redsales: The most important thing would be facial expression. Lots of smiles and encouragement. Pictures would help a lot, as well as hand signals and acting out things.
Also finding her a buddy, someone her own age who can help her.
My son had a Turkish boy start in his class who couldn't speak a word of English. My lad was asked to stick to him like glue and help him as much as he can. The lad soon picked up the language, and they managed to communicate mostly through acting things out, and loads of patience from both of them.
Hope that helps a bit! Good luck :O)