芋掘 いもほ坊主 ぼうずではありませんでした
imohoribōzudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 芋掘り坊主

1. Was not a digger of sweet potatoes.; Was not a sweet potato digger.

Past/Perfective
Negative
Polite
Formal Register