My DD will be 2 in a few weeks and we've had this questionnaire through from the HV. A couple of the questions are about her use of I/me/you which DD doesn't do. She will say 'Mummy do it' instead of 'You do it' or 'Her name hold it' instead of 'I hold it' etc.
It doesn't really work trying to show her because if I say you do it, I want her to say I do it but she will just copy me like usual and said you do it 
It feels a bit early to be worrying about it but as it was on the questionnaire thing I thought I would try.
Would love to hear how others did this!