On the Use of Apostrophes
Correct Use of Apostrophes
In standard contractions:
it’s (it is), who’s (who is), can’t (cannot)
With nouns to show possession:
SINGULAR NOUNS: user’s response, witness’s account
PLURAL NOUNS: writers’ terminals, children’s web site
Incorrect Use of Apostrophes
In possessive pronouns:
its (not it’s), whose (not who’s), ours (not our’s)