It is never too early to start talking to your child. All your child needs to survive is learnt under your tutelage first. It is important that you set aside a lot of time to just speak to your child. Use his or her name frequently in the course of the conversation to help the child identify the name as his or her own.
One way of teaching new words is to point out things that inhabit your child’s world. Toys, food and drink, people’s names, friends, are the easiest to teach. You can go a step further and teach your child the names of flowers, plants, trees, birds, and animals when you are out on your daily walk or at a picnic in the park.