後期 こうき中等 ちゅうとう教育 きょういくじゃありませんでした
kōkichūtō kyō ikuja arimasendeshita

Noun
Desu Copula

The polite, past negative form of 後期中等教育

1. Was not/were not in late middle/high school.; Was not/were not a late middle/high school student.

Past/Perfective
Negative
Polite
Terminal Form