youcanaddthetothelastwordinoneline

　　busy-busier-busiest

　　noisy-noisier-noisiest

　　cool-cooler-coolest

　　friendly-morefriendly-mostfriendly

　　heavy-heavier-heaviest

　　nice-nicer-nicest

　　old-older-oldest

　　safe-safer-safest

　　small-smaller-smallest

　　wet-wetter-wettest

　　famous-morefamous-mostfamous

　　good-better-best

　　beautiful-morebeautiful-mostbeautiful

　　popular-morepopular-mostpopular

　　crowded-morecrowded-mostcrowded

　　bad-worse-worst

　　cold-colder-coldest

　　foggy-foggier-foggiest