The impersonal verb custar (lit. ‘cost’) in European Portuguese selects for a dative experiencer argument and an infinitival clause, which may be preceded by the preposition a . Interestingly, a reflexive clitic co-referential with the experiencer argument can be deleted (under conditions to be specified) if it is within the prepositional infinitival complement, but not within its prepositionless counterpart. We argue that the presence of the preposition a preceding the infinitival complement of custar correlates with obligatory control and show how deletion of reflexive clitics within the prepositional infinitivals can be captured under the movement theory of control ( MTC ; see e.g. Hornstein 1991, 2001; Boeckx, Hornstein and Nunes 2010). More specifically, we show that if the infinitival subject is a deleted copy left by the “controller”, this copy can trigger deletion of the reflexive clitic as a way to satisfy a superficial ban on morphologically identical clitics in a local domain.

中文翻译：

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MTC帐户使用欧洲葡萄牙语中的动词Custar删除反身论调

欧洲葡萄牙语中的非人格动词custar（lit.'cost'）选择了亲属经验论者的论点和不定式从句，其后可以加上介词a。有趣的是，如果它位于介词不定式的补语之内，但不在其无介词的对应语之内，则可以删除（在指定条件下）与体验者自变量的反身气候共指。我们认为介词不定式之前的介词a的存在与强制控制相关，并表明如何根据控制的运动理论捕捉介词不定式中反身气候的删除（MTC；参见例如Hornstein 1991，2001; Boeckx ，Hornstein和Nunes，2010年）。更具体地说，我们表明，如果不定式主题是“控制器”留下的已删除副本，