The answer provides example sentences in the imperfect tense using verbs in -ar, -er, and -ir forms.
Verb -ar form: Ella bailaba en la fiesta (She used to dance at the party).
Verb -er form: Nosotros comíamos pizza los viernes (We used to eat pizza on Fridays).
Verb -ir form: Tú vivías en esa casa (You used to live in that house).
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