The plural form of criterion is criteria.
The plural of wife is wives.
The plural possessive form of wives is wives'(apostrophe after the S).
The singular possessive form is wife's.
The plural form of the noun louse is lice.
The singular possessive form is foot's.
Quantum is singular, not singular possessive. The singular possessive form is quantum's.
"Am" is the first person singular form of the verb "to be". "Are" is the first person plural form ("are" is also the second person singular and plural, and the third person plural).
The singular possessive form of wife is wife's.
Example: My wife's name is Elizabeth.
The plural form for the noun louse is lice; the plural possessive form is lice's.
he is the king of dictionopolis
The plural form for the noun foot is feet; the plural possessive form is feet's.
Example: The feet's injuries were minor.
The singular possessive form for the noun elf is elf's.
Example: The elf's gift was a bouquet of buttercups.
The plural form for the noun elf is elves; the plural possessive form is elves'.
Example: The elves' picnic was a lot of fun.
The plural form for the noun tooth is teeth.
The plural possessive form is teeth's.
Example: This product will improve your teeth's whiteness.
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.
The possessive form of the singular noun representative is representative's.
example: The representative's appointment is at four.
The singular noun is tooth.
The singular possessive noun is tooth's.
The plural form of the noun pant (a short quick breath) is pants.
The plural possessive form is pants'.
Example: His pants' quickness told me that he had run far.
The noun pants (a garment) is a shortened form of a pair of pants.
The plural form is pairs of pants. The plural possessive form is pairs of pants'.
Example: These pants' prices are out of my range.
The plural of foot is feet
The possessive form of the singular noun louse is louse's.