がんくびそうじゃなかったです
雁首草じゃなかったです
gankubisōjanakattadesu

Noun
Desu Copula

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

1. Wasn't goosegrass.; Wasn't barnyardgrass.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana