Within the debate about the heterogeneity of unaccusative structures, the aim of this paper is to distinguish two types of Spanish marked anticausative inherent reciprocals (AIRs) from other syntactic reciprocals (SRs) with se. Several diagnostics show that AIRs such as mezclarse ‘get mixed’ are symmetric, unaccusative, telic, and show causative alternations, while SRs are transitive and vary in their aspectual properties and do not show causative alternations. The en/durante ‘in/for’ adverbials test reveals that there are two types of AIRs: achievements such as casarse ‘get married’, and degree achievements such as mezclarse ‘get mixed’. Although the clitic is an agreement marker in these reciprocal constructions, it is an expletive voice head with casarse, a causative head with mezclarse, and an anaphor merged in the internal argument position in SRs. Differences between AIRs and SRs depend on semantic properties associated to their respective event structures.

中文翻译：

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西班牙语反因果关系的固有倒数和带 Se 的句法倒数*

在关于非宾格结构异质性的辩论中，本文的目的是将两种类型的西班牙语标记的反因果固有倒数（AIR）与其他带有se 的句法倒数（SR）区分开来。一些诊断表明，诸如mezclarse 'get mixed' 之类的 AIR 是对称的、非宾格的、telic 的，并显示出因果交替，而 SR 是传递性的，它们的方位属性各不相同，并且不显示因果交替。en/durante 'in/for' 状语测试显示有两种类型的 AIR：诸如casarse '结婚'之类的成就，以及诸如mezclarse之类的学位成就'混在一起'。尽管在这些互惠结构中，附加词是一个一致的标记，但它是一个带有 casarse 的脏话头，一个带有mezclarse的使役头，以及一个在 SR 中合并到内部论元位置的照应。AIR 和 SR 之间的差异取决于与它们各自的事件结构相关联的语义属性。