N.W.
V.,
I agree that you should have her speech evaluated-- my 2 1/2 year old has a huge volcabulary and speaks in sentences-- although we have been told his speech skills are well above average. I did want to let you know that my little brother hardly spoke until I went to school. He was almost 3 when I started school and starting speaking more and more because I wasn't there to coddle him.
My other suggestion is to talk to her constantly. At the grocery store, say Look (name) should we get some peanut butter? Ok, let's put it in the grocery cart.
I started doing this when my son was an infant-- I got strange looks-- but he is talking up a storm today.
Good luck.