The possessive form for her sister-in-law is her sister-in-law's.
Example: She borrowed her sister-in-law's car.
The possessive of sisters-in-law (a plural possessive) is sisters-in-law's.The singular possessive would be sister-in-law's.example: All of my sisters-in-law's children are girls.
The plural of the noun sister-in-law is sisters-in-law.The plural possessive is sisters-in-law's.Example: "Both of my sisters-in-law's cars were in my driveway."
The plural form is sisters-in-law.The plural possessive is sisters-in-law's.Example: All of my sisters-in-law's children are boys.
Sisters-in-law is a plural noun referring to more than one sister-in-law.The possessive form of this plural noun is sisters-in-law's.
The word sisters is the plural form; the plural possessive is sisters'.
The plural form of the noun sister is sisters.The plural possessive form is sisters'.example: The sisters' names are Hope and Faith.
The possessive form of the plural noun sisters is sisters'.Example: My sisters' names are Laverne and Shirley.
The plural possessive form is fathers-in-law's.
The possessive form for the plural noun brothers-in-law is brothers-in-law's.Example: I had the work done at my brothers-in-law's body shop.
The possessive form of the plural noun sons-in-law is sons-in-law's.example: Both of my sons-in-law's birthdays are on the same day.
The plural form of the singular noun sister is sisters.The plural possessive form is my sisters'.Example: My sisters' names are Laverne and Shirley.
The noun 'sister' is not plural and is not possessive.The plural form is sisters.The possessive form is sister's.The plural possessive form is sisters'.