Verbal language skills play an important role in the growth of your child. At the age of 4 your child is big enough to make a few sentences and speak with you about an object.
What you need to know:
Your child needs to talk so strike a conversation with him. Ask him about different things like, 'Does he like an apple, what is the color of his shirt, what is his father’s name?' etc. Encourage verbal language sessions to bring confidence in your child. You should not wait until this happens in school. Give your active participation in improving your kid's vocal skills.