1. old - older - the oldest2. big - bigger - the biggest3. much - more - the most4. silly - sillier - the silliest5. weak - weaker - the weakest6. heavy - heavier - the heaviest7. new - newer - the newest8. good - better - the best9. small - smaller - the smallest10. bad - worse - the worst11. fast - faster - the fastest12. slow - slower - the slowest13. tall - taller - the tallest14. happy - happier - the happiest15. fat - fatter - the fattest17. many - more - the most