The singular possessive form is contralto's.
The singular possessive noun form is trumpet's.
The possessive form of the singular noun soprano is soprano's.Example: The soprano's voice is perfect for this role.
Yes, singer's is the possessive form for the singular noun singer.Example: The singer's performance received high praise.
The genitive singular of all English nouns is formed by adding -'s: piano's
The possessive form of choir is choir's.
The singular possessive form is week's.
The singular possessive form is classmate's.
the possessive plural of contralto is contraltos'.
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 aircraft's.
The singular possessive form is frontiersman's.
The singular possessive form is herd's.