The goal is to distinguish between word forms (changing endings) and new words (adding prefixes/suffixes). (changing number/case) (changing tense/number) 2. Different words (related/single-root): КнигаК н и г а ПисатьП и с а т ь переписатьп е р е п и с а т ь
Since you asked for a story, here is one inspired by the themes of language and "related words" found in your textbook: The goal is to distinguish between word forms
You can find detailed, step-by-step breakdowns for various editions on sites like Resh.Skysmart for Grade 5 or Gdzometr . The Story: The Secret of the Ancient Library The goal is to distinguish between word forms