第六课：第二转位的三和弦

While composers use root position and first inversion triads freely, second inversion usually occurs in three situations.
（基本音位和第一转位的三和弦可以自由运用，而第二转位经常在三种情况下使用）

Like first inversion, second inversion may be used to smooth out a bass line.
（和第一转位的运用相同，第二转位也可以平滑低音线）
Look at this example – notice the movement of the bass line.
（看这个例子，注意它的低音线） |
By using a second inversion V chord, the bass line moves by step and becomes smooth.
（将V变为其第二转位，低音线就变成了级进方式，更加平滑） |
A second inversion triad used in this fashion is called a passing six-four chord.
（以这种方式使用的三和弦的第二转位叫通过音第二转位）

On the chord progression chart, the cadential six-four occurs in between predominants and dominants.
（在和弦进行表中，终止第二转位位于属音和前属音之间）