早期 そうき警戒 けいかい管制 かんせい じゃありませんでした
sō kikeikaikanseikijārimasendeshita

Noun
Desu Copula

The polite, past negative form of 早期警戒管制機

1. Was not an early warning control aircraft.; Was not an early warning and control plane.

Past/Perfective
Negative
Polite
Terminal Form