Grammar by Diagram, second edition is a book designed for anyone who wishes to improve grammatical understanding and skill. Using traditional sentence diagraming as a visual tool, the book explains how to expand simple sentences into compound, complex, and compound-complex sentences, and how to employ verbals (infinitives, gerunds, and participles) and other structures for additional variety.

Lexicalization, a process of language change, has been conceived in a variety of ways. In this up-to-date survey, Laurel Brinton and Elizabeth Traugott examine the various ideas that have been presented. In light of contemporary work on grammaticalization, they then propose a new, unified model of lexicalization and grammaticalization. Their approach is illustrated with a variety of case studies from the history of English, including present participles, multi-word verbs, adverbs, and discourse markers, as well as some examples from other Indo-European languages

The book introduces basic concepts of grammar in a format which inspires the reader to use linguistic arguments. The style of the book is engaging and examples from poetry, jokes, and puns illustrate grammatical concepts. The focus is on syntactic analysis and evidence. However, special topic sections contribute sociolinguistic and historical reasons behind prescriptive rules such as the bans on split infinitives, dangling participles, and preposition stranding. The book is written for undergraduate students and structured for a semester-long course.