How to Make a Yarn Over between a Knit and a Purl Stitch
Here’s how to make a yarn over (abbreviated yo) that follows a knit stitch and precedes a purl stitch (which you’d encounter in a pattern as k1, yo, p1):
Knit the first stitch.
Bring the yarn to the front into the purl position, wrap it back over the top of the RH needle, and return it to the front into purl position again.
Basically you’re just wrapping the yarn once around the RH needle from the front.
Purl the next stitch (see the following figure).