Obligatory and optional constructions in english sentences

Аннотация

The concepts of obligatory and optional in the syntax are used within the framework of the compatibility characteristic, which is determined by the valence properties of words. Conformity is not related to the position of words in the structure of the sentence, therefore it manifests itself in all syntactic structures, for example, "the girl, playing the violin", "playing the violin, the girl went to the window", etc. At the same time, many scientists point out that valence compatibility is provided by the lexical semantics of words. At the same time, this type of compatibility in science is called grammatical compatibility, and the scientists describe its obligatory and optional nature as structural one.