`1.` bigger

`2.` longer

`3.` highest

`4.` shortest

`5.` older

`6.` deepest

`7.` hottest

`8.` shorter

`9.` younger

`10.` smaller

`11.` taller

`12.` thicker

`13.` longest

`14.` higher

`15.` happiest

`16.` best

`17.` thinnest

`18.` coldest

`@` Kiến thức :

`-` So sánh hơn ( tính từ ngắn ) : S1 + V + adj-er + than + S2

`-` So sánh hơn ( tính từ dài ) : S1 + V + more + adj + than + S2

`-` So sánh nhất : S + V + the most + adj/adv/adj-est/adv-est (+ noun/pronoun)

1, Rivers are bigger than lakes.

2, The Mekong river is longer than the Red river.

3, Everest is the highest mountain in the world.

4, Hoa is the shortest girl in our class.

5, My mother is older than my teacher.

6, The Amazon River is the deepest river in the world.

7, The Summer is the hottest season in a year.

8, Nga and Lan are shorter than Minh.

9, My mother is younger than my father.

10, Ha Nọi is smaller than Ho Chi Minh city.

11, This boy is taller than that boy.

12, A dictionary is thicker than a notebook.

13, The Great Wall is the longest structure in the world.

14, Building are higher than houses.

15, Lan is the happiest student in my class.

16,  Our parents are the best people.

17, This girl is the thinnest in her class.

18, The winter is the coldest season in a year.

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So sánh hơn ( tính từ ngắn ) : 

S1 + V +S- adj + er + than + S2

So sánh hơn ( tính từ dài ) :

S1 + more + L -adj +than + O / N /....

So sánh nhất :

( + ) Tính từ ngắn : S + tobe + the + adj + est + N 

( - ) Tính từ dài : S + tobe + the most + adj + N