いもむしじゃなかったです
芋虫じゃなかったです
imomushijanakattadesu

Noun
Desu Copula

The polite, past negative form of いもむし

1. Wasn't a caterpillar.; Was not a caterpillar.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana