Measures 1 to 38A sixteen-measure phrase follows the two-measure introduction. This phrase is divided into three irregular subphrases.
The first subphrase is an eighth measure long and uses only tonic harmony. Note the use of the seventh (C in measure 5) and the major ninth (E in measure 9) over the tonic chord:
The second subphrase in the key of F major (the relative major key) is six measures long:
The third subphrase in the key of A minor is four measures long:
The first phrase, from measures 3 to 19, is repeated in measure 21, but it is transposed a descending fourth. It uses the keys of A minor, C major, and E minor.
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