Examples include:
My daughters' cats smell like feces.
The plural of Inuit can be either Inuit or Inuits. If you are using Inuit as the plural, then the plural possessive is Inuit's; if you are using Inuits as the plural, then the plural possessive is Inuits'.
If you're using persons as the plural of person, then the plural possessive of persons is persons'.If you're using people as the plural of person, then the plural possessive is people's.(People meaning ethnic groups can have a plural peoples.)
Their cat was there on the sofa.There are pictures hanging on their wall.(*Their is the plural possessive, of or belonging to them. There means location or existence.)
The possessive form of the plural noun pharaohs is pharaohs'.example: The pharaohs' mummies are studied by scientists at the university.
The noun person has the plural persons and the plural possessive persons' (e.g. Several persons' bank accounts showed unauthorized activity.)The word people is also a plural or collective form for person, and has the plural possessive people's (e.g. Some people's homes were damaged by the tornado.)
The plural form of the noun office is offices.The plural possessive form is offices'.Example: All of our offices' decor is the same using the company colors.
Toddlers who are very possessive of their toys will eventually learn to share with others. "Ours", "his" and "hers" are examples of possessive pronouns. Dad is quite possessive of his tools and seldom loans them to anyone.
To convert a singular noun into a plural possessive form, simply add an apostrophe after the "s" of the plural form of the noun. For example, "dog" becomes "dogs'" in its plural possessive form.
"Companies" is the plural "company" and doesn't require an apostrophe unless you are using a plural possessive. With the plural possessive, the apostrophe should appear at the end of the word after the 's'.
When referring to a family as the Browns, you would add an apostrophe before the s to indicate the plural possessive form, such as "the Browns' house." If you are simply referring to the family in a non-possessive way, you can just write "the Browns."
Not sure why you need it, but "sister's" is a possessive noun. So it would be a possession of a (a meaning one) sister. I wore my sister's shirt to school. (my sister has a shirt that I wore) Which is different from the possessive plural noun sisters': I went into my sisters' room. (meaning both of my sisters share a room, and I went into it)