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Adposition

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Adpositions are a vital class of words in linguistics. They function as connectors within a sentence. These words express spatial or temporal relations between different elements. For example, they can show location using words like "in" or "under." They can also indicate time using words like "ago" or "during." Beyond space and time, they mark various semantic roles. This means they help define the relationship of a noun to other parts of a sentence. They act as the glue that makes complex descriptions possible.

An adposition typically works with a specific partner called a complement. This complement is most often a noun phrase. A noun phrase includes a noun and its modifiers, such as articles or adjectives. In some analyses, the complement is described as a determiner phrase. The complement is also sometimes referred to as the object of the adposition. When an adposition and its complement join together, they form an adpositional phrase. This phrase can function as a grammatical modifier or a complement in many different types of phrases.

Linguists classify adpositions based on where they sit relative to their complement. The most common type is the preposition. The name comes from the Latin prefix "pre-", meaning "before." In English, prepositions precede their complement, such as in "in England." Another type is the postposition. This comes from the Latin prefix "post-", meaning "behind" or "after." In languages like Turkish or Japanese, these words follow the complement. Some languages, such as Finnish, can use both prepositions and postpositions. A rarer type is the circumposition. This consists of two parts that appear on both sides of the complement. These are common in languages like Pashto and Kurdish.

History and etymology provide insight into these terms. The term "preposition" specifically describes the word order found in Latin, Greek, and English. In these languages, the word is "pre-positioned" before its object. Conversely, postpositions are used in languages like Sindhi, Hungarian, and Korean. There are also terms for words that can switch roles. An ambiposition can function as both a preposition and a postposition. In German, you can say "along the road" or "the road along." Some linguists use the term "preposition" for all adpositions, regardless of their actual position.

Adpositions possess several unique grammatical properties. Most adpositions are "invariant," meaning they do not change form. They do not have tense, case, or gender like verbs or nouns do. However, some can fuse with a pronominal object to become inflected. Adpositions can also determine the grammatical case of their complement. In English, complements usually take the objective case, such as "from him." In Koine Greek, certain prepositions always require the dative case. Some languages even use a special "prepositional case" used exclusively after these words.

In terms of usage, adpositions are incredibly frequent. In English, they appear very early in frequency rankings. The most common English adpositions include "of," "to," "in," "for," and "on." Most of these are single, monomorphemic words. This means they are single-syllable words that cannot be broken into smaller units of meaning. Adpositions also form a "closed class" of lexical items. This means languages do not regularly create new adpositions from other word categories.

Adpositions also relate to the broader structure of a language's typology. The position of an adposition often correlates with other word order patterns. Languages that use postpositions tend to be "head-final." This means they often have verbs that follow their objects. Languages that use prepositions are often "head-initial." This means they tend to have verbs that precede their objects. While this is a strong tendency, there are exceptions. For instance, Latin uses mostly prepositions but often places verbs after their objects.

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