This is hard to describe but sometimes the first loop on a row will be “dropped”–the loop is just hanging out by itself and doesn’t have its yarn “leg” running through it, so I can’t start the next row and I don’t know how to fix it. Does this make sense? I am a new knitter.
At the end of a row is somewhat easy fix. You just need to use a crochet hook or cable holder and knit or purl the end stitch back on the needle.Use the yarn from the previous stitch or frog until you get to the row where you dropped the stitch and knit or purl it back onthe normal way. If it is only a couple of rows I would frog it but more than that I would hook it up until you are back on track. I hope this doesn’t confuse you.