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Speakers use a finite set of rules to produce and understand
an infinite set of possible sentences. These rules comprise the
grammar of a language, which is learned when you acquire the
language and includes the sound system, the structure of words,
how words may be combined into phrases and sentences, the
ways in which sounds and meanings are related, and the words
or lexicon. The sounds and meanings of these words are related
in an arbitrary fashion. And so are the gestures used by deaf
signers. Language, then, is a system that relates sounds (or hand
and body gestures) with meanings; when you know a language
you know this system.
FROMKIN, V., Rodman, R., Hyams, N. An Introduction to Language. 10th
edition Wadsworth Cengage. Learning. 2013. Adaptado
