Maidhc is correct. The a is the same in both words. The only difference is the 'z' sound at the end of 'plays' and the 's' sound at the end of 'place'. So:
plays = plaiz
place = plais
In a good dictionary you will see pronunciation symbols (phonemes) after the word you look up, between these marks: / / There is usually an explanation for these near the front of the dictionary.
Anna
www.englishharvest.blogspot.com