あまがさへびじゃなかったです
雨傘蛇じゃなかったです
amagasahebijanakattadesu

Noun
Desu Copula

The polite, past negative form of あまがさへび

1. It wasn't an umbrella snake.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana