Читать книгу Music: An Art and a Language - Walter Raymond Spalding - Страница 16

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In this beautifully constructed twelve-measure sentence we have the main motive of the entire movement set forth in measures 1 and 2; then a contrasting secondary motive in measures 3 and 4. The second four-measure phrase, i.e., measures 5, 6, 7 and 8, repeats the material exactly, but with a modulation into the relative major. In measures 9 and 10 we find the secondary motive appearing in the alto voice (which should be brought out in performance), and in measures 11 and 12 a free ending in the relative major. The closing measures, 13 and 14, give an echo-like effect, which will be explained when we come to extended sentences. Such a sentence is not to be considered as one of 14 measures, although the literal counting gives that number; for the first complete cadence occurs in the 12th measure at the end of the third four-measure phrase; the remaining measures being supplementary.[59]

The last type of simple, normal sentence is that of 16 measures, divided into 4 phrases of 4 measures each. A clear distinction must be drawn between two successive sentences of 8 measures and the long sweep of a genuine 16 measure sentence. In the latter case there is no complete and satisfactory stop until we reach the cadence in the 16th measure.