To make comparisons of equality, Spanish uses the following constructions:
1. tan + [adjective/adverb] + como
Adjective: Mi casa es tan grande como la de mi hermano. My house is as big as my brother's.
Adverb: Mi perro caza tan bien como el tuyo. My dog hunts as well as yours.
2. [verb] + tanto como
Mi amiga Cecelia viajaba tanto como yo. My friend Cecelia used to travel as much as I did.
3. tanto/a(s) + [Singular/plural noun] + como
Cunado viajo a la ciudad, tengo tantas maletas como tú. When I travel to the city, I have as many suitcases as you.