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https://en.wikipedia.org/wiki/Construction_grammar 

In linguistics, construction grammar (often abbreviated CxG) is a family of theories within the field of cognitive and evolutionary linguistics. These posit that human language consists of constructions, or learned pairings of linguistic forms with functions or meanings. Constructions correspond to replicators or memes in memetics and other cultural replicator theories. Constructions can be individual words (aardvark, avocado), morphemes (anti-, -ing), fixed expressions and idioms (by and large, jog X's memory), and abstract grammatical rules such as the passive voice (The cat was hit by a car) or ditransitive (Mary gave Alex the ball). Any linguistic pattern is considered to be a construction as long as some aspect of its form or its meaning cannot be predicted from its component parts, or from other constructions that are recognized to exist. In construction grammar, every utterance is understood to be a combination of multiple different constructions, which together specify its precise meaning and form.

One of the most distinctive features of CxG is its use of multi-word expressions and phrasal patterns as the building blocks of syntactic analysis. One example is the Correlative Conditional construction, found in the proverbial expression The bigger they come, the harder they fall. Construction grammarians point out that this is not merely a fixed phrase; the Correlative Conditional is a general pattern (The Xer, the Yer) with "slots" that can be filled by almost any comparative phrase (e.g. The more you think about it, the less you understand). Advocates of CxG argue these kinds of idiosyncratic patterns are more common than is often recognized, and that they are best understood as multi-word, partially filled constructions.

Construction grammar rejects the idea that there is a sharp dichotomy between lexical items, which are arbitrary and specific, and grammatical rules, which are completely general. Instead, CxG posits that there are linguistic patterns at every level of generality and specificity: from individual words, to partially filled constructions (e.g. drive X crazy), to fully abstract rules (e.g. subject–auxiliary inversion). All of these patterns are recognized as constructions.

In contrast to theories that posit an innate universal grammar for all languages, construction grammar holds that speakers learn constructions inductively as they are exposed to them, using general cognitive processes. It is argued that children pay close attention to each utterance they hear, and gradually make generalizations based on the utterances they have heard. Because constructions are learned, they are expected to vary considerably across different languages.

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