yfwd & knit

Question: How do I knit 1 yfwd knit 12 yfwd k1?

Answer: First you knit a stitch, then you bring yarn to front of work and knit the next st with yarn over right needle, knit the next 11 sts as usual, then bring yarn to front of work again and knit the next stitch with yarn over the right needle.

Please see my video on How to knit yfwd, k3 for an example.