Cadences

ok well working from the basics ,

perfect cadance V to I

Imperfect cadence I to V

plagual cadence IV to I

and interupted cadence V to VI

these building blocks alone provide many possibilties don't they ?

let's play with perfect cadence
Well we Can alter and twist the V chord to oblivion one idea which has not been discussed yet is good old augmented chords you know G aug EADGBE:32100X
you can work this with G whole tone scale mmmm tasty !

then you can try the tritone substitution replace V with bII
i know the Db maj 7 has been discussed (modal interchange , thanks for that )
but let's stay with whole tone theme so we could try and Db aug going to C

Something which crops up in a james bond song (a great place to learn cool chord sequences ) is Vm7 - I
so Gm7 to C
thats a really mellow ending .