Modification of the Phrase
Composers often seek to modify a phrase in one way or another, sometimes to lengthen it and sometimes to provide other forms of variety.
An extended phrase is one whose length has been increased through the elongation of some part of it. Phrases may be extended by a few beats or up to twice their normal length. The extensions may be near the beginning, in the middle, or near the cadence.
Beginning Extension Phrases may be extended near the beginning by repeating or sequencing a few opening tones. Note that the following phrase would be complete without the bracketed section.
A small melodic group may be repeated in the middle of the phrase to extend its length. The following phrase would be shorter, but nonetheless complete, without the extension.
Elaborating or repeating a cadence, a cadence figure, or individual cadence chords is an effective way in which to extend a phrase. The following phrase would be complete without the cadential extension.
Change of Mode
Phrases are sometimes modified by a change of mode from major to parallel minor or viceversa.