Chain (ch) Chains form the foundation of rows and give height at beginnings. Animated chain stitch. Public domain via Wikimedia Commons. Yarn over (yo) the hook from back to front. Chain stitch animation shows repeated yarn overs. Pull the yarn through the loop on the hook — you’ve made 1 chain. Hook angle entering the chain. Repeat to your desired length. Keep even tension. Practice smooth, even loops. Quick loops Video: starting a chain (2008, Own work). Next: Single Crochet (sc)