I'm pretty sure that the pattern meant to say " sl 1, yrn, k2tog (slip 1, yarn round needle, knit 2 together)"
You can do this by slip the next st purlwise to the right needle. Then wrap yarn around the right needle one round and proceed to knit the next 2 sts together.
Let me know if you still needed help. Thank you for visiting and question.
Hi, If I started off with 140 stitches, Then I had to knit 5,YO,SSK (k4, yo, ssk) to end of row except last 8stitches, those are knitted. How much should