1. Kate dances more gracefully than Mary
-Mary doesn't dance more gracefully than Mary
2.This exercise is not as easy as that one
-That exercise is more difficult than this one.
3.John can't type as quickly as Peter.
Peter can type more quickly than John.
4. My brother is tall but you are taller.
-My brother is shorter than you.
5.Dogs are friendlier than cats.
-Cats aren't friendlier than dogs.
6.Linda sang more beautifully than her friend.
-Linda's friend didn't sing more beautifully than her.
7.John is the tallest student in his class.
-No one in my class as tall as John.
8.Mary is better at Math than Susan.
-Susan isn't better Math than Mary.
9.I can't play tennis as well as my brother does,
-My brother can play tennis better than me.
10.No one in the group is younger than her.
-She is the youngest in the group.
11.Jane can swim further than I can
-I can't swim as far as Jane.
12.Jane is prettier than my sister.
-My sister. isn't prettier than Jane.