住宅 じゅうたく よう火災 かさい警報 けいほう だったら
jūtakuyōka saikeihōkidattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 住宅用火災警報器

1. If it were a residential fire alarm; If it had been a residential fire alarm; When it was a residential fire alarm

Tara Conditional