
HEALTHIER
RULE 4
BEAUTIFUL
MORE BEAUTIFUL
EXPENSIVE
MORE EXPENSIVE
INTERESTING
MORE INTERESTING

9. Irregular comparatives in adjectives
GOOD
BETTER(mejor)
BAD
WORSE (peor)
FAR
FURTHER(más lejos)
TIRED
MORE TIRED(más cansado)
STRESSED
MORE STRESSED(más estresado) ”
“Helen speaks French better than Philip”
“Sally drives worse than Anna.
“My house is further from school than yours”
“She's more stressed than you”
“I'm more tired than him”
“John is more bored than her”