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近年来,系统功能语言学研究注重语篇建构的主体意识。本文基于系统功能语言学语篇语义观,以同一作者在不同场景下建构的学术语篇为例,探讨作者择用名化表达式建构语篇的理据和制约因素,旨在说明作者的主体意识对语篇建构的作用。一方面,名化表达式能够实现语篇中指称、评价和逻辑推导功能,有助于构建论辩主题、建立评价并展开论证,是作者择用建构学术语篇的重要理据。另一方面,作者择用名化表达式建构语篇受到语域因素的制约,名化表达式是作者实现不同交际目的的修辞手段。
In recent years, systematic functional linguistics has paid attention to the subjective consciousness of discourse construction. Based on the semantic view of systematic functional linguistics, this article takes the academic discourse constructed by the same author in different scenes as an example to explore the rationale and constraints of the author in using the nominalized expression to construct the discourse in order to illustrate the author’s subjective consciousness The role of discourse construction. On the one hand, the nominalized expression can achieve the function of reference, evaluation and logical derivation in discourse, help to construct the subject of argument, establish the evaluation and carry out argumentation, which is an important justification for the author to choose to construct academic discourse. On the other hand, the author chooses the nominal expression to construct the discourse subject to the linguistic factors, and the nominal expression is the author’s rhetoric means to achieve different communicative purposes.