Originally Posted by
karenpatrick
Apostrophes (') in words that are just plurals. For example, craft's as opposed to crafts. The first is possessive (i.e. the craft's instructions were difficult to understand.) the second is plural (i.e. more than one craft.) The misplaced apostrophe is my biggest grammatical complaint.
An apostophy is also used to connect two words, a contraction, and I am frequently guilty of mis- using the wonderful "A".