This is the first volume of a contrastive analysis of English and Vietnamese in the light of a combined tagmemic and transformational approach. The dialects contrasted are Midwest Standard American English and Standard Saigon Vietnamese. The study has been designed chiefly for pedagogical applications. A general introduction gives the history of the Vietnamese language, discusses theoretical questions in regard to constrastive analysis as well as general questions of linguistic behavior. A further introductory chapter discusses the grammar discovery procedures used for the study, concentrating on the manner in which tagmemics and transformational generative grammar have been combined. The bulk of the study is then concerned with the grammar of English. Chapters deal with: independent declarative clause types, clause classes, internal structures of clause-level tagmemes, linking tagmemes and cross-level constructions, English sentence types and sentence level structures. An appendix provides a twenty-one page outline of grammatical structures in English. (FWB)