+Subdivisions and Modifications after the Sentence+.—Teachers familiar with text books that group all grammatical instruction around the eight parts of speech, making eight independent units, will not, in the following lessons, find everything in its accustomed place. But, when it is remembered that the thread of connection unifying this work is the sentence, it will be seen that the lessons fall into their natural order of sequence. When, through the development of the sentence, all the offices of the different parts of speech are mastered, the most natural thing is to continue the work of classification and subdivide the parts of speech. The inflection of words, being distinct from their classification, makes a separate division of the work. If the chief end of grammar were to enable one to parse, we should not here depart from long-established precedent.
+Sentences in Groups—Paragraphs+.—In tracing the growth of the sentence from the simplest to the most complex form, each element, as it is introduced, is illustrated by a large number of detached sentences, chosen with the utmost care as to thought and expression. These compel the pupil to confine his attention to one thing till he gets it well in hand. Paragraphs from literature are then selected to be used at intervals, with questions and suggestions to enforce principles already presented, and to prepare the way informally for the regular lessons that follow. The lessons on these selections are, however, made to take a much wider scope. They lead the pupil to discover how and why sentences are grouped into paragraphs, and how paragraphs are related to each other; they also lead him on to discover whatever is most worthy of imitation in the style of the several models presented.
+The Use of the Diagram+.—In written analysis, the simple map, or diagram, found in the following lessons, will enable the pupil to present directly and vividly to the eye the exact function of every clause in the sentence, of every phrase in the clause, and of every word in the phrase—to picture the complete analysis of the sentence, with principal and subordinate parts in their proper relations. It is only by the aid of such a map, or picture, that the pupil can, at a single view, see the sentence as an organic whole made up of many parts performing various functions and standing in various relations. Without such map he must labor under the disadvantage of seeing all these things by piecemeal or in succession.
But, if for any reason the teacher prefers not to use these diagrams, they may be omitted without causing the slightest break in the work. The plan of this book is in no way dependent on the use of the diagrams.
+The Objections to the Diagram+.—The fact that the pictorial diagram groups the parts of a sentence according to their offices and relations, and not in the order of speech, has been spoken of as a fault. It is on the contrary, a merit, for it teaches the pupil to look through the literary order and discover the logical order. He thus learns what the literary order really is, and sees that this may be varied indefinitely, so long as the logical relations are kept clear.
The assertion that correct diagrams can be made mechanically is not borne out by the facts. It is easier to avoid precision in oral analysis than in written. The diagram drives the pupil to a most searching examination of the sentence, brings him face to face with every difficulty, and compels a decision on every point.
+The Abuse of the Diagram+.—Analysis by diagram often becomes so interesting and so helpful that, like other good things, it is liable to be overdone. There is danger of requiring too much written analysis. When the ordinary constructions have been made clear, diagrams should be used only for the more difficult sentences, or, if the sentences are long, only for the more difficult parts of them. In both oral and written analysis there is danger of repeating what needs no repetition. When the diagram has served its purpose, it should be dropped.
SUGGESTIONS FOR COMPOSITION EXERCISES
The exercises in composition found in the numbered Lessons of this book are generally confined to the illustration and the practical application of the principles of the science as these principles are developed step by step. To break up the continuity of the text by thrusting unrelated composition work between lessons closely related and mutually dependent is exceedingly unwise.
The Composition Exercises suggested in this revision of "Graded Lessons" are designed to review the regular Lessons and to prepare in a broad, informal way for text work that follows. But since these Exercises go much farther, and teach the pupil how to construct paragraphs and how to observe and imitate what is good in different authors, they are placed in a supplement, and not between consecutive Lessons of the text.