Syntactic Analysis of the Development and Derivation of Double Copular Constructions

这项研究阐明了双重系词结构的句法特征，它们的独特之处在于它们涉及IS这样的系词序列。具体地说，本研究分析了第二个系词动词被语法化为焦点标记的情况。此外，根据Gelderen(2008)的分析，语法化通常涉及对语义特征的重新分析，本文的分析解释了双COP结构的派生。本文认为，第二类系动词的语义特征在双系结构中被重新分析，从而使系系动词出现在FocusP中，并与后续的小句相连。

This study clarify syntactic properties of double copular constructions, which are unique in that they invlove the sequence of copular verbs like is is. Specifically, this study presents an analysis where the second copular verbs are grammaticalized into focus markers. In addition, following the analysis of Gelderen (2008), where grammaticalization usually involves the reanalysis of semantic features, the present analysis accounts for the derivation of double copular constructions. It is argued that semantic features of the second copular verbs are reanalyzed in double copular constructions, so that the copular verbs appear in FocusP and are adjoined to the subsequent clauses.