ELD Grammar is a four-level course that describes the structure of English speech--from parts of speech to the syntax of sentences. It explains how and why we combine words into phrases, and phrases into sentences. We discuss noun dichotomies, verb tenses and aspects, degrees of comparison of adjectives and adverbs, as well as sentence taxonomies. Accurate grammar allows the speaker to express his or her ideas precisely and beautifully, with subtle nuances and metaphorically. It is a mystery to be solved!