2yrs 12 months baby not communicating.

2 yrs 12 months old Other development and milestones achieved on time Identifying all the objects, places and answering for all what questions Telling rhymes ,alphabets, numbers , counting , shapes and colours Repeating all the words if we tell Responding to name and instructions Calling Amma Appa grandparents and asking water in need Problem Distractions Not sitting at one place for more than 5 mins in home but she understands n sits according to the places in flights she is sitting Not initiating and communicating the real sentences And if she is concentrating on thing she is not answering for our questing while playing . Is it normal ! When can I expect her to speak real time conversations and she has been put up in pre school also