The dative case typically identifies the indirect object—the person for whom or to whom an action is performed. It answers the question
(to tell): Opa erzählt uns (Dat) eine Geschichte (Akk). List Of Accusative And Dative Verbs In German Pdf
Remember that only the masculine article changes in the accusative ( der becomes den ), while the dative changes for all genders ( der/das → dem , die → der , die pl. → den ). die → der