Comparing two things: taller, more expensive, better
Subject + be + comparative + than + object
Subject + be + not + as + adjective + as + object
Is X + comparative + than + Y?
💡 Double final consonant after short vowel: big → bigger, hot → hotter.
✓This book is more interesting than that one.
✗This book is interestinger than that one.
Long adjectives use 'more'.
✓She's happier now.
✗She's more happy now.
Adjectives ending in -y use -ier.
✓He's better at math than me.
✗He's gooder at math than me.
Good is irregular: better.