First, based on analysis of some—mostly late—Latin texts that positively reflect actual oral delivery, I present some remarks on structure and frequency of Verb-Phrases ‘auxiliary+infinitive’ as arguable markers of ‘orality’ in Latin. Second, I examine the occurrence of these Verb-Phrases in some works by Ambrose of Milan and show that, on the one hand, the investigation of Verb-Phrases might support the view that the De sacramentis and Explanatio symboli are unrevised catecheses, but, on the other hand, it is of no help in the conjecture of the degree of elaboration undergone by those works that, stemming from an oral homiletic delivery, were later revised in view of publication.

中文翻译：

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是否有可能识别“口头”？

首先，基于对正面反映实际口头交往的一些拉丁语文本（大部分为后期语言）的分析，我对动词短语“辅助+不定式”的结构和频率作了一些评论，以作为拉丁语“口头表达”的可争议标记。其次，我研究了米兰安布罗斯某些作品中这些动词短语的出现，并表明，一方面，对动词短语的研究可能支持这样一种观点，即“圣礼”和“解释符号”是未经修订的主题。另一方面，对于那些由于口述的口述交付而后来因出版而被修改的作品的详尽程度的推测没有任何帮助。