`1.` Today is the hottest day of this month.

`⇒` Today is hotter than other days.

`⇒` No day is hotter than today.

`⇒` No day is as hot as today.

`2.` My new Jeans are more expensive than yours.

`⇒` My new jeans aren't as cheap as yours.

`⇒` Your jeans are cheaper than mine.

`⇒` Your jeans aren't as expensive as mine.

`3.` Ngoc is better at math than Hoa.

`⇒` Ngoc isn't as bad at math as Hoa.

`⇒` Hoa is worse at math than Ngoc.

`⇒` Hoa isn't as good at math as Ngoc.

`-` So sánh hơn: `S1` `+` (more) `+` adj `+` (er) `+` than `+` `S2`

`-` So sánh ngang bằng: `S1` `+` tobe (not) `+` as/so `+` adj `+` as/so `+` `S2.`