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Although the DP analysis is the dominant view in generative grammar, most other grammar theories reject the idea. For instance, representational phrase structure grammars follow the NP analysis, e.g. Head-driven Phrase Structure Grammar, and most dependency grammars such as Meaning-Text Theory, Functional Generative Description, and Lexicase Grammar also assume the traditional NP analysis of ...
In other words, the whole sentence is not categorized as a noun phrase or a verb phrase, but as a new unit—a sentence—which is an exocentric construction. The rule S → NP VP demonstrates how the combination of these parts creates a new structure that doesn’t directly reflect the properties of its individual components.
In terms of phrase structure rules, phrasal categories can occur to the left of the arrow while lexical categories cannot, e.g. NP → D N. Traditionally, a phrasal category should consist of two or more words, although conventions vary in this area. X-bar theory, for instance, often sees individual words corresponding to phrasal categories ...
Syntactic theories based on phrase structure typically analyze subject–aux inversion using syntactic movement. In such theories, a sentence with subject–aux inversion has an underlying structure where the auxiliary is embedded deeper in the structure. When the movement rule applies, it moves the auxiliary to the beginning of the sentence. [5]
A number of representational phrase structure theories of grammar never acknowledged phrase structure rules, but have pursued instead an understanding of sentence structure in terms the notion of schema. Here phrase structures are not derived from rules that combine words, but from the specification or instantiation of syntactic schemata or ...
Phrase structure is a one-to-one-or-more correspondence, which means that, for every element in a sentence, there are one or more nodes in the structure that correspond to that element. The result of this difference is that dependency structures are minimal [ 7 ] compared to their phrase structure counterparts, since they tend to contain many ...
A word sequence is shown to be a phrase/constituent if it exhibits one or more of the behaviors discussed below. The analysis of constituent structure is associated mainly with phrase structure grammars, although dependency grammars also allow sentence structure to be broken down into constituent parts.
An incomplete sentence, or sentence fragment, is a set of words that does not form a complete sentence, either because it does not express a complete thought or because it lacks some grammatical element, such as a subject or a verb. [6] [7] A dependent clause without an independent clause is an example of an incomplete sentence.