Abstract We provide a snapshot of childhood morphology development in our investigation of two profiles of bilinguals (age 9–10) in an English-Spanish dual immersion academic setting: Spanish heritage language (SHL, n = 21) and second language (SL2, n = 41) children. Three tasks were given to the 62 bilinguals and 15 age-matched controls (Spanish first language, SL1): oral comprehension of 20 singular-plural present verbs, written sentence production of 10 similar verbs, and a meaning-focused writing task. SHL children were comparable to controls in production of number agreement, and showed no asymmetry between comprehension and production. SL2 learners showed lower accuracy than both SHL and SL1 children. A similar pattern was observed when person agreement and tense, aspect, mood and vowel errors were considered. The most common error among SHL and SL2 children was overregularization of stem vowels, a typical developmental error. The Feature Reassembly model of grammar can accommodate the range of possibilities represented by the data we present.

中文翻译：

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双沉浸中西班牙语HL和L2儿童的现在时动词形态

摘要 我们在英西双语浸入式学术环境中对两种双语者（9-10 岁）的调查提供了童年形态发展的快照：西班牙传统语言（SHL，n = 21）和第二语言（SL2，n = 41) 儿童。给 62 名双语者和 15 名年龄匹配的对照（西班牙语第一语言，SL1）分配了三项任务：20 个单复数现在动词的口语理解、10 个类似动词的书面句子生成以及以意义为中心的写作任务。SHL 儿童在数字一致性的产生方面与对照组相当，并且在理解和产生之间没有表现出不对称。SL2 学习者的准确率低于 SHL 和 SL1 儿童。当考虑人的一致性和时态、体位、情绪和元音错误时，观察到类似的模式。SHL 和 SL2 儿童中最常见的错误是词干元音的过度规范化，这是一种典型的发育错误。语法的特征重组模型可以适应我们提供的数据所代表的可能性范围。