The advantages and weaknesses of conventional grammar and structural linguistics are the subjects of this pamphlet. Reasons given for the widespread attack on conventional grammar are that it has resulted in repetitive and time-consuming instruction, has not improved the students' language skills, has been confused with language usage, and does not accurately describe present-day English. However, certain concepts associated with conventional grammar (logical sentence completeness, modification and subordination, coordination and parallel construction, basic sentence patterns, and simplified sentence diagraming) are shown to be applicable in preventing some serious errors in expression. An examination of the concepts of structural grammar draws attention to the structuralists' emphasis on the spoken language and to the ways that intonation can be a guide to punctuation. (JS)