TAILIEUCHUNG - Báo cáo khoa học: "A CCG APPROACH TO FREE WORD ORDER LANGUAGES"

" Dept. of Computer and Information Sciences University of Pennsylvania P h i l a d e l p h i a , PA 1 9 1 0 4 (hoffman@ ) INTRODUCTION In this paper, I present work in progress on an extension of Combinatory Categorial Grammars, CCGs, (Steedman 1985) to handle languages with freer word order than English, specifically Turkish. The approach I develop takes advantage of CCGs' ability to combine the syntactic as well as the semantic representations of adjacent elements in a sentence in an incremental manner. The linguistic claim behind my approach is that free word. | A CCG APPROACH TO FREE WORD ORDER LANGUAGES Beryl Hoffman Dept of Computer and Information Sciences University of Pennsylvania Philadelphia PA 19104 hoffman@ INTRODUCTION In this paper I present work in progress on an extension of Combinatory Categorial Grammars CCGs Steedman 1985 to handle languages with freer word order than English specifically Turkish. The approach I develop takes advantage of CCGs ability to combine the syntactic as well as the semantic representations of adjacent elements in a sentence in an incremental manner. The linguistic claim behind my approach is that free word order in Turkish is a direct result of its grammar and lexical categories this approach is not compatible with a linguistic theory involving movement operations and traces. A rich system of case markings identifies the predicate-argument structure of a Turkish sentence while the word order serves a pragmatic function. The pragmatic functions of certain positions in the sentence roughly consist of a sentence-initial position for the topic an immediately pre-verbal position for the focus and post-verbal positions for backgrounded information Erguvanli 1984 . The most common word order in simple transitive sentences is sov Subject-Object-Verb . However all of the permutations of the sentence seen below are grammatical in the proper discourse situations. 1 a. Ay e gazeteyi okuyor. Ayje newspaper-acc read-present. Ay e is reading the newspaper. b. Gazeteyi Ayịe okuyor. c. Ay e okuyor gazeteyi. d. Gazeteyi okuyor Ay e. e. Okuyor gazeteyi Ay e. f. Okuyor Ay e gazeteyi. Elements with overt case marking generally can scramble freely even out of embedded clauses. This suggest a CCG approach where case-marked elements are functions which can combine with one another and with verbs in any order. 1 thank Young-Suk Lee Michael Niv Jong Park Mark Steedman and Michael White for theứ valuable advice. This work was partially supported by ARO DAAL03-89-C-0031 DARPA .

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