Preterite-present verb

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Following the convention in historical linguistics, this article marks unattested reconstructed words with an asterisk.

The preterite-present verbs are a small group of anomalous verbs in the Germanic languages which have acquired a present meaning from a perfect form. For example, Proto-Indo-European *woida, "I have seen", which is attested in Latin vīdī (same meaning) became Gothic wait meaning "I know". The present tense thus has the form of a vocalic (strong) preterite, with vowel-alternation between singular and plural. A new weak preterite is formed with a dental suffix.

Gothic Old English German Old Norse Icelandic Danish Swedish
infinitive witan witan wissen vita vita vide veta
present 1st & 3rd sg wait wāt weiß veit veit ved vet
present 3rd pl witun witon wissen vitu vita ved (veten)*
preterite 1st & 3rd sg wissa wisse wußte vissa/vissi vissi vidste visste
present participle witands witende wissend vitandi vitandi vidende vetande
past participle witans gewiten gewußt vitat vitað vidst vetat**
*(Considered extremely archaic, plural forms have generally been lost in modern Swedish.)

**(Actually, not the past participle but the supine.)

[edit] In Proto-Germanic

The known verbs in Proto-Germanic:

Infinitive Meaning Class Present Preterite
*witana "know" I wait wissa
*lisana "know" I lais lissa
*aigana "have", "own" I aig aihta
*dugana "be useful" II daug duhta
*unnana "grant" III ann unþa
*kunnana "know (how to)", later "can" III kann kunþa
*þurbana "need" III þarb þurfta
*dursana "dare" III dars dursta
*skulana "must", later "shall" IV skal skulda
*munana "think" IV man munda
*gamunana "remember" IV gaman gamunda
*binugana "behoove" V binag binuhta
*ganugana "be enough" V ganag ganuhta
*magana "can", later "may" VI mag mahta
*ōgana "fear" VI ōg ōhta
*mōtana "may", later "must" VI mōt mōsta
*gamōtana "have room" VI gamōt gamōsta

In modern English, preterite-present verbs are identifiable by the absence of an -s suffix on the 3rd person singular present tense form. Compare. for instance, he can with he sings (pret. he sang); the present paradigm of can is thus parallel with the past tense of a strong verb. In modern German there is also an ablaut shift between singular ich kann (I can) and plural wir können (we can). In the older stages of the Germanic languages (Old English, Middle High German) the past tense of strong verbs also showed different ablaut grades in singular and plural.

Many of the preterite-present verbs function as modal verbs (auxiliaries which are followed by a bare infinitive, without "to") and indeed most of the traditional modal verbs are preterite-presents. Examples are English must and shall/should, German dürfen (may), sollen (ought), mögen (like), and müssen (must). The early history of will (German wollen) is more complicated, as it goes back to an Indo-European optative, but the result in the modern languages is likewise a preterite-present paradigm.