The singular possessive is cost's (e.g. The cost's increase was staggering.)
The plural is costs. The plural possessive is costs' (apostrophe only).
(e.g. As the prices of raw materials and energy rose, the costs' major impact was on small businesses.)
Singular possessive: secretary's Plural: secretaries Plural possessive: secretaries'
Singular possessive: mother's Plural possessive: mothers'
Niece's is a singular possessive noun. niece - singular nieces - plural niece's - singular possessive nieces' - plural possessive
The singular possessive form is lunch's.The plural noun is lunches.The plural possessive form is lunches'.Examples:He left his lunch's remains on his dresser. (singular)Some of our school lunches' ingredients come from our vegetable garden. (plural)
Examples of possessive forms for singular and plural units of time:an hour's layover (singular)two hours' layover (plural)a year's assignment (singular)two years' assignment (plural)a moment's fright (singular)two seconds' thought (plural)
The singular possessive form of the noun cost is cost's.The plural form of the noun is costs.The plural possessive form is costs'.
Museum is singular. Museum's is singular possessive. Museums is plural. Museums' is plural possessive.
The noun wars is the plural form of the singular noun war.The singular possessive form is war's.The plural possessive form is wars'.Examples:Our city was in ruins by the war's end. (singular)The wars' cost in lives in the twentieth century should never be repeated. (plural)
Singular possessive: secretary's Plural: secretaries Plural possessive: secretaries'
The singular possessive is ant's.The plural possessive is ants'.
The singular possessive is biker's; the plural possessive is bikers'.
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 singular possessive is army's.The plural possessive is armies'.
The singular possessive is avocado's; the plural possessive is avocados'.
Singular possessive: mother's Plural possessive: mothers'
Women's is a plural possessive. The singular possessive is woman's
Niece's is a singular possessive noun. niece - singular nieces - plural niece's - singular possessive nieces' - plural possessive