When Bill first started instructing ESL students, he noticed a void in students understanding of grammar. Most ESL teachers spend little time fully explaining the "Eight Parts of English." Some basic parts of English are never learned by most students in foreign countries. Why is that? The answer is rather simple. Most students who study English as a second language, stop studying English at the elementary level. Then there is the competency of the study materials and the teacher who instructs.
Beyond the elementary level is where students begin to study the future and perfect tenses. General grammar terms are rarely taught. General grammar terms like the "Eight Parts of English."