がんくびそうじゃありませんでした
雁首草じゃありませんでした
gankubisōjārimasendeshita

Noun
Desu Copula

The polite, past negative form of がんくびそう

1. Was not swan grass.; Was not Japanese water parsley.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana