Sentence #1 has a demonstrative adjective. Sentence #2 has both a demonstrative adjective and a demonstrative pronoun. Sentence #3 uses a regular possessive pronoun. Sentence #4 is the only sentence that uses a present progressive tense.
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Acostarse, cepillarse, dormirse
Its spelled like this
Yo iba todos los dias al gimnasio para ser un mejor atleta.
I would to the gym every day to the gym to be a better athlete
