the way I learned it was in choir as a practice it went like this:

Rufus Rastus Johnson-Brown
oh, whatcha gonna do when the rain comes down
whatcha gonna do and whatcha gonna say
if you can't pay the rent til' the rain goes away?
oh, you know and I know and everybody knows
that you can't pay the rent if you ain't got the dough
so, Rufus Rastus Johnson-Brown
watcha gonna do when the rain comes down?