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Some languages form the negative of existential clauses irregularly; for example, in Russian, есть yest ("there is/are") is used in affirmative existential clauses (in the present tense), but the negative equivalent is нет nyet ("there is/are not"), used with the logical subject in the genitive case.
Identificational clauses are used to present an object within a particular space. These are formed identically to existential clauses, followed by the addition of one of a set of suffixes -o, -no, and -ce, which correspond directly to the deictic prefixes a-, no-and ce-: karo-re-o "here / this is a fish".
In predicate logic, an existential quantification is a type of quantifier, a logical constant which is interpreted as "there exists", "there is at least one", or "for some". It is usually denoted by the logical operator symbol ∃, which, when used together with a predicate variable, is called an existential quantifier (" ∃x" or "∃(x)" or ...
In positive existential clauses, modification of the head noun or a fronted topic must be present to construct these clauses. In contrast, for negative existential clauses, there is no clause initial topic slot and the subject Noun Phrase can be solely constituted by the head noun. [23] This construction is demonstrated in the below example.
Predicates denoting possession may be formed either by using a verb (such as the English have) or by other means, such as existential clauses (as is usual in languages such as Russian). Some languages have more than two possessive classes. In Papua New Guinea, for example, the Anêm language has at least 20 and the Amele language has 32. [4] [5]
Existential clauses are common non-verbal clauses which occur within spoken Tawala, though they only occasionally occur within extended discourse. In Tawala, an existential clause consists of a nominal predicate and can often be negated by the addition of the negative particle that precedes the predicate.
The present copula in subordinate clauses is expressed by the subordinate perfect of honä, e.g.: däffär yähonä tädi-goy yalfu "he who is courageous will go with me. "It is he", etc. can be expressed by adding an element -tt between the pronoun and the copula: e.g. kʷa-ttə-n "it is he". The existential verb "be at", "exist" in the ...
In predicate logic, existential generalization [1] [2] (also known as existential introduction, ∃I) is a valid rule of inference that allows one to move from a specific statement, or one instance, to a quantified generalized statement, or existential proposition.