Công thức so sánh bằng :

`@` S+tobe+as+adj+as+S2

`@` S+V+as+adv+as+S2

VD:

`1,` His brother is as tall as he.

`2,` She cook as well as me.

`3,` He was as white as a sheet. 

Công thức so sánh không bằng:

`@` S+tobe+not+so/as+adj+as+S2

`@` S+V+not+so/as+adv+as+S2

VD:

`1,` She doesn't play so well as he

`2,` He isn't so tall as me

`3,` I don't cook so well as my mother

`-` So sánh bằng

`+` Linh types twice as fast as me

`+` Her book costs three times as much as mine.

`+` She sings as beautifully as a singer

`→` Công thức so sánh bằng: S + V + as + (adj/ adv) + as + O

`-` So sánh không bằng

`+` Manslaughter is not as bad as murder

`+` Your coffee is not as good as the coffee my mother makes

`+` Mary is not as intelligent as Linda.

`→` Công thức so sánh không bằng : S + to be/ V + NOT as + adj/ adv + as + O