noun
subjunctive past perfect
Linguistics term for the past perfect subjunctive mood, used in hypothetical or counterfactual statements about the past.
英語の仮定法過去完了は「If I had known...」のような形をとる。
The English subjunctive past perfect takes a form like 'If I had known...'.
Compound of 仮定法 (subjunctive mood) + 過去 (past) + 完了 (perfect). A technical term in Japanese grammar for describing the past perfect subjunctive in languages like English.