He obtained his PhD from the National University of Singapore (NUS) in 2001 on an NUS research scholarship. His research interests are in systemic-functional grammar and general linguistics. He is the author of Theme and Rheme: An Alternative Account (2004, Peter Lang) and the co-author of An Introduction to Linguistics (2006, McGraw-Hill). Ludwig Tan teaches at the National Institute of Education, Singapore. He obtained his PhD in Linguistics from Cambridge in 2007 on a National Institute of Education-Nanyang Technological University Overseas Graduate Scholarship. His academic interests include the syntax of Singapore English, phonetics, sociolinguistics, and English grammar and usage. He has co-edited a book on handwriting, Dance of the Pen, published as a limited edition in the UK (2002, Society for Italic Handwriting).