`2` happier

`3` more carefully

`4` earlier

`5` shorter

`6` bigger

`7` more speacial

`8` more expensive

`9` more attractive

`10` thinner

`11` faster

`12` more famous

`13` easilier

`14` larger

`15` more boring

`16` more tired

`17` more useful

`18` heavier

`19` better

`20` more clever 

$---------------------$ 

`->` So sánh hơn

`-` $Adj$

`+` Short adj : tobe + adj-er + than

`+` Long adj : tobe + more adj + than

`-` $Adv$

`+` Short adv : V(chia theo thì) + adv-er + than

`+` Long adv : V(Chia theo thì) + more adv + than