There are two accepted forms for possessive singular nouns ending in s:
Add an apostrophe (') after the existing s at the end of the word: Russ'
Add an apostrophe s ('s) after the existing s at the end of the word: Russ's
Examples:
Russ' bicycle is new.
Russ's bicycle is new.
The singular possessive form of "Russ" is "Russ's."
The singular possessive form of "Jewess" is "Jewess's."
The singular possessive form is week's.
The singular possessive form of "classmate" is "classmate's."
The singular possessive form of "gypsy" is "gypsy's."
The singular possessive form of county is county's.
The singular possessive form of "Jewess" is "Jewess's."
plural possessive form: babies' singular possessive form: baby's
The singular possessive form is evening's. The plural possessive form is evenings'.
The singular possessive form is mother's.The plural possessive form is mothers'.
sculpture's
The plural of porch is porches.
The possessive form of the singular noun judge is judge's.Example: The witness had the judge's complete attention.
The singular form of the plural noun geese is goose.The singular possessive form is goose's.example: The boy found a goose's feather and stuck it on his hat.
The singular possessive form is week's.
The singular possessive form of "classmate" is "classmate's."
The singular possessive form for the noun neighbor is neighbor's trash.The plural form is neighbors. The plural possessive form is neighbors' trash.
The possessive form is Amos's.