Attractive-more attractive-most attractive
slim-slimmer-the slimmest
wise-wiser-the wisest
free-freer-the freest
bouncy-bouncier-the bounciest
curious-more curious-the most curious
shy-shier-the shiest
thin-thinner-the thinnest
tidy-tidier-the tidiest
cheerful-more cheerful-the most cheerful