Apostrophes’ 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:       users’ responses, witnesses’ accounts

SINGULAR NOUNS:  writer’s terminal, child’s drawing
PLURAL NOUNS:       writers’ terminals, children’s drawings

Incorrect Use of Apostrophes

In possessive pronouns:

its  (not it’s)
whose  (not who’s)
ours  (not our’s)