​Apostrophes

Possessive Case

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The possessive case of a noun or a pronoun shows ownership or possession.

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EXAMPLES

Jorge’s calculator has a solar battery.

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Pam’s aunt is a plumber.

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​To form the possessive of most singular nouns,

add an apostrophe and an s.

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EXAMPLES

Barbara’s house one boy’s uniform

a week’s salary that stereo’s speakers

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​To form the possessive case of a plural noun ending in s, add

only the apostrophe.

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EXAMPLES

cats’ owners cities’ problems

coaches’ records princesses’ duties

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​The few plural nouns that do not end in s form the possessive case

by adding an apostrophe and an s.

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EXAMPLES

geese’s migration children’s stories