No, only plural nouns and pronouns do.
The plural form of the noun stimulus is stimuli.The plural possessive form is stimuli's.example: All of the stimuli's responses are added to the data file.
The plural form of the noun cross is crosses.The plural possessive form is crosses'.example: All of the crosses' prices are clearly marked.
The plural form of the noun test is tests.The plural possessive form is tests'.Example: All of the tests' resulted will be posted on our website.
The plural form of the noun classroom is classrooms.The plural possessive form is classrooms'.example: All of the classrooms' floors were polished over the holiday.
The plural form of the noun stimulus is stimuli.The plural possessive form is stimuli's.example: All of the stimuli's responses have been negative.
The possessive form of story is story's. "The story's ending was very sad." The plural of story is stories. "I read all the stories in the series." The possessive form of stories is stories' "The stories' endings were all cliffhangers."
The plural form of the noun theory is theories.The plural possessive form is theories'.example: All of his theories' validity is questionable.
The plural form of the noun stimulus is stimuli.The plural possessive form is stimuli's.example: All of the stimuli's responses are added to the data file.
The plural form of the noun cross is crosses.The plural possessive form is crosses'.example: All of the crosses' prices are clearly marked.
The plural form of the noun test is tests.The plural possessive form is tests'.Example: All of the tests' resulted will be posted on our website.
The plural form of the noun classroom is classrooms.The plural possessive form is classrooms'.example: All of the classrooms' floors were polished over the holiday.
The plural form of the noun stimulus is stimuli.The plural possessive form is stimuli's.example: All of the stimuli's responses have been negative.
The plural form of the noun villager is villagers.The plural possessive form is villagers'.example: The tax collector surveyed all of the villagers' fields.
The plural form of the noun committee is committees.The plural possessive form is committees'.Example: All of the committees' reports are due on the tenth.
The plural form of the noun axe (or ax) is axes.The plural possessive form is axes'.Example: All of the axes' weights are stamped on their blades.
The plural form if the noun guides is guides.The plural possessive form is guides'.Example: All of the guides' badges must be worn on their blazers.
The plural form of the noun guy is guys.The plural possessive form is guys'.example: "All of the guys' notebooks were green, and the girls' were blue."