Final answer:
The sentence 'You say good-bye' in Spanish is 'Tú dices adiós.'
Step-by-step explanation:
The sentence that means 'You say good-bye' in Spanish is 'Tú dices adiós.' In this sentence, 'tú' is the informal singular pronoun for 'you,' 'dices' is the second-person singular form of the verb 'decir' which means 'to say,' and 'adiós' means 'good-bye.'
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