A syntax of a major area of Middle English, this book seeks to bridge the gap between philology and linguistics. The historical study of English syntax has suffered from being at the meeting point of two traditions: the philological, which tends to focus on the analysis of texts and to avoid questions of linguistic interpretations, and a more recent linguistic one, which tends to focus on the grammatical systems of languages and often fails to appreciate the limitations of textual evidence and the careful interpretation needed before grammatical account can be based confidently on textual evidence. The work is based on a study of the sermons of John Wyclif, so it is important for students not only of Middle English but also of the history of English, since the author argues that the language of the sermons is important step in the development of Standard English. The book also seeks to demonstrate an appropriate methodology for the writing of linguistically informed grammars of dead languages, and provides a major response to the work of Lightfoot on diachronic syntax.