At this stage, your child understands what is right and what is wrong. Though she may not really know how to express but she can differentiate what she feels is right or wrong. You might have started training your princess on moral discipline but it is not really needed.
What you need to know
At this point, you need to understand that your sweetie pie understands right and wrong and you just need to guide her. Rather than being strict you can be firm and loving to her. Criticize the action and not your child. Don’t ever say, 'You bite and so you are a bad kid,' instead you should say, 'Biting is a bad habit.' Be a role model for the behavior you want your angel to develop. Remember to give her respect. Always use 'please' and 'thank you' to your little princess and ask her to use the same language. Try explaining the consequences of her actions. Don’t encourage arguments, rather sit calmly and discuss with her. Reinforce positive behavior and encourage sharing toys, books, games with friends, siblings which will strive her in understanding other’s emotions and better behavior with the world around her.