仮定 かてい ほう過去 かこ完了 かんりょうだったら
kateihōka kokanryōdattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 仮定法過去完了

1. If/when… had been; If/when… were to have been

Tara Conditional
Linguistics