rasubjunctive

Rasubjunctive is a proposed grammatical mood described in theoretical linguistics and some constructed-language grammars. It is intended to mark propositions that are hypothetical or contingent within subordinate clauses, while signaling a sense of realizability under a stated condition. The term is not widely attested in natural languages and largely appears in discussions of mood typology or in conlang documentation.

Morphology and syntax for rasubjunctive systems vary by language. In many analyses, rasubjunctive forms are realized with a dedicated marker on the verb of the subordinate clause, which may be a prefix, clitic, or separate particle. Some descriptions allow interaction with tense and aspect in both the subordinate and main clauses, while others treat rasubjunctive as primarily a mood-level distinction with minimal cross-clausal agreement.

Semantically, rasubjunctive clauses express events that are possible or realizable if a given condition is met, but that are not asserted as actualized. This places rasubjunctive readings between the subjunctive and irrealis moods and often overlapping with conditional and counterfactual readings, depending on context and语言-specific rules.

Cross-linguistic and construction-language usage notes that rasubjunctive remains a theoretical or experimental category rather than a widespread natural-language phenomenon. Descriptions emphasize its potential to encode nuanced contingent reality and its usefulness in constructed languages for specifying modality beyond traditional moods.

See also: subjunctive mood, irrealis, conditional mood, counterfactual.