Apostrophe
left out letters
possession
An Apostrophe takes the place of letters left out.
Example
do n
o
t
don
'
t
can n
o
t
can
'
t
should n
o
t
shouldn
'
t
Links
http://www.grammarbook.com/punctuation/apostro.asp
http://owl.english.purdue.edu/owl/resource/621/1
http://grammar.about.com/od/punctuationandmechanics/tp/GuideApostrophe.htm
http://grammar.ccc.commnet.edu/grammar/marks/apostrophe.htm
An Apostrophe is used with nouns to show possession.
Example
Kristy
'
s house
Ethan
'
s car
possession