The apostrophe (’, although often rendered as '), is a punctuation mark, and sometimes a mark, in languages that use the Latin alphabet or certain other alphabets. In English, it serves three purposes:Quirk, Geenbaum, Leech & Svartvik (1985) A Comprehensive Grammar of the English Language, p. 1636, Longman, London & New York, ISBN 0-582-51734-6.
