Hmm... well ...
Stockinette and reverse alternate knit and purl between rows ... knit row 1, purl row2, knit row 3, purl row 4 ...
Ribbing is alternating knit & purl within the row as well as between the rows...
Row 1 - k3, p1, k3, p1, k3, p1, k3
Row 2 - k1, p1, k3, p1, k3, p1, k3, p1, k1
This is the ribbing pattern on the sweater that I'm making now
Hmm... does that make sense? :?