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An infinitive is the most basic form of a verb. It is “unmarked” (which means that it is not conjugated for tense or person), and it is preceded by the particle to.
Infinitives are known as non-finite verbs, meaning they do not express actions being performed by the subjects of clauses. Instead, infinitives function as nouns, adjectives, or adverbs to describe actions as ideas.
Infinitives are distinct from a similar construction known as bare infinitives or the base forms of verbs, which are simply infinitives without the particle to.
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see moodmood
or mode,
in verb inflection, the forms of a verb that indicate its manner of doing or being. In English the forms are called indicative (for direct statement or question or to express an uncertain condition, e.g.
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; tensetense
[O.Fr., from Lat.,=time], in the grammar of many languages, a category of time distinctions expressed by any conjugated form of a verb. In Latin inflection the tense of a verb is indicated by a suffix that also indicates the verb's voice, mood, person, and number.
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an indefinite form of the verb that can function syntactically as the substantive to provide the general name for an action or process, in many languages without reference to person, number, tense, or mood. It can have aspect, voice, and sometimes tense. A number of languages have various forms of the infinitive.

References in periodicals archive ?
Some verbs introduce the expectation of an infinitive verb form with the infinitival marker te, but they allow the marker to be absent in some configurations.
The example in (51b) deviates from the general scheme: the infinitive verb form verrassen is expected by the auxiliary zult, but it precedes the auxiliary.
Despite the evidence that these children were able to produce verb phrases with enclitics without problems, a significant number of examples where children omitted, not the enclitic but the tap in infinitive verb forms when preceded by an enclitic starting with a consonant sound were found; these are listed below:
A final possibility entertained was that such omissions were only used in rapid speech, but that the tap would surface if the children produced these infinitive verb + enclitic forms slowly and in a paused fashion.
The same is true for the deletion of taps in infinitive verb forms before nominal enclitics, as this pattern has been reported for Costa Rican Spanish Vasquez-Carranza (2006); yet, a different account which has been entertained here is that, these deletions result from something inherit in nominal enclitics, as taps in similar phonetic contexts do not get deleted consistently as do these taps (recall that although no previous studies have reported this tendency in child speech, some studies describe it in other adult Spanish dialects, namely Penny, 1969 [cited in Bradley, 2005] and Bradley, 1998).
However, postverbal subjects (considered to be in situ in Spec, VP as in Cornilescu 2000) and VP-adjoined adverbs may follow the infinitive verb, as in (18d).
In both cases an inflectional morpheme for mood, a `to', precedes the infinitive verb.
This condensed, stripped-down poetry, utilizing strings of nouns with only a few adjectives and infinitive verbs, eliminated narrative and description to get at the essence of feeling.