Genitive facts for kids
The Genitive case is a form of a noun that indicates the possessive case of a noun, ie: the object that the noun is referencing is owning or possessing some other object.
Several languages have genitive cases, including Latin, Greek, Russian, Finnish and Sanskrit. Compare nominative case, accusative case, dative case, ablative case, vocative case, ergative case.
It is a common misconception that English nouns have a genitive case, marked by the possessive " 's " ending. Linguists however have shown that the English possessive is not a case at all, but rather a clitic, an independent word which however is always written and pronounced as part of the preceding word. This can be shown by the following example: "The King of Sparta's wife was called Helen". Now if the English " 's " were a genitive, then the wife would belong to Sparta; but the " 's " attaches not to the word "Sparta" but to the entire phrase "King of Sparta".
That is not to say that the English possessive did not have its origins as a genitive case; but it has developed into being a clitic instead. In Old English, the possessive form of ban (bone) is banes. This developed, later, into the modern English possessive mark of " 's " as in "bone's." The 18th century explanation that the apostrophe might replace a genetive pronoun, as in "the king's horse" being a shortened form of "the king, his horse," is erroneous. Rather, the apostrophe is replacing the "e" from the Old English morphology.
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See also
In Spanish: Caso genitivo para niños