挑战语言学中'真正空成分'假说，提出无需引入新概念即可解释相关语法现象。
On true empty category
- 用句法位置的范畴和格特征解释空成分，无需引入全新类型
- 通过话题化现象分析，证明现有理论可完全解释相关数据
- 适合对生成语法与普遍语法感兴趣的读者
根据乔姆斯基（1981, 1986）的观点，空成分包括PRO、pro、trace和变量。然而，某些空宾语位置似乎与现有空成分不相容。为此，李（2007a, 2007b, 2014）及李与魏（2014）提出‘真正空成分’假说，认为真正空成分仅是具有范畴和格特征的空位置，主要用于满足动词的配价要求。该假设颇具创意，若成立，将对普遍语法研究产生深远影响。本文评估其在话题化现象中的证据，表明这些现象无需引入真正空成分即可得到解释。
原文摘要 · Abstract (English)
According to Chomsky (1981, 1986), empty categories consist of PRO, pro, trace, and variable. However, some empty object positions seem to be incompatible with extant empty categories. Given this, Li (2007a, 2007b, 2014) and Li & Wei (2014) raise the true empty category hypothesis, which holds that true empty category is only an empty position with category and Case features. As a last resort option, it is used mainly to meet the subcatgorization of a verb. This assumption is ingenious, and if proved to be true, it will exert a great impact on the study of UG. In this paper, we evaluate their evidence from topicalization and demonstrate that it can be accounted for without invoking true empty category.
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