`-` So sánh bằng: S+ be/ V+ as+ adj/ adv+ as+ O

`15`. He doesn't walk as fast as he used to.

`16`. I can't swim as quickly as Jane.

`17`. That essay is not as difficult as this one.

`18`. That river is not as long as this one.

`19`. I don't sing as well as him.

`20`. I speak English the fastest.

`-` So sánh nhất ( adj `1` vần): S+ be+ V+ the+ adj/ adv+ est

`21`. I don't have as much money as them.

`15` He doesn't walk as fast as he used to

`16` I can't swim as quickly as Jane

`17` That essay is not as difficult as this one.

`18` That river is not as long as this one. 

`19` I don't sing as well as him. 

`20` I speak English the fastest

`21` I have less money than them

`@` So sánh bằng : as + adj/adv + as

`@` So sánh hơn

`-` Tính từ ngắn : be + tính từ ngắn thêm er + than 

`-` Tính từ dài : be + more + tính từ dài + than 

`@` So sánh nhất:

`-` Tính từ ngắn : be + the + tính từ ngắn thêm est ...

`-` Tính từ dài : be + the most + tính từ dài ...