Much work on pragmatic markers in the history of English has been devoted to expressions used clause-initially at “left periphery”. By contrast, this study provides an account in broad outlines of the incremental development of pragmatic markers in clause-final “right periphery” position. Particular attention is paid to the rise of comment clauses, question tags, general extenders, and retrospective contrastive markers. Traditional characterizations of pragmatic markers, such as occurrence primarily at left periphery and with prosodic breaks are critiqued.

中文翻译：

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英语从句末语用标记类型的兴起

英语史上关于语用标记的许多工作都致力于研究从句使用的表达方式——最初是在“左边缘”。相比之下，这项研究提供了一个大纲的说明，即在从句末“右边缘”位置语用标记的渐进发展。特别注意评论条款、问题标签、一般扩展和回顾性对比标记的兴起。语用标记的传统特征，例如主要出现在左边缘和韵律中断，受到了批评。