My child is 4 years old.He stills do not speak some Letters like R,ga and 2 more letters.He is talking with sticking his tongue out.Doing so ,he is not able to pronounce correctly .Can any one tell how to get rid of this?

A. to improve speech -read different books to the child -talk to the child daily routine like the child understands you with regular eye contact -singing songs and rhymes -while talking repeat what your child says with right pronunciation and do not criticize sthe child -avoid screen time(tv mobile laptop). leave permit the child to watch the activities that allow to improve his language -take your child outside (open environment) and have a talk with thed child regarding the things around the child -introduce new words gradually for proper understanding -speak about things child is interested in.