The plural form is mistresses.
The plural possessive form is mistresses'.
Examples: I put the mistresses' mail on her desk.
Singular possessive: secretary's Plural: secretaries Plural possessive: secretaries'
The plural is relatives. The plural possessive is relatives'.
The plural is lads. The plural possessive is lads'.
The plural form is echoes. The plural possessive is echoes'.
The plural form is suffixes. The plural possessive is suffixes'.
There is no apostrophe at the end of the word mistress. An apostrophe goes at the end of PLURAL possessives ending in -s, not singular ones. The possessive singular of mistress is mistress's, and the plural possessive is mistresses'.
The plural form of the compound noun 'lady in waiting' is ladies in waiting.The plural possessive form is ladies in waiting's.Example: The ladies in waiting's duties include managing the correspondence of the mistress.
Singular possessive: secretary's Plural: secretaries Plural possessive: secretaries'
The plural is lads. The plural possessive is lads'.
The plural is relatives. The plural possessive is relatives'.
The single possessive form of "mistress" is "mistress's." This form indicates that something belongs to or is associated with one mistress. For example, you might say, "The mistress's house is beautiful."
The plural form is suffixes. The plural possessive is suffixes'.
The plural form is stepsisters. The plural possessive is stepsisters'.
The plural form is Mexicans. The plural possessive is Mexicans'.
The plural form is echoes. The plural possessive is echoes'.
The plural form is inches. The plural possessive is inches'.
Studies' is the plural possessive of study.