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).  



