Pragmatics in the History of English. Cambridge: Cambridge University Press, 2023. https://doi.org/10.1017/9781009322904
The Evolution of Pragmatic Markers in English: Pathways of Change. Cambridge: Cambridge University Press, 2017. xiv + 331.
The Comment Clause in English: Syntactic Origins and Pragmatic Development. Studies in English Language. Cambridge: Cambridge University Press, 2008. xvii and 280 pp.
Lexicalization and Language Change. Co-authored with Elizabeth Closs Traugott. Cambridge Research Surveys in Linguistics. Cambridge: Cambridge University Press, 2005. xii and 207 pp. Hardback and paperback.
Japanese translation by Sukenari Hino. Tokyo: Kysuhu University Press, 2009.
Chinese translation by Luo Yaohua, Zheng Youjie, Fan Chengcheng and Chai Yanja. Beijing: Commercial Press, 2013. With new preface.
Korean translation by Choe Jeon-Seung and Hyeong Guk Seo. Seoul: YukRack Publishing Co., 2016.
Pragmatic Markers in English: Grammaticalization and Discourse Functions. Topics in English Linguistics 19. Ed. Herman Wekker. Berlin and New York: Mouton de Gruyter, 1996. xvi and 412 pp.
The Development of English Aspectual Systems: Aspectualizers and Post-verbal Particles. Cambridge Studies in Linguistics 49. Cambridge: Cambridge University Press, 1988. xii and 307 pp. Digitally reprinted in 2009.