The plural form of sister is sisters.
The word sisters is the plural form; the plural possessive is sisters'.
The word sisters' is plural possessive. The singular is sister, singular possessive is sister's; the plural is sisters, the plural possessive is sisters'.
The plural for sister is sisters.
The plural of sister is sisters.
The plural form for the noun sister is sisters.
The plural is "sisters-in-law."
The plural possessive is twin 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 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."
my sisters schools
step sisters
fathers