Apostrophe
The apostrophe is used in many languages. Its chief purpose is to indicate a missing letter. So, for example, in French, lîle means the island, and is composed of île preceded by la which drops the ’ before another vowel: the apostrophe is there to acknowledge this.
Use in English=
In English it behaves not unlike a letter: it has three pronunciations (í, schwa, and a glottal stop); but it is most often silent. Because of this tendency to silence, and its punctuation-like appearance, it tends to be misused. On blogs, no matter what the general standard of literacy, one can see apostrophes wrongly inserted in plurals (plurals) and many examples of íts where there should be íts. Throughout the world there exist notices in which the writer shows off his or her supposed familiarity with English by inserting an apostrophe into an ordinary plural, as for example: LOT’S OF BARGAIN’S! which should read simply: LOTS OF BARGAINS! And that includes English-speaking countries: Lynne Truss calls them greengocers apostrophes. Conversely, apostrophes are often omitted, especially among capitals and in titles, presumably for aesthetic reasons: THE RAKES PROGRESS (The Râkes Prôgress), CHAMPIONS LEAGUE (Chámpions Lêague), BITCHES BREW (Bítches Breŵ: singular would be Bítch’s Breŵ – Miles Davis presumably did not intend a statement about the brewing habits of bitches). It is hard not to sympathise with the periodic calls for the apostrophes abolition.