Various chord progressions with slash chords

Ascending bass

This kind of progression is often used in a prechorus (or "bridge") right before the chorus. The ascending bassline leads to a higher emotional state and often ends with a V7 or V7sus (mostly V7sus9) chord - the sus chords is also written as slash chord here (see lesson slash chords - part 1). This chord then resolves to the first chord of the chorus, where all those emotions can be sreamed out loudly ;-)

Starting from major (or maj7) chord

In some oft the shown progressions you can add a V7sus9 chord by yourself. In G major it's a C/D, in D major it's G/A.

Starting from minor (or minor 7th) chord