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Two Five Time
The ii-V chord progression is the cornerstone of jazz. Sometimes the progression includes the I chord (ii-V-I), and sometimes it does not. Here is a list of ii-V-I progressions in all 12 keys. It is important that you (are eventually able to)recognize these instantly at sight:
Note that in the jazz languauge, 7th, ninth, and 13th chords are basically interchangeable. (Bb7=Bb9=Bb13). Watch out for altered chords- flat or sharp nines or fives- those can mean something altogether different...