The word men is the plural form of the singular noun man.
The possessive form of the singular noun man is man's.
Examples:
The man's hat blew into the street. (the hat of the man, singular)
You'll find men's hats on the second floor. (the hats for men, plural)
The possessive form of the singular noun man is man's.
Example: The man's hat blew off in the wind.
The plural possessive of men is men's.
Example: I like those men's suits.
The singular form is man; the plural noun is men.
Singular possessive of man is man's. The plural possessive is men's.
Men.
Men's
Men's
The possessive form is Amos's.
The singular form is goose; the singular possessive form is goose's.The plural form is geese; the plural possessive form is geese's.
The singular possessive form of county is county's.
Quantum is singular, not singular possessive. The singular possessive form is quantum's.
The singular possessive form is speculum's.
The singular possessive form is frontiersman's.
The singular possessive form is aircraft's.
The singular possessive form is week's.
The singular possessive form is contralto's.
The singular possessive form is herd's.
In English, the possessive form of men is men's. in french, it is homme's or monsieur's. You should find more on Wikipedia under 'Common English Language'.
The singular possessive form is heart's; the plural possessive form is hearts'.