Adverbs

Most adverbs are formed by adding -mente to the feminine singular form of the adjective.  However, two common adverbs that do not end in -mente are despacio (slowly) and demasiado (too much).

Adjective	Adverb
correcto fácil claro absoluto rápido	correctamente fácilmente claramente absolutamente rápidamente	correctly easily clearly absolutely rapidly

Lo + adverb + que expresses how, while lo más + adverb + an expression of possibility is translated:  as ... as ...

lo bien que  how well
lo más pronto posible  as soon as possible