Prepositional constructions in split sentences: the value "existential"

Cleft Sentences have been described on the basis of the relationship 'predicative especificative' in the framework of the copulative sentences. However, those that are headed by prepositional constructions have characteristics which affect the properties of concordance, both time and number, between the cleaved element and the relative free construction, so that the value that must be attributed to the verb to be in this type of sequences is itself predicative. As well, may be distinguished two semantic nuances in relation to the direction "existential" to be: the first concerns the notion of 'reality', while a second is equivalent to the process of 'performance', forming, from this contrast, modes of action 'atelics' and 'telics', respectively.