- Comparing 2 things/people:
bigger, smaller, taller, smarter- General rule: +er (short words) + more (long words)
faster, clearer, cheaper more expensive, more beautiful
- Words ending on -y get +ier: lucky > luckier, easy > easier
- Adverbs ending on -ly get +more: easily > more easily
- Usually in combinatie with "than": cooler than, warmer than