Linguistics

Phonetics is different from phonology in that the latter studies the combinations of the sounds to convey meaning in communication.

Social changes can often bring about language changes.

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.

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

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

Pragmatics is different from semantics in that pragmatics studies meaning not in isolation, but in context.

Langue refers to the a（）linguistic system shared by all the members of a speech community while the parole is the concrete use of the conventions and application of the rules.

Linguistics is generally defined as the s（）study of language.

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