Slash chord G/C

An eighties song uses several slash chords which creates a sound I yearn. There are several examples most of which I can replicate, but G/C I am struggling with. How can I create it in Hookpad?

what key are you in? Try making it a sus4 in first inversion?


I was in the key of C Major.
There is something uncanny about a Waterboys song - Whole of the Sun.
Lyric-wise there is just one stand-out line, “I saw the Crescent, You saw the whole of the moon.”
Nonetheless, their propensity to use slash created a texture I wanted to add to my songs.
So have written a song without G/C, but even so, that irresistable je ne sais quoi feel came through.
Thanks for solving my issue Dave.