This contrastive analysis of English and Thai is designed to introduce ESL teachers to many of the differences between Thai and English. The material is intended to assist the teacher in defining the problems that Thai speakers are likely to have in learning English. The introduction includes background information on Thailand and its people. Part one deals with phonology, including segmental and suprasegmental features. Part two deals with morphology, part three with sentence structure, part four with verb phrases, and part five with non phrases. Part six discusses vocabulary problems Thai speakers encounter in learning English. (AM)