むかしとんぼでわありませんでした
昔蜻蛉ではありませんでした
mukashitombodewārimasendeshita

Noun
Desu Copula

The polite, past negative form of むかしとんぼ

1. Was not a dragonfly.; Was not an ephemeral being.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana