The plural is corporations. The plural possessive is corporations' (apostrophe only).
Customers' is the correct plural possessive. Customer's is a singular possessive.
The singular possessive is hostess's; the plural possessive is hostesses'.
The singular possessive form for the noun corporation is corporation's.Example: The corporation's headquarters is located in New Jersey.
The plural possessive form for the noun company is companies'.
The plural form of the noun office is offices.The plural possessive form is offices'.Example: All of our offices' decor is the same using the company colors.
The word zoo's is the singular possessive (refers to one zoo).The plural is zoos and the plural possessive is zoos' (e.g. The zoos' directors agreed to merge them into a single state corporation.)
Singular possessive: secretary's Plural: secretaries Plural possessive: secretaries'
The plural is lads. The plural possessive is lads'.
The plural is relatives. The plural possessive is relatives'.
The plural form is suffixes. The plural possessive is suffixes'.
The plural form is stepsisters. The plural possessive is stepsisters'.
The plural form is Mexicans. The plural possessive is Mexicans'.
The plural form is echoes. The plural possessive is echoes'.
The plural form is inches. The plural possessive is inches'.
Studies' is the plural possessive of study.
The plural possessive is pals'.
Coaster's is singular possessive. The plural is coasters, the plural possessive is coasters'.