Basic Research for Constructing Data base of the Variety of Japanese Sentenc ial Forms

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The purpose of this research is to make a basic study on sentence styles of Japanese, which is usually treated as a practical concept in educational domain, from a linguistic point of view for the purpose of constructing data base. In this research, I define the term "sentence styles" as variety of modal sentential forms. The results of this research are followings :1.I have published two papers which is concerned with classification of interrogative forms in colloquial language, one study on sentences of requiring confirmation and the other study on negative questions. And I have studied on "suru-kotoga-aru" in Modern Japanese as an instance of constructive predicate which expresses iterativity and possibility. I have read a paper on that subject and published the result of it.2.This research links to the activity of meeting for the study of descriptive grammar of Japanese (representative : NITTA, Yoshio). I have taken partial charge of describing the system of epistemic modality from comprehensive and referential points of view in this meeting.3.I have examined the method of constructing data base of the variety of Japanese sentential forms and constructed two types of data base as an experiment, one the type of paradigm and the other the type of attribute.4.I have contrived the method of extracting the pattern of sentential final forms from corpus automatically and I have opened text-processing program which realizes this idea to the public.