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

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

Modern linguistics is mostly prescriptive, but sometimes descriptive.

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.

General linguistics, which relates itself to the research of other areas, studies the basic concepts, theories, descriptions, models and methods applicable in any linguistic study.

Social changes can often bring about language changes.

Findings in linguistic studies can often be applied to the settlement of some practical problems. The study of such applications is generally known as a（）linguistics.

Syntax

Syntax is different from morphology in that the former not only studies the morphemes, but also the combination of morphemes into words and words into sentences.

Pragmatics