This first book in a series, English Structure, covers the different parts of speech and their roles in sentences. Students will learn how to diagram sentences, a task which graphically makes evident common errors such as writing sentence fragments, confusing the pronouns OIO and OmeO, and using adjectives when adverbs are appropriate. Not all students will need this volume. Those who have read widely and well, or who already achieved a good grasp of grammar, may prefer to proceed directly to the next volume, Usage.