Thai Reference Grammar was written to meet the need of students and teachers of the Thai language for information on advanced sentence structure. The book is divided into chapters based on common grammatical-structural categories. There are over 500 separate topics, and the most important feature is the sample sentences for each topic, of which there are over 2,000. These sentences are not stuffy, old-fashioned grammar examples, but samples of typical, idiomatic spoken Thai. The authors, an American and a Thai both with advanced degrees in linguistics and language teaching, analysed thousands of Thai sentences to formulate clear and concise explanations for all the important sentence patterns of the Thai language. Examples are given in both Thai script and transliterated Thai, written in the English alphabet with no special phonetic symbols. Tones are marked with a special font that shows the level of the sound of each word, essential to pronunciation in tonal languages like Thai. Originally published in 2001, Thai Reference Grammar is now in its fourth printing.