Example
The English plural morpheme for nouns has three allomorphs:
(notation in SAMPA)
from: Iggy Roca and Wyn Johnson, a course in phonology, Blackwell, 1999; p. 621
... is located at 40°43'29" North, 73°9'36" West (40.724626, -73.159916)1. According to the United States Census Bureau, the town has a total area of 13.1 km² ...