When do you use zoos or zoo's or zoos'?
"Zoos" is the plural form of "zoo," used when referring to more than one zoo. "Zoo's" is the possessive form of "zoo," indicating ownership or association with a singular zoo (e.g., the zoo's entrance). "Zoos'" is the plural possessive form, indicating ownership or association with multiple zoos (e.g., the zoos' conservation efforts).