COMPOSITE SENTENCE WITH PARENTHETICAL CLAUSE AS AN INVARIANT TYPE OF SYNTACTIC UNIT IN LANGUAGE

Abstract

The article touches upon the problem of the theory of invariant types of syntactic units, mainly of composite sentences which needs a unified approach, for there are a huge number of notions and terms, one way or another relating to various aspects of the latter indiscriminately treated and commented on. In the article an attempt has been made by the author to take inventory of the existing invariant types of syntactic units, which are traditionally considered to be five- fold, but the author reveals and establishes one more invariant type of composite sentence termed by him “ composite sentence with a parenthetical clause of two subtypes: a) introductory; b) insertive, realizing the new introductory and insertive relations termed by the author accordingly:1)introduction; 2) insertion like syntactic relations “coordination” and “subordination”, hence, as to the author, introductory and insertive clauses function like the other clauses as introductory and insertive parts of sentence.