Heavy Construction

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, go.[1][The root of is EI (weak form I). This ei becomes í except before a, o, and u, where it becomes e (cf. eó, eam, eunt). The strong form of the root, í, is shortened before a vowel or final -t; the weak form, i, appears in itum and itúrus.] PRINCIPAL PARTS: eó, íre, ií (íví), itum

PRESENT eó, ís, it eam, eás, eat
ímus, ítis, eunt eámus, eátis, eant
IMPERFECT íbam, íbás, íbat írem, írés, íret
íbámus, íbátis, íbant írémus, írétis, írent
FUTURE íbó, íbis, íbit
PERFECT ií (íví) ierim (íverim)
PLUPERFECT ieram (íveram) íssem (ívissem)
FUTURE PERFECT ieró (íveró)
íte ító, euntó
PARTICIPLES PRESENT iéns, gen. euntis

GERUND eundí, -dó, -dum, -dó SUPINE itum, itú

a. The compounds adeó, approach, ineó, enter, and some others, are transitive. They are inflected as follows in the passive: -

PRES. adeor IMPF. adíbar PRES. adear
adíris FUT. adíbor IMPF. adírer
adítur PERF. aditus sum PERF. aditus sim
adímur PLUP. aditus eram PLUP. aditus essem
adíminí F. P. aditus eró adeuntur

INFIN. adírí

aditus esse PART. aditus adeundus
Thus inflected, the forms of are used impersonally in the third person singular of the passive: as, itum est (§ 208. d). The infinitive írí is used with the supine in -um to make the future infinitive passive (§ 193. N.). The verb véneó, be sold (i.e. vénum eó, go to sale), has also several forms in the passive.

b. In the perfect system of the forms with v are very rare in the simple verb and unusual in the compounds.

c. ii before s is regularly contracted to í: as, ísse.

d. The compound ambió is inflected regularly like a verb of the fourth conjugation. But it has also ambíbat in the imperfect indicative.

e. Pró with retains its original d: as, pródeó, pródís, pródit.