深山 みやま川蜻蛉 かわとんぼではありませんでした
miyamakawa tombodewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 深山川蜻蛉

1. Was not a mountain stream dragonfly.; Was not a deep mountain river dragonfly.

Past/Perfective
Negative
Polite
Formal Register