* từ gốc→ so sánh nhất→ so sánh hơn

1. quiet → quietest→ quieter

2. thin→ thinnest → thinner

3. bad→ worst→ worse

4. dirty→ dirtiest→ dirtier

5. fit →fittest → fitter

6. much → most → more

7. noisy → noisiest → noisier

18. good → best → better

9. convenient → the most convenient → more convenient

10. narrow → narrowest →  narrower

21. big → biggest → bigger

22. little→ 

23. small → smallest → smaller 

24. difficult → the most difficult → more difficult

25. pretty→ prettiest→ prettier

16. delicious → the most delicious → more delicious

27. young → youngest → younger

28. long→ longest → longer

29. boring- the most boring → more boring

20. happy→ happiest → happier

1. quiet=>quieter=> the quietest

2.thin=>thinner=> the thinnest

3.bad=>worse=> the worst

4.dirty=>dirtier=>the dirtiest

5.fit=>fitter=>the fittest

6.much=>more=>most

7.noisy=>noisier=> the noisiest

18.good=>better=>the best

9.convenient=> more convenient=>the most convenient

10.narrow=>narrower=>the narrowest

21.big=>bigger=> the biggest

22.little=>less=>least

23.small=>smaller=> the smallest

24.difficult=>more difficult=>the most difficult

25.pretty=>prettier=>the prettiest

16.delicious=>more delicious=>the most delicious

27.young=>younger=>the youngest

28.long=>longer=>the longest