Breakdown of Ella corría tan rápido como tú, pero no ganó la medalla.
tú
you
ella
she / her (after a preposition)
rápido
fast
no
no / not
Questions & Answers about Ella corría tan rápido como tú, pero no ganó la medalla.
Why does this sentence use corría (imperfect) for running but ganó (preterite) for winning?
The imperfect corría sets the scene and describes an ongoing action in the past. It gives the background information that she was running. The preterite ganó is used for the specific, completed event at the end of the race: the fact that she did not win. Mixing these two past tenses is very common when telling a story.
Why is it tan rápido como instead of tanto rápido como?
When comparing adjectives or adverbs, like rápido here, you always use tan ... como to mean 'as ... as'. You only use tanto (or its matching forms like tanta and tantos) when comparing nouns, for example if you were saying 'as much money as' or 'as many medals as'.
Since rápido is describing a woman (ella), shouldn't it be feminine: rápida?