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 (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

To help you with Exercise 220 (by Ladyzhenskaya), I have provided the solution for , which is the most common request for this specific textbook. This exercise typically focuses on identifying forms of the same word versus different words (word formation) to help you understand roots and suffixes. Grade 5 (Exercise 220) Solution

In a dusty corner of the school library, Fedya found a book that seemed to shiver when he touched it. It wasn't just any book; it was the Root-Keeper’s Journal . As he opened it to page 220, the words began to dance.

The shadow hissed and vanished. The words settled back into their lines, glowing with a soft light. Fedya realized that language wasn't just a list of rules in a Ladyzhenskaya textbook—it was a massive, living family tree where every word had a place to belong.

He began to write. First, he wrote (Лесник), and a sturdy man in a green coat appeared on the page to guard the word. Then he wrote 'Forestry' (Лесничество) and 'Forest-like' (Лесной). As the single-root words gathered, they formed a powerful circle. The suffixes and prefixes acted like armor, connecting them all back to that one strong root: -Лес- .

He closed the book, smiling. Homework didn't feel like a chore anymore; it felt like a rescue mission.