Crocheting backward is very simple to do, and once you learn it, it will open up more possibilities for your crochet. You can work without turning–great for blankets and other projects that get heavy and annoying to turn– or you can turn your work and have a more uniform look to your stitches. It is also a good technique for creating mirror images.
All you need to do is work from back to front as shown below.
Left-handed crocheters can hover over the pictures for a lefty view.
To start a backward single crochet, with your yarn in front of your work, insert your hook into the next stitch from back to front.