The Spanish expression "tan como"

In comparisons of equality, the English formula as + adverb/ adjective + as is translated into Spanish by tan + adverb/ adjective + como.

Ella no habla tan claramente como él.
She doesn't speak as clearly as he.

Ana no es tan bella como María.
Anne is not as pretty as Mary.

Comparison of adverbs in Spanish

Adverbs are compared like adjectives. Only four adverbs have irregular comparative forms.

mucho a lot, very
poco little

bien well
mal badly

más more
menos less

mejor better
peor worse

Este estudiante habla mejor que yo.
This student speaks better than I.

Carmen trabaja menos que la otra enfermera.
Carmen works less than the other nurse.