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When the condition refers to the past, but the consequence to the present, the condition clause is in the past perfect (as with the third conditional), while the main clause is in the conditional mood as in the second conditional (i.e. simple conditional or conditional progressive, but not conditional perfect).
The optative mood (/ ˈ ɒ p t ə t ɪ v / OP-tə-tiv or / ɒ p ˈ t eɪ t ɪ v / op-TAY-tiv; [1] abbreviated OPT) is a grammatical mood that indicates a wish or hope regarding a given action.It is a superset of the cohortative mood and is closely related to the subjunctive mood but is distinct from the desiderative mood.
The counterfactual example uses the fake tense form "owned" in the "if" clause and the past-inflected modal "would" in the "then" clause. [1] As a result, it conveys that Sally does not in fact own a donkey. [2] Similar contrasts are common crosslinguistically, though the specific morphological marking varies from language to language. [3] [4 ...
Examples are the English and French conditionals (an analytic construction in English, [c] but inflected verb forms in French), which are morphologically futures-in-the-past, [1] and of which each has thus been referred to as a "so-called conditional" [1] [2] (French: soi-disant conditionnel [3] [4] [5]) in modern and contemporary linguistics ...
The "if"-clause of a conditional sentence is called the protasis, and the consequent or main clause is called the apodosis. The negative particle in a conditional clause is usually μή (mḗ), making the conjunctions εἰ μή (ei mḗ) or ἐὰν μή (eàn mḗ) "unless", "if not". However, some conditions have οὐ (ou). [1]
Moreover, languages that do use the subjunctive for such conditionals only do so if they have a specific past subjunctive form. Thus, subjunctive marking is neither necessary nor sufficient for membership in this class of conditionals. [12] [13] [9] The terms counterfactual and subjunctive have sometimes been repurposed for more specific uses ...
The conditional perfect is a grammatical construction that combines the conditional mood with perfect aspect.A typical example is the English would have written. [1] The conditional perfect is used to refer to a hypothetical, usually counterfactual, event or circumstance placed in the past, contingent on some other circumstance (again normally counterfactual, and also usually placed in the past).
The corresponding logical symbols are "", "", [6] and , [10] and sometimes "iff".These are usually treated as equivalent. However, some texts of mathematical logic (particularly those on first-order logic, rather than propositional logic) make a distinction between these, in which the first, ↔, is used as a symbol in logic formulas, while ⇔ is used in reasoning about those logic formulas ...