特殊 とくしゅ潜航 せんこう ていじゃありませんでした
tokushusen kōteijārimasendeshita

Noun
Desu Copula

The polite, past negative form of 特殊潜航艇

1. Was not a special submersible.; Was not a special submarine.

Past/Perfective
Negative
Polite
Terminal Form