There are severe limitations on the kinds of synchronic patterns and diachronic restructurings which may occur in existential-copulative-auxiliary systems, and such patterns and changes are related to syntactic characteristics of a very general typological nature. In other words, a particular pattern of constructions of ‘being’ tends to reflect the general syntactic character of the language, and changes in the pattern tend to form part of general typological shifts.
Standardized
There are severe limitations on the kinds of synchronic patterns and diachronic restructurings which may occur in existential-copulative-auxiliary systems, and such patterns and changes are related to syntactic characteristics of a very general typological nature. In other words, a particular pattern of constructions of ‘being’ tends to reflect the general syntactic character of the language, and changes in the pattern tend to form part of general typological shifts.
See #1975; spelled out by ##1978ff.