Hi I am knitting a pattern that has a recurring pattern which starts p1 yrn p2 pass the yrn over the last p2. I have worked this out but I have come to the decreasing part and it says decrease 1 stitch at each end of the row while keeping the pattern correct. the 1st row starts p1 then yrn. If i have decreased one that means the row starts with a yrn as the 1st thing, how do i do this as the yarn is still on the left needles not the right as i havent started with a p stictch, help!!