1.tall->taller->tallest

2.cold->colder->coldest

3.thin->thinner->thinnest

4.strong->stronger->strongest

5.wet->wetter->wettest

6.old->older->oldest

7.clean->cleaner->cleanest

8.cheap->cheaper->cheapest

9.cool->cooler>coolest

10.happy->happier->happiest

11.noisy->noisier->noisiest

12.easy->easier->easiest

13.awful->awfuler->awfulest

14.delicious->more delicious->the most delicious

15.famous->more famous->the most famous

16.beautiful->more beautiful->the most beautiful

17.bad->worse->worst

18.much->

19.little

20.good->better->best

Bài tập

1.July is hotter than June

2.My house is older than your house.

3.Nga is thinner than Lan.

4.The boys are stronger than the girls.

5.This book is cheaper than that book.

6.Mai is the youngest child in her family.

7.Fansipan is the highest mountain in Viet Nam.

8.Linh is the best student in my class.

9.Ba is more talkstive thhan Long.

10.This film is more interesting than that film.

11.This dress is the most expensive in this shop.

12.Hoa is the most hard-working student in our class.