The word zoo's is the possessive form of the singular noun zoo.
The plural noun is zoos.
The plural possessive form is zoos'.
Example: Many zoos' habitats have improved over the past decade.
Years'
Uncles'
Painters'
The plural possessive of region is regions'.
The plural of zoo is zoos. The plural possessive form of zoos is zoos'.
The plural form of the noun lynx is lynxes.The plural possessive form is lynxes'.
The plural posessive form is nests'.
singular
The plural form for the noun louse is lice; the plural possessive is lice's.
The knife's edge had been dulled when it hit the rock. Knife's is singular posessive. The knives' edges had been dulled when they hit the rock. Knives' is plural posessive.
The plural form for the noun zoo is zoos.
Waitresses.