Syntagmatic and paradigmatic relations
Language works through relations of difference, then, which place signs
in opposition to one another. Saussure asserted that there are only two types
of relations: syntagmatic and paradigmatic. The latter is associative, and
clusters signs together in the mind, producing sets: sat, mat, cat,bat, for example, or thought, think, thinking, thinker.
Sets always involve a similarity, but difference is a prerequisite, otherwise
none of the items would be distinguishable from one another: this would result
in there being a single item, which could not constitute a set on its own.
These two forms of relation open linguistics up to phonology, morphology,syntax and semantics. Take morphology, for example. The
signs cat and cats are associated in the mind, producing an
abstract paradigm of the word forms of cat. Comparing this with other
paradigms of word forms, we can note that in the English language the plural
often consists of little more than adding an s to the end of the word.
Likewise, in syntax, through paradigmatic and syntagmatic analysis, we can
discover the grammatical rules for constructing sentences: the meaning of je
dois (“I should”) and dois je? (“Should I?”) differ completely
simply because of word order, allowing us to note that to ask a question in
French, you only have to invert the word order.
Since syntagmas can belong to speech, the linguist must identify how
often they are used before he can be assured that they belong to the language.