It also helps to demonstrate sharing behavior. For example, you've just cut an apple in half. There are things that I don't have to share. If there are other children in your home, your child may need to learn sharing more quickly. Be sure she has some things that are just for her, that she does not have to share.
Real sharing is a grown-up behavior.
Your toddler will need a lot of help from you to learn to share. Be patient and don't expect true sharing until your young one is older. I'm beginning to use one hand more than the other. When things don't go the way I want,I get angry. I'm learning to creep backward downstairs.