はこがまえじゃなかったです
匚構えじゃなかったです
hakoga maejanakattadesu

Noun
Desu Copula

The polite, past negative form of はこがまえ

1. Didn't intend to.; Didn't plan to.; Wasn't thinking of.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana