I - IV - V and I - IV - V7 progressions
The I - IV - V progression is the most common of all chord progressions. It is used in heaps of songs, either as the complete progressions or as a part of it. The I - IV – V is sooner or later prolonged to I - IV – V – I which include the “home chord” since the V built tension that wants to resolved in the I chord.
The last part (V - I) is also called a perfect cadence (a cadence is an old term that refers to a sequence of chords that ends a phrase or section a music piece).
So, to translate the roman numerals to “real” chords, here are some examples:
I - IV - V = D - G - A
I - IV - V - I = D - G - A - D
I - IV - V7 = D - G - A7
These chords can be seen in the Bob Dylan song “Mr Tambourine Man”:
The first verse starts with I - IV - V:
D [intro] (G)Hey! Mr. (A)Tambourine Man, (D)play a song for (G)me
… and concludes with I - IV - V - I:
In the (D)jingle jangle (G)morning I'll come (A)following (D)you.
The chords: D, G, A
I - IV - V progressions in all keys
The progression and how it is played in all musical keys:
I - IV - V7 progressions in all keys
The progression with a dominant 7th as the V chord in all keys:
I - IV - V7 progression with substitutions
The progressions must not include ordinary major and dominant 7th chords. The chords in it can be substituted in many ways. Some examples of this:
C – Fmaj7 – G9
E – Amaj7 – B7
Amaj7 – Dmaj9 – E13
D - Dsus4 - C - F
G – Csus4 – D7
In addition, other options such as bass lines can be added:
C - C/E - F - G
G - G/B - C - D
ii - V - I in minor keys
The ii - V - I structure can transpose into minor (becoming for example ii - V - I) with some new chord types.
Am7b5 - Dm7 - Gm7
Bm7b5 - Em7 - Am7
Dm7b5 - G7 - CmM7
Gm7b5 - C7 - FmM7
For more information about I - IV - V and other progressions, see the 500 Guitar Chord Progressions ebook. It will give you a deeper insight about how chord progressions can be constructed.
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