えりさんじゃなかったです
えり蚕じゃなかったです
erisanjanakattadesu

Noun
Desu Copula

The polite, past negative form of えりさん

1. Wasn't a silkworm.; Wasn't a domestic silkworm.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana