-plēvistī, -plēstī; -plēvistis, -plēstis; -plēvērunt, -plērunt; plēverim, -plērim, &c.; -plēveram, -plēram, &c.; -plēvissem, -plēssem, &c.; -plēverō, -plērō, &c.; -plēvisse, -plēsse.

nōvistī, nōstī; nōvistis, nōstis; nōvērunt, nōrunt; nōverim, nōrim, &c.; nōveram, nōram, &c.; nōvissem, nōssem, &c.; nōverō always retains the v, but cōgnōrō, &c.; nōvisse, nōsse.

[891.] The verbs in which v belongs to the root ([864]), are not thus shortened, except moveō, mostly in compounds. From iuvō, iuerint (Catull.), adiuerō (Enn.), once each, and twice adiuerit (Plaut., Ter.) are unnecessary emendations.

[892.] Contractions in the perfect before -t and -mus are rare: as, inrītāt, disturbāt; suēmus or su͡emus (Lucr.), nōmus (Enn.), cōnsu͡emus (Prop.).

[893.] (b.) In tenses formed from perfect stems in -īv-, v is often dropped before -is-, -ēr-, or -er-; but contraction is common only in the forms which have -is-: as,

audīvistī, audīstī; audīvistis, audīstis; audīvērunt, audiērunt; audīverim, audierim, &c.; audīveram, audieram, &c.; audīvissem, audīssem, &c.; audīverō, audierō, &c.; audīvisse, audīsse. Sometimes audiī, audiit, audīt. Intermediate between the long and the short forms are audīerās and audīerit, once each (Ter.). In the perfect subjunctive, sinō has sīverīs (Plaut., Cato), sīrīs (Plaut., Cato, Liv.), sīreis (Pac.), or seirīs (Plaut.), sīrit (Plaut., Liv.), sīrītis (Plaut.), sīverint (Plaut., Curt.), sierint (Cic., Curt.), or sīrint (Plaut.). dēsinō is thought to have dēsīmus in the perfect indicative a couple of times (Sen., Plin. Ep.).

[NOUNS OF THE VERB.]

[INFINITIVE.]

[894.] The active infinitive has the ending -re in the present, and -isse in the perfect: as,

dare; regere, capere; laudāre, monēre, audīre. rēxisse; laudāvisse or laudāsse, monuisse, audīvisse or audīsse.