Secondary Dominant (V of V) I-II7-V-I

Level: IntermediateMode: major
I Cmaj
II7 D7
V G7
I Cmaj

Piano sound loads on first tap. Resolved in the key of C — every chord links to its full analysis.

The classic 'dominant of the dominant'. Raising the supertonic to a DOMINANT 7th (II7) tonicises the V chord — the ear briefly hears V as a temporary key centre before the real dominant resolves to the tonic. A staple of ragtime and show tunes.

What each degree does

ICmaj

Feels like home — complete rest, where the piece departs from and returns to. The major tonic, where everything settles.

II7D7

The V OF V — an applied dominant pushing toward the key's dominant. A major II with a 7th, extra tension before V.

VG7

Tension pulling home — the chord that 'wants to resolve' to I; it closes or opens sections. The dominant, the engine of the key.

ICmaj

Feels like home — complete rest, where the piece departs from and returns to. The major tonic, where everything settles.

More progressions of this level