The most overlooked chord in the family. 3- shares two of the tonic's three notes and none of its finality — pass through it and a plain 1 → 4 grows a middle chapter.
movesleaving 1 for 3-, only one note moves: the root slips down to the 7solo·singthe key's 7 becomes a RESTING tone over 3- — the one place in this progression it sits stillon recordHey There Delilah — Plain White T's (the 1 ↔ 3- sway)try itAnywhere you sit on 1 for two bars, spend the second bar on 3-.