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In the English language, the Latin adverb sic is used as an adverb, and derivatively as a noun and as a verb. [3] The adverb sic, meaning 'intentionally so written', first appeared in English c. 1856. [4] It is derived from the Latin adverb sīc, which means 'so', 'thus', 'in this manner'. [5]
Phrase structure rules as they are commonly employed result in a view of sentence structure that is constituency-based. Thus, grammars that employ phrase structure rules are constituency grammars (= phrase structure grammars), as opposed to dependency grammars, [4] which view sentence structure as dependency-based. What this means is that for ...
In linguistics and grammar, a sentence is a linguistic expression, such as the English example "The quick brown fox jumps over the lazy dog."In traditional grammar, it is typically defined as a string of words that expresses a complete thought, or as a unit consisting of a subject and predicate.
The word grammar often has divergent meanings when used in contexts outside linguistics. It may be used more broadly to include orthographic conventions of written language , such as spelling and punctuation, which are not typically considered part of grammar by linguists; that is, the conventions used for writing a language.
Words combine to form phrases. A phrase typically serves the same function as a word from some particular word class. [3] For example, my very good friend Peter is a phrase that can be used in a sentence as if it were a noun, and is therefore called a noun phrase.
The term phrase structure grammar was originally introduced by Noam Chomsky as the term for grammar studied previously by Emil Post and Axel Thue (Post canonical systems). Some authors, however, reserve the term for more restricted grammars in the Chomsky hierarchy : context-sensitive grammars or context-free grammars .
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]
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.