Modern linguistics regards the written language as primary, not the written language.

Chomsky defines “competence” as the ideal user’s k（）of the rules of his language.

Social changes can often bring about language changes.

Language is p（）in that it makes possible the construction and interpretation of new signals by its users. In other words, they can produce and understand an infinitely large number of sentences which they have never heard before.

Phonology

In the study of linguistics, hypotheses formed should be based on language facts and checked against the observed facts.

D（）is one of the design features of human language which refers to the phenomenon that language consists of two levels: a lower level of meaningless individual sounds and a higher level of meaningful units.

Phonetics

The distinction between competence and performance was proposed by F. de Saussure.

Modern linguistics is different from traditional grammar.