The possessive form for the noun boat is boat's.
Example: The boat's sail was blue and white.
The possessive form for the singular noun relative is relative's.Example: I borrowed my relative's boat for the afternoon.
The singular possessive form is week's.
The singular possessive form is classmate's.
The possessive form is Amos's.
The singular possessive form for the noun gypsy is gypsy's.
The singular possessive form for country is county's.
The singular form for the plural noun countries is country; the singular possessive form is country's.
singular possessive: boy'splural possessive: boys'
The singular possessive form is speculum's.
The singular possessive form is contralto's.
The singular possessive form is frontiersman's.
The singular possessive form is aircraft's.