Impersonal verb
Encyclopedia
In linguistics
Linguistics
Linguistics is the scientific study of human language. Linguistics can be broadly broken into three categories or subfields of study: language form, language meaning, and language in context....

, an impersonal verb is a verb
Verb
A verb, from the Latin verbum meaning word, is a word that in syntax conveys an action , or a state of being . In the usual description of English, the basic form, with or without the particle to, is the infinitive...

 that cannot take a true subject
Subject (grammar)
The subject is one of the two main constituents of a clause, according to a tradition that can be tracked back to Aristotle and that is associated with phrase structure grammars; the other constituent is the predicate. According to another tradition, i.e...

, because it does not represent an action, occurrence, or state-of-being of any specific person, place, or thing. The term weather verb is also sometimes used, since such weather-indicating verbs as to rain are usually impersonal.

In some language
Language
Language may refer either to the specifically human capacity for acquiring and using complex systems of communication, or to a specific instance of such a system of complex communication...

s, such as English
English language
English is a West Germanic language that arose in the Anglo-Saxon kingdoms of England and spread into what was to become south-east Scotland under the influence of the Anglian medieval kingdom of Northumbria...

, French
French language
French is a Romance language spoken as a first language in France, the Romandy region in Switzerland, Wallonia and Brussels in Belgium, Monaco, the regions of Quebec and Acadia in Canada, and by various communities elsewhere. Second-language speakers of French are distributed throughout many parts...

, German
German language
German is a West Germanic language, related to and classified alongside English and Dutch. With an estimated 90 – 98 million native speakers, German is one of the world's major languages and is the most widely-spoken first language in the European Union....

 and Dutch
Dutch language
Dutch is a West Germanic language and the native language of the majority of the population of the Netherlands, Belgium, and Suriname, the three member states of the Dutch Language Union. Most speakers live in the European Union, where it is a first language for about 23 million and a second...

, an impersonal verb always takes an impersonal pronoun (it in English, il in French, es in German, het in Dutch) as its syntactical subject:
It snowed yesterday. (English)
Il a neigé hier. (French)
Es schneite gestern. (German)
Het sneeuwde gisteren. (Dutch)


In some other languages (necessarily null subject language
Null subject language
In linguistic typology, a null-subject language is a language whose grammar permits an independent clause to lack an explicit subject. Such a clause is then said to have a null subject. Typically, null subject languages express person, number, and/or gender agreement with the referent on the verb,...

s and typically pro-drop language
Pro-drop language
A pro-drop language is a language in which certain classes of pronouns may be omitted when they are in some sense pragmatically inferable...

s), such as Portuguese
Portuguese language
Portuguese is a Romance language that arose in the medieval Kingdom of Galicia, nowadays Galicia and Northern Portugal. The southern part of the Kingdom of Galicia became independent as the County of Portugal in 1095...

, Spanish
Spanish language
Spanish , also known as Castilian , is a Romance language in the Ibero-Romance group that evolved from several languages and dialects in central-northern Iberia around the 9th century and gradually spread with the expansion of the Kingdom of Castile into central and southern Iberia during the...

, Occitan, Catalan
Catalan language
Catalan is a Romance language, the national and only official language of Andorra and a co-official language in the Spanish autonomous communities of Catalonia, the Balearic Islands and Valencian Community, where it is known as Valencian , as well as in the city of Alghero, on the Italian island...

, Italian
Italian language
Italian is a Romance language spoken mainly in Europe: Italy, Switzerland, San Marino, Vatican City, by minorities in Malta, Monaco, Croatia, Slovenia, France, Libya, Eritrea, and Somalia, and by immigrant communities in the Americas and Australia...

, Romanian
Romanian language
Romanian Romanian Romanian (or Daco-Romanian; obsolete spellings Rumanian, Roumanian; self-designation: română, limba română ("the Romanian language") or românește (lit. "in Romanian") is a Romance language spoken by around 24 to 28 million people, primarily in Romania and Moldova...

, in Hungarian
Hungarian language
Hungarian is a Uralic language, part of the Ugric group. With some 14 million speakers, it is one of the most widely spoken non-Indo-European languages in Europe....

 and all the Slavic languages
Slavic languages
The Slavic languages , a group of closely related languages of the Slavic peoples and a subgroup of Indo-European languages, have speakers in most of Eastern Europe, in much of the Balkans, in parts of Central Europe, and in the northern part of Asia.-Branches:Scholars traditionally divide Slavic...

, an impersonal verb takes no subject
Subject (grammar)
The subject is one of the two main constituents of a clause, according to a tradition that can be tracked back to Aristotle and that is associated with phrase structure grammars; the other constituent is the predicate. According to another tradition, i.e...

 at all, but it is conjugated
Grammatical conjugation
In linguistics, conjugation is the creation of derived forms of a verb from its principal parts by inflection . Conjugation may be affected by person, number, gender, tense, aspect, mood, voice, or other grammatical categories...

 in the third-person
Grammatical person
Grammatical person, in linguistics, is deictic reference to a participant in an event; such as the speaker, the addressee, or others. Grammatical person typically defines a language's set of personal pronouns...

 singular
Grammatical number
In linguistics, grammatical number is a grammatical category of nouns, pronouns, and adjective and verb agreement that expresses count distinctions ....

, which is much as though it had a third-person, singular subject.
Nevó ayer. (Spanish)
Nevou ontem. (Portuguese)
Sniježilo je jučer. (Croatian)
Havazott tegnap. (Hungarian)
Вчера вееше снег. / Včera veeše sneg. (Macedonian)


In the auxiliary
International auxiliary language
An international auxiliary language or interlanguage is a language meant for communication between people from different nations who do not share a common native language...

 language Interlingua
Interlingua
Interlingua is an international auxiliary language , developed between 1937 and 1951 by the International Auxiliary Language Association...

, verbs are not conjugated by person. Impersonal verbs take the pronoun il:
Il ha nivate heri. (Interlingua)


In the planned auxiliary language Esperanto
Esperanto
is the most widely spoken constructed international auxiliary language. Its name derives from Doktoro Esperanto , the pseudonym under which L. L. Zamenhof published the first book detailing Esperanto, the Unua Libro, in 1887...

, where verbs also are not conjugated for person, impersonal verbs are simply stated with no subject given or implied, even though Esperanto is otherwise not a null subject language:
Neĝis hieraŭ. (Esperanto)


The Celtic languages
Celtic languages
The Celtic languages are descended from Proto-Celtic, or "Common Celtic"; a branch of the greater Indo-European language family...

 also possess impersonal verbal forms, though their use is usually translated into English by forms such as 'one sees' (Welsh: gwelir), 'one did' (Welsh: gwnaethpwyd), 'one is' (Irish: táthar) etc., where the 'one' is taken to be an empty subject. For weather, personal verbs are used in Celtic languages, e.g. Welsh Mae hi'n bwrw eira 'it is snowing'.

Verbs meaning existence
Existential clause
Existential clauses are clauses that indicate only an existence. In English, they are formed with the dummy subject construction with "there", e.g. "There are boys in the yard". Many languages do not require a dummy subject, e.g. Finnish, where the sentence Pihalla on poikia is literally "On the...

 may also be impersonal.
"There are (some) books." / "There is a book."
Há livros. / Há um livro. (Portuguese)
Hay libros. / Hay un libro. (Spanish)


However, sometimes there are intransitive verb
Intransitive verb
In grammar, an intransitive verb is a verb that has no object. This differs from a transitive verb, which takes one or more objects. Both classes of verb are related to the concept of the transitivity of a verb....

s with more or less the same meaning:
"(Some) books exist." / "A book exists."
Existem livros. / Existe um livro. (Portuguese)
Existen libros. / Existe un libro. (Spanish)


An impersonal verb is different from a defective verb
Defective verb
In linguistics, a defective verb is a verb which is missing e.g. a past tense, or cannot be used in some other way that normal verbs come. Formally, it is a verb with an incomplete conjugation. Defective verbs cannot be conjugated in certain tenses, aspects, or moods.-Arabic:In Arabic, defective...

 in that with an impersonal verb, only one possible syntactical subject is meaningful (either expressed or not), whereas with a defective verb, certain choices of subject might not be grammatically possible, because the verb does not have a complete conjugation.

Some linguists consider the impersonal subject of a weather verb to be a "dummy pronoun
Dummy pronoun
A dummy pronoun is a type of pronoun used in non-pro-drop languages, such as English....

", while others interpret it differently.
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