Stuart's Daily Word Spot: Apostrophe

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Apostrophe: noun - punctuation, an inverted comma that designates either possession or a contraction of a word or phrase; an address to a person, place or thing not currently present; exclamatory address or  passage to a particular person or thing.
'In "Eats Shoots and Leaves", Lynne Truss has provided a humorous, entertaining but scholarly treatise on the misuse and proper usage of, amongst others, the much abused apostrophe, as a punctuation mark.'
'The simple way to remember whether you should use "it's" or "its" is to decide whether or not you could substitute "it is", in which case, the contracted form, "it's" is appropriate.'