The criterion of predication and nomination

A word is a nominative unite as a phrase too and the sentence has both nominative and predicative

1. The classification of sentence in accord with the aim of communication:

The simple sentence

Declarative

Interrogative Imperative Exclamatory

- general

- special

Affirmative negative - alternative

- disjunctive

To sum up:

All definitions (except for Blokh`s) were based on one criteria: psychological, logical, on form.