Adjetives

Comparative form
We use  -er... than, lees...  than and  more...than to compare two people or things
Examples:
Mery is taller than Susan.
Comedies are more popular than dramas.
Dramas are less popular than horror films.


Superlative form
We use the most..., the least... and the...-est to compare three or more people or things.
Examples:
Is this the longest film you have ever seen?
Johnny Depp is the most hadmsome actor in Hollywood.
Peter plays the least interesting role in the film.

as...as, too, (not)...enough
Julia Roberts is as beautiful as Gwyneth Paltrow
I´m too short to be a model
I´m (not) old enought to study acting