Intransitive verb

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In grammar, an intransitive verb does not allow an object.[1] This is distinct from a transitive verb, which takes one or more objects. The verb property is called transitivity.


In the following sentences, verbs are used without direct object:

  • "I sneezed."
  • "My dog ran."
  • "When he finished the race, he barfed."
  • "Water evaporates when it's hot."
  • "You've grown since I last saw you!"

The following sentences contain transitive verbs (they take one or more objects):

  • "We watched a movie last night."
  • "She's eating popcorn."
  • "When I said that, my sister smacked me."
  • "Santa gave me a present."

Some verbs allow for objects but do not always require one. In other words, a verb may be used as intransitive in one sentence, and as transitive in another:

Intransitive Transitive
"It's raining." "It's raining cats and dogs."
"When he finished the race, he barfed." "When he finished the race, he barfed up his lunch."
"Water evaporates when it's hot." "Heat evaporates water."
"He's been singing all day." "He's been singing barbershop all day."
"You've grown since I last saw you." "You've grown a beard since I last saw you!"

In general, intransitive verbs often involve weather terms, involuntary processes, states, bodily functions, motion, action processes, cognition, sensation, and emotion.[2]:54–61

Valency-changing operations

The valency of a verb is related to transitivity. Where the transitivity of a verb only considers the objects, the valency of a verb considers all the arguments the verb takes, including both the subject of the verb and all of the objects (of which there are none for an intransitive verb).

It is possible to change the transitivity of a verb, and in so doing to change the valency.

In languages that have a passive voice, a transitive verb in the active voice becomes intransitive in the passive voice. For example, consider the following sentence:

David hugged Mary.

In this sentence, "hugged" is a transitive verb taking "Mary" as its object. The sentence can be made passive with the direct object "Mary" as the grammatical subject as follows:

Mary was hugged.

This shift is called promotion of the object.

The passive-voice construction cannot take an object. The passivized sentence could be continued with the agent:

Mary was hugged by David.

It cannot be continued with a direct object to be taken by "was hugged." For example, it would be ungrammatical to write "Mary was hugged her daughter" in order to show that Mary and her daughter shared a hug.

Intransitive verbs can be made passive in some languages. In English, intransitive verbs can be used in the passive voice when a prepositional phrase is included, as in, "The houses were lived in by millions of people."

Some languages, such as Dutch, have an impersonal passive voice that allows an intransitive verb which does not have a prepositional phrase to be made passive. In German, a sentence such as "The children sleep" can be made passive to remove the subject and will become "It is slept". However, no addition like " the children" is possible in such cases.

In languages with ergative–absolutive alignment, the passive voice (where the object of a transitive verb becomes the subject of an intransitive verb) does not make sense, because the noun associated with the intransitive verb is marked as the object, not as the subject. Instead, these often have an antipassive voice. In this context, the subject of a transitive verb is promoted to the "object" of the corresponding intransitive verb. In the context of a nominative–accusative language like English, this promotion is nonsensical because intransitive verbs don't take objects, they take subjects, and so the subject of a transitive verb ("I" in I hug him) is also the subject of the intransitive passive construction (I was hugged by him). But in an ergative–absolutive language like Dyirbal, "I" in the transitive I hug him would take the ergative case, but the "I" in I was hugged would take the absolutive, and so by analogy the antipassive construction more closely resembles *was hugged me. Thus in this example, the ergative is promoted to the absolutive, and the agent (i.e. him), which was formerly marked by the absolutive, is deleted to form the antipassive voice (or is marked in a different way, in the same way that in the English passive voice can still be specified as the agent of the action using by him in I was hugged by him—for example, Dyirbal puts the agent in the dative case, and Basque retains the agent in the absolutive).


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In many languages, there are "ambitransitive" verbs, which can be either transitive or intransitive. For example, English play is ambitransitive (both intransitive and transitive), since it is grammatical to say His son plays, and it is also grammatical to say His son plays guitar. English is rather flexible with regards to verb valency, and so it has a high number of ambitransitive verbs; other languages are more rigid and require explicit valency changing operations (voice, causative morphology, etc.) to transform a verb from intransitive to transitive or vice versa.

In some ambitransitive verbs, called ergative verbs, the alignment of the syntactic arguments to the semantic roles is exchanged. An example of this is the verb break in English.

(1) He broke the cup.
(2) The cup broke.

In (1), the verb is transitive, and the subject is the agent of the action, i.e. the performer of the action of breaking the cup. In (2), the verb is intransitive and the subject is the patient of the action, i.e. it is the thing affected by the action, not the one that performs it. In fact, the patient is the same in both sentences, and sentence (2) is an example of implicit middle voice. This has also been termed an anticausative.

Other alternating intransitive verbs in English are change and sink.

In the Romance languages, these verbs are often called pseudo-reflexive, because they are signaled in the same way as reflexive verbs, using the clitic particle se. Compare the following (in Spanish):

(3a) La taza se rompió. ("The cup broke.")
(3b) El barco se hundió. ("The boat sank.")
(4a) Ella se miró en el espejo. ("She looked at herself in the mirror.")
(4b) El gato se lava. ("The cat washes itself.")

Sentences (3a) and (3b) show Romance pseudo-reflexive phrases, corresponding to English alternating intransitives. As in The cup broke, they are inherently without an agent; their deep structure does not and can not contain one. The action is not reflexive (as in (4a) and (4b)) because it is not performed by the subject; it just happens to it. Therefore, this is not the same as passive voice, where an intransitive verb phrase appears, but there is an implicit agent (which can be made explicit using a complement phrase):

(5) The cup was broken (by the child).
(6) El barco fue hundido (por piratas). ("The boat was sunk (by pirates).")

Other ambitransitive verbs (like eat) are not of the alternating type; the subject is always the agent of the action, and the object is simply optional. A few verbs are of both types at once, like read: compare I read, I read a magazine, and this magazine reads easily.

Some languages like Japanese have different forms of certain verbs to show transitivity. For example, there are two forms of the verb "to start":

(7) 会議が始まる。 (Kaigi ga hajimaru. "The meeting starts.")
(8) 会長が会議を始める。 (Kaichō ga kaigi o hajimeru. "The president starts the meeting.")

In Japanese, the form of the verb indicates the number of arguments the sentence needs to have.[3]

Unaccusative and unergative verbs

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Especially in some languages, it makes sense to classify intransitive verbs as:

  • unaccusative when the subject is not an agent; that is, it does not actively initiate the action of the verb (e.g. "die", "fall").
  • unergative when they have an agent subject (e.g. "run", "talk", "resign").

This distinction may in some cases be reflected in the grammar, where for instance different auxiliary verbs may be used for the two categories.

Cognate objects

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In many languages, including English, some or all intransitive verbs can take cognate objects—objects formed from the same roots as the verbs themselves; for example, the verb sleep is ordinarily intransitive, but one can say, "He slept a troubled sleep", meaning roughly "He slept, and his sleep was troubled."

See also


  1. 2008,
  2. Payne, Thomas E. (1997). Describing morphosyntax: A guide for field linguists. Cambridge: Cambridge University Press.
  3. Tsujimura, N., ed. by Natalia Gagarina and I. Gülzow (2007). The acquisition of verbs and their grammar : the effect of particular languages. Dordrecht [u.a.]: Springer. p. 106. ISBN 978-1-4020-4336-9.