Abstract:When learning a third language (L3), learners, according to researchers, generally rely on a variety of resources, such as their L1 (first language), L2 (second language), and/or their current knowledge of the L3. Although studies have identified a number of factors that may influence a learner's choice of the source of transfer, these works were mostly cross-sectional in design and took place within a limited time frame. As a result, temporal change in the use of the prior linguistic resources was poorly documented. Using a case study approach, this article examines one hearing learner's L3 acquisition of ASL, specifically, the motion verbs go and walk, as well as the word orders of their argument structures with goal prepositional phrases over a period of one year. The results show that, over time and influenced by several factors, the learner drew both constantly and differentially on his L1, L2, and his current knowledge of the L3.

中文翻译：

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美国手语动作动词的纵向 L3 习得：先前语言影响变化和持续性的案例研究

摘要：据研究人员称，在学习第三语言 (L3) 时，学习者通常依赖各种资源，例如他们的 L1（第一语言）、L2（第二语言）和/或他们目前对 L3 的知识。尽管研究已经确定了许多可能影响学习者选择迁移来源的因素，但这些工作在设计上大多是横断面的，并且是在有限的时间范围内进行的。因此，先前语言资源使用的时间变化记录不足。本文使用案例研究方法，考察了一名听力学习者在一年内对 ASL 的 L3 习得，特别是运动动词 go 和 walk，以及他们的论点结构和目标介词短语的词序。结果表明，