Focus and the Semantic Component

In studying the facts of language, two domains have been devised in the process of defining grammatical relations: a. Sentence Grammar which encompasses phenomena belonging to clause level, with NP and S (or S') as the relevant domains in which to specify syntactic constraints and dependencies. This theoretical abstraction is so restricted to be able to account for basic facts of competence in language acquisition; b. Discourse Grammar which is crucially grafted into rules of sentence grammar; it does not directly relate to unconscious and innate LAD mechanisms but stems and develops on extralinguistic, contectual/situational or pragmatic conditions.