The plural form for the noun auto is autos. The plural possessive form is autos'.Example: Both of the autos' owners had let their insurance lapse.
The plural form of the noun tree is trees.The plural possessive form is trees'.Example: All of our trees' damage was reviewed by the insurance company.
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 plural form is Mexicans. The plural possessive is Mexicans'.
The plural form is suffixes. The plural possessive is suffixes'.
The plural form is inches. The plural possessive is inches'.
The plural possessive of stepsister is stepsisters'.
The plural form is echoes. The plural possessive is echoes'.
Coaster's is singular possessive. The plural is coasters, the plural possessive is coasters'.
The plural possessive form of "weeks" is "weeks'."