my 2year 6months old son doesn't speak much. he is unable to make sentences but he clearly speaks too many words. he can sing rhymes, numbers and alphabets also but he lacks social verbal communication. but he make us understand him with non verbal communication... he understands us but never initiate talks... m worried when he will start speaking. he does not have symptoms of autism or hearing problem.. plz suggest something n plz share similar experiences. thnks alot