Grammatical case

A grammatical case is a category of nouns and noun modifiers (determiners, adjectives, participles, and numerals) that corresponds to one or more potential grammatical functions for a nominal group in a wording. In various languages, nominal groups consisting of a noun and its modifiers belong to one of a few such categories. For instance, in English, one says I see them and they see me: the nominative pronouns I / they represent the perceiver, and the accusative pronouns them/me represent the phenomenon perceived. Here, nominative and accusative are cases, that is, categories of pronouns corresponding to the functions they have in representation. English has largely lost its inflected case system but personal pronouns still have three cases, which are simplified forms of the nominative, accusative (including functions formerly handled by the dative), and genitive cases. They are used with personal pronouns: subjective case (I, you, he, she, it, we, they, who, whoever), objective case (me, you, him, her, it, us, them, whom, whomever), and possessive case (my, mine; your, yours; his; her, hers; its; our, ours; their, theirs; whose; whosever). Forms such as I, he, and we are used for the subject ("I kicked John"), and forms such as me, him, and us are used for the object ("John kicked me"). As a language evolves, cases can merge (for instance, in Ancient Greek, the locative case merged with the dative), a phenomenon known as syncretism. Languages such as Sanskrit, Latin, and Russian have extensive case systems, with nouns, pronouns, adjectives, and determiners all inflecting (usually by means of different suffixes) to indicate their case. The number of cases differs between languages: For example, modern Standard Arabic has three, so does modern English but only for pronouns; Hungarian is among those with the most, with potentially 18 cases. Commonly encountered cases include nominative, accusative, dative and genitive. A role that one of those languages marks by case is often marked in English with a preposition. For example, the English prepositional phrase with (his) foot (as in "John kicked the ball with his foot") might be rendered in Russian using a single noun in the instrumental case, or in Ancient Greek as τῷ ποδί (tôi podí, meaning "the foot") with both words – the definite article, and the noun πούς (poús) "foot" – changing to dative form. More formally, case has been defined as "a system of marking dependent nouns for the type of relationship they bear to their heads". Cases should be distinguished from thematic roles such as agent and patient. They are often closely related, and in languages such as Latin, several thematic roles are realised by a somewhat fixed case for deponent verbs, but cases are a syntagmatic / phrasal category, and thematic roles are the function of a syntagma / phrase in a larger structure. Languages having cases often exhibit free word order, as thematic roles are not required to be marked by position in the sentence.

History It is widely accepted that the Ancient Greeks had a certain idea of the forms of a name in their own language. A fragment of Anacreon seems to prove this. Grammatical cases were first recognized by the Stoics and from some philosophers of the Peripatetic school. The advancements of those philosophers were later employed by the philologists of the Library of Alexandria. Aristotle recognized the gender of nouns and their related endings, but it was with the Stoics and, subsequently, with the grammarians of the Hellenistic period that a systematic and complete grouping of the morphology of nouns and their declensions in Ancient Greek was achieved. Of particular importance is the work of Dionysius Thrax The Art of Grammar (2nd century BCE), which represents the first true grammar in the modern sense ever written about an Indo-European language and its structure. In addition to the definition of case and its structure, this work contains most of today's grammatical elements and structures.

Etymology The English word case used in this sense comes from the Latin casus, which is derived from the verb cadere, "to fall", from the Proto-Indo-European root *ḱh₂d-. The Latin word is a calque of the Greek   πτῶσις, ptôsis, lit. "falling, fall". The sense is that all other cases are considered to have "fallen" away from the nominative. This imagery is also reflected in the word declension, from Latin declinere, "to lean", from the PIE root *ḱley-. The equivalent to "case" in several other European languages also derives from casus, including cas in French, caso in Italian and Kasus in German. The Russian word паде́ж (padyézh) is a calque from Greek and similarly contains a root meaning "fall", and the German Fall and Czech pád simply mean "fall", and are used for both the concept of grammatical case and to refer to physical falls. The Dutch equivalent naamval translates as 'noun case', in which 'noun' has the older meaning of both 'adjective (noun)' and '(substantive) noun'. The Finnish equivalent is sija, whose main meaning is "position" or "place". Similar to Latin, Sanskrit uses the term विभक्ति (vibhakti) which may be interpreted as the specific or distinct "bendings" or "experiences" of a word, from the verb भुज् (bhuj) and the prefix वि (vi), and names the individual cases using ordinal numbers.

Indo-European languages

Although not very prominent in modern English, cases featured much more saliently in Old English and other ancient Indo-European languages, such as Latin, Old Persian, Ancient Greek, and Sanskrit. Historically, the Indo-European languages had eight morphological cases, although modern languages typically have fewer, using prepositions and word order to convey information that had previously been conveyed using distinct noun forms. Among modern languages, cases still feature prominently in most of the Balto-Slavic languages (except Bulgarian and Macedonian ), with most having six to eight cases, as well as Icelandic, German, Irish and Modern Greek, which have four. In German, cases are mostly marked on articles and adjectives, and less so on nouns. In Icelandic, articles, adjectives, personal names and nouns are all marked for case, making it the most conservative Germanic language. The eight historical Indo-European cases are as follows, with examples either of the English case or of the English syntactic alternative to case:

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