Across most languages, verbs produced by agrammatic aphasic individuals are frequently marked by syntactically and semantically inappropriate inflectional affixes, such as Last night, I walking home. As per language production models, verb inflection errors in English agrammatism could arise from three potential sources: encoding the verbs' morphology based on temporal information at the conceptual level, accessing syntactic well-formedness constraints of verbal morphology, and encoding morphophonological form. We investigate these aspects of encoding verb inflections in agrammatic aphasia. Using three sentence completion experiments, it was demonstrated that production of verb inflections was impaired whenever temporal reference was involved; while morphological complexity and syntactic constraints were less likely to be the source of verb inflection errors in agrammatism. These findings are discussed in relation to current language production models.

中文翻译：

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语法失语症中的动词变形：时态特征的编码☆

在大多数语言中，语法失语者产生的动词经常带有句法和语义上不合适的屈折词缀，例如 Last night, I walk home。根据语言产生模型，英语语法中的动词变形错误可能来自三个潜在的来源：基于概念级别的时间信息对动词的形态进行编码，访问动词形态的句法良好性约束，以及编码形态语音形式。我们研究了在语法失语症中编码动词变化的这些方面。使用三个句子完成实验表明，只要涉及时间参考，动词变形的产生就会受到损害；而形态复杂性和句法限制不太可能是语法错误中动词屈折错误的根源。这些发现将结合当前的语言生成模型进行讨论。