It depends on whether you're talking about one or many years.
One year's passage.
Five years' time.
The plural form for the noun grandmother is grandmothers. The plural possessive form is grandmothers'.
The possessive form is the elders' generosity.
The plural possessive form of "grandparents" is "grandparents'."
The possessive form of the noun grandfather is grandfather's.Example: I'm spending the weekend at my grandfather's farm.
Singular: grandmother's Plural: grandmothers'
The possessive form for the plural noun years is years'.Examples: A six years' relationship is now over.
The possessive form is: two years'example: The renovation is the result of two years' work.
The possessive form is: four years' service
The plural form of the noun year is years.The plural possessive form is years'.example: I have five years' experience as a chicken plucker.
The possessive form of "he" is "his": He did his homework after dinner.
The possessive form of the noun beaver is beaver's.Example: That beaver's lodge has been inhabited for a number of years.
No, it is singular, the possessive form of it is its. The plural form of it is they or them, and the possessive form is their.To answer the question directly: there is no such word as ITS'.
year's leave
The possessive form is lawyer's.
The possessive form is whistle's.
The possessive form is posse's.
The plural form of the proper noun Lewis is Lewises.The plural possessive form is Lewises'.example: The Lewises' children are four and six years old.