Apostrophe
If the noun doesn’t end with an s, add ‘s to the end of the noun.
This is Mary and a dog. The dog is Mary’s; Mary is not the dog’s.
This thick blind is capable of shutting out the summer sun’s heat and light.
This is the way to the men’s room.
She got a job in the children’s section of the library.
If the noun ends with an s, add just the apostrophe to the end of the noun.
This is the boys’ bedroom.
My parents’ house is a lovely old one.
Where is Jess’ book bag?
The scissors’ handles just snapped off.
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I’m = I am
Where’s = where is
Who’s = who is
It’s = it is, or it has (N.B. This is the contraction, not the possessive.)
Isn’t = is not
Couldn’t = could not
Who’d = who would
Aren’t = are not
‘Cause = because
Ain’t = is not, are not
D’you = do you
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