134 Accidence [§§ 283-4 series given in §§ 122-4. The reduplicated verbs, which form their preterite by ablaut and reduplication combined, belong to the seventh ablaut-series (§ 124). Both these, and those which form their preterite by reduplication simply, are here put together and called Class VII. § 283. Weak verbs form their preterite by the addition of a syllable containing a dental (Goth, -da, (-ta), OE. -de, •te; OHG. -ta), and their past participle by means of a dental suffix (Goth, -þ, (-t), OE. -d, (-t), OHG. -t), as sōkja, / seek, sōklđa, / sought, sðkiþs, sought; bugja, / buy, baúhta, / bought, baúhts, bought. The weak verbs, which for the most part are derivatives, are divided into four classes according as the infinitive ends in -jan (sōkjan, to seek, pret. sokida), -on (salbon, to anoint, pret. salboda), •an (haban, to have, pret. habáiđa), -nan (fullnan, to become full, pret. fullnōda). § 284. The Gothic verb has the following independent forms:— Two voices: active and passive. The passive (originally middle) only occurs in the indicative and subjunctive present; the other forms are supplied by the past participle used with waírþan or wisan. See § 435. Three numbers: singular, dual, and plural. In the passive there is no dual, and in the dual active the third person is wanting. Three persons: The third person of the dual is wanting. In the present passive there is only one form for all three persons of the plural. Two tenses : present and preterite. Two complete moods: indicative and subjunctive (originally optative), besides an imperative which is only used in the present tense of the active. A present infinitive which is an uninflected verbal substantive, a present participle with active meaning, and a past participle with passive meaning.