叙述 じょじゅつ用法 ようほうじゃないです
jojutsuyō hōjanaidesu

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 叙述用法

1. It's not how to describe it.; It's not the way to explain it.

Negative
Polite
Casual Register
Linguistics