Social changes can often bring about language changes.

General linguistics is generally the study of language as a whole.

The study of the ways in which morphemes can be combined to form words is called morphology.

Modern linguistics is mostly prescriptive, but sometimes descriptive.

The study of meaning in language is known as semantics.

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

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

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.

Morphology studies how words can be formed to produce meaningful sentences.