Ответ:

interesting - more interesting - the most interesting

big - bigger - the biggest

small - smaller - the smallest

expensive - more expensive - the most expensive

thin - thinner - the thinnest

shirt - shorter - the shortest

exciting - more exciting - the most exciting

fat - fatter -the fattest

fantastic - more fantastic - the most fantastic

colorful - more colorful - the most colorful

young - younger - the youngest

new - newer - the newest

delicious - more delicious - the most delicious

old - older - the oldest