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The serial verb construction, also known as (verb) serialization or verb stacking, is a syntactic phenomenon in which two or more verbs or verb phrases are strung together in a single clause. It is a common feature of many African, Asian and New Guinean languages. Serial verb constructions are often described as coding a single event; they can also be used to indicate concurrent or causally-related events.
The terms "serial verbs", "serialization", etc. are used by different authors to denote somewhat different sets of constructions. There are also differences in how the constructions are analyzed, in terms of both syntax and semantics.
In general, a structure described as a serial verb construction will consist either of two (or possibly more) consecutive verbs or of two or more consecutive verb phrases in which each verb may have its own object and possibly other modifiers. There will usually be no marking, by means of affixes or subordinating conjunctions, that one verb is dependent on the other, and they will not be linked by coordinating conjunctions. Some linguists insist that serial verbs cannot be dependent on each other; however, if a language does not mark dependent verbs with affixation, it can be hard to determine whether any dependency relation exists when verbs appear in sequence.
Serial verbs normally denote actions that are closely connected and can be considered to be part of the same event. They may be actions taking place simultaneously, or one may represent the cause, purpose or result of the other. In most cases, the serial verbs in a sequence are understood to share the same subject.
Certain expressions resembling serial verb construction are found in English (surviving from Early Modern English), such as let's go eat and come live with me. In such constructions, the second verb would normally be regarded as a bare infinitive (and can generally be replaced by a "full" infinitive by the insertion of to before it).
Musa bé lá èbi.
Musa came took knife
"Musa came to take the knife."
The two verbs bé and lá appear consecutively, with no linking word (like "and") or anything else to indicate that one verb is subordinate to the other. The subject, "Musa", is understood to apply to both verbs. In this example, the second verb also has a direct object. Note that in the English version given, the second verb is translated by an infinitive, "to take", which is marked as subordinate to the first verb.
Depending on the language, the shared subject may be marked on both verbs or only one. In most of the examples, it is marked only once. However, in the following example from the Baré, in the Upper Amazon, the first person singular subject ("I") is marked twice:
"I pretended (that) I was asleep."
?urt jarrib a?ki ingl?zi
became(1SG) try(1SG) speak(1SG) English
"I started trying to speak English."
As a rule, serial verbs cannot be marked independently for categories such as tense, aspect and mood. Either all of the verbs are marked for the same features, or a sole marker is shared by all of them. In the Hindi ? - fon u?h?-kar kah? (literally, phone pick-up say (PAST)), "picked up the phone and said", only the second verb is marked as past tense, but both are understood to refer to the past. In the following example, from the West African Ewe, both verbs appear in their perfective form:
Kofí tr? dzo kpoo
Kofi turn(PFV) leave(PFV) quietly
"Kofi turned and left quietly."
In Japanese, two verbs may come together with the first verb in the continuative form (Japanese: , romanized: ren'y?kei), as in oshit?ru (?) ("push through"), in which oshi is the continuative form of osu ("push"), and t?ru ("get through") is a finite form whose present tense and indicative mood are understood to apply to oshi. Similarly, tobikomu (?) ("jump in") in which tobi is from tobu ("jump"), and komu means "go in"; dekiagaru () ("be completed"), where deki is from dekiru ("be able to be done") and agaru means "rise, be offered". No arguments can come between the two verbs in this construction (in contrast to those described in the following section).
hena nihiwawaka nu-t?ereka nu-yaka-u abi
NEG go(1SG) speak(1SG) mother(1SG) with
"I am not going to talk with my mother."
In Chinese, as in Southeast Asian languages, when a transitive verb is followed by an intransitive verb, the object of the combined verb may be understood as the object of the first verb and the subject of the second: ; ; 'tiger bite-die PERF Zhang' "the tiger bit Zhang to death", where Zhang is understood as the direct object of y?o ("bite") but as the subject of s? ("die"). In the equivalent construction in Hindi, the one who dies would be the tiger, not Zhang. (See Chinese grammar for more.)
In the following example from Maonan, a language spoken in the southeast of China, up to ten verbs co-occur in a sentence coding a single event without any linking words, coordinating conjunctions or any other markings:
?e2 s?:?3 l?t8 pa:i1 dzau4 van6 ma1 ?a5 v?4 kau5 fin1 kam5
1SG want walk go take return come try do look become PCL:Q
"Could I walk there to bring (it) back and try (it)?"
In some languages that have verb serialization, the verbs must appear consecutively with nothing intervening. In other languages, however, it is possible for arguments, normally the object of one of the verbs, to come in between the serialized verbs. The resulting construction is a sequence of verb phrases rather than of plain verbs. The following example is from the Nigerian Yoruba:
ó mú ìwé wá
he took book came
"He brought the book."
The object of the first verb intervenes between the verbs, resulting in two consecutive verb phrases, the first meaning "took the book", the second "came". As before, the subject ("he" in this case) is understood to apply to both verbs. The combined action of taking the book and coming can be translated as "bringing" the book.
Aémmaá de sikaá maá Kofä
Amma take money give Kofi
"Amma gives Kofi money."
In Japanese also, strings of verb phrases can be created, often denoting events that are related causally or in time. Such strings may be translated into English by using "and", "while", "(in order) to" or other connectives, but some may have a more compact translation, as in the following example (from Hayao Miyazaki's Mononoke Hime) in which the actions of "following" and "coming" are simultaneous:
The following sentence from Mandarin Chinese can be considered to contain four verb phrases in sequence:
? ? ? ? ?
w? zuò f?ij? cóng Shàngh?i dào B?ij?ng qù
I sit aircraft depart Shanghai arrive Beijing travel
"I travel from Shanghai to Beijing by aircraft."
In Chinese, however, there is often no clear distinction between serial verb phrases and prepositional phrases. The first three "verbs" in the above sentence may alternatively be regarded as prepositions (this applies particularly to words like cóng which do not normally appear as independent verbs). Words used in that way in Chinese and in some other languages are commonly referred to as coverbs.
A distinction is sometimes made between serial verbs and compound verbs (also known as complex predicates). In a compound verb, the first element (verb or noun) generally carries most of the semantic load, while the second element, often called a vector verb (light verb) or explicator verb, provides fine distinctions (such as speaker attitude or grammatical aspect) and carries the inflection (markers of tense, mood and agreement). The first element may be a verb in conjunctive participle form, or as in Hindi and Punjabi, a bare verbstem). For example, Hindi:
satt? kh? liy?
parched.grain eat take.PFV
"ate up the sattu"
In this example, ? liy? (from the verb ? len?, meaning "to take") is a vector verb that indicates a completed action, while kh? "eat" is the main or primary verb. Compare this to the following:
bacce ko kh? l?
child.OBL DAT eat throw.PFV
"devoured the child"
Again, kh? "eat" is the main verb. However, in this example ? l? (from the verb ln? "to put or throw") is the vector verb, indicating recklessness or an unwanted action. Both ? kh? liy? and ? kh? l? alternate with the corresponding perfective form of the main verb (in this case, ? kh?y? "ate") under partly specifiable semantic and pragmatic conditions. For instance, negation often suppresses compound verbs in favor of their non-compound counterparts:
satt? kh? liy?
parched.grain eat take.PFV
"ate up the sattu"
This sentence makes use of the vector verb ? len?, which may be dropped in the negative:
satt? nah kh?y?
parched.grain NEG eat.PFV.
"did not eat the sattu"
Here only the main verb is retained.