Study On Classification Of Protases

There are many divaricated opinions about the re-assorting of protases and the sort of correlatives in the grammatical field. These make it difficult in teaching and using of protases. This paper based on the different viewpoints, classifies them by logic semantics and logic divisiory methods, and explains the correlatives'new semantic functions, to find out the more objective understanding of protases.Because the divisiory standards of protases are different in grammatical field, there are five different structural layers and eight divisory systems in re-assorting of protases. At present, it is popular to classify protases as"condition"and"non-condition"at the first step, and then to classify the"condition"as"sufficient condition"and"necessary condition"at the second step, just as they did in Current Chinese by Huang Borong and Liao Xudong. Aiming at so many different divaricated opinions about the re-assort of protases, this paper researches the protases from objective and subjective angles inside the sentences, and from static and dynamic angles outside the sentences. It establishes new standards for constructing the sort of protases and re-assorting them. The standards depend on the logic semantics at first and depend on the correlatives at second. By demonstrating the standards, this paper abandons the"non-condition"and classifies the sentences which belong to"non-condition"as"sufficient condition","necessary condition"and"sufficient-necessary condition"over again. And the paper transforms the popular dichotomy in two layers forms into trisection in one layer forms as"sufficient condition","necessary condition"and"sufficient-necessary condition". In addition, this paper points out the conditions which of"necessary condition"transforms into"sufficient-necessary condition", and points out the mistakes of distinguishing the sort of protases as well as the methods of correcting the errors.The innovative parts of this paper are: the two kinds of angles for re-assorting the protases; the two kinds of standards for constructing the sort of protases; the abandonment of"non-condition"and classifying them as"sufficient condition","necessary condition"and"sufficient-necessary condition"; the tables of the complicated relationships between three kinds of protases and correlatives; the contexts for"necessary condition"becoming"sufficient-necessary condition"and the mistakes of distinguishing the sort of protases as well as the methods of correcting the errors.