Nils Bastedo, Harvard class of 1995 (with honors) and former English Instructor at Bumrungrad International Hospital, the world's largest international hospital (Bangkok, Thailand) has written a book to facilitate teaching and learning of the English tenses.
Understanding and using the tenses correctly is essential not only for anyone who wishes to sound professional, but also to avoid simple misunderstandings in normal conversational English. Grammar should be an aid in practical application, not an end in itself, used for academic tests only.
This book makes learning the English tenses and distinguishing them from each other easy. The simple 3-step teaching method outlined in the book has already helped several English teachers and hundreds of adult students at Bumrungrad International.