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When referring to hypothetical future circumstance, there may be little difference in meaning between the first and second conditional (factual vs. counterfactual, realis vs. irrealis). The following two sentences have similar meaning, although the second (with the second conditional) implies less likelihood that the condition will be fulfilled:
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.
A conditional sentence is a sentence in a natural language that expresses that one thing is contingent on another, e.g., "If it rains, the picnic will be cancelled." They are so called because the impact of the sentence’s main clause is conditional on a subordinate clause.
In the compound verbal constructions, there are forms for the indicative mood, the conditional mood, a mood for conditional possibility ("would be able to"), an imperative mood, a mood of ability or possibility, a mood for hypothetical "if" clauses in the present or future time, a counterfactual mood in the past tense, and a subjunctive mood ...
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]
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 ...
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).