You can purl into the front and back of the stitch--check the glossary under pfb, or you can do a M1purl where you lift the bar between the stitches from back to front and purl into the front loop.
THANK you SO much, Ingrid for this information. I just spent close to 2 hours trying to find info on this particular type of purl inc...including utilizing the search engine here. But after reading your post, I now realize that a big part of the reason why may be because in the particular patt from which I'm knitting, the abbrev used is pfab...and not just pfb...and none of the search engines seem to recognize the former.
And I can't say why I didn't think to remove the "a"...(a DUH! moment for me). While I am no where near the "intermediate-to-experienced" level of this amazing craft, I have been knitting long enough to where I should have known better.
So again, thank you!!! Now I can continue
__________________ God, please grant me the serenity to accept the things I cannot change, the courage to change the things I can, and the wisdom to know the difference.