Traduzca: Juan speaks as quickly as Amy.

For an equal comparison with an adverb, Spanish uses “tan + adverb + como.” “Quickly” is “rápidamente,” so the sentence is “Juan habla tan rápidamente como Amy.” “Tanta” is used with feminine nouns, not adverbs, and “que” does not express this equal comparison.

AI-written and checked against the verified answer.