§605. Perfects and Perfect Participles

Perfects and Perfect Participles of two syllables have the first syllable long: as, iūvī, iūtum ( iŭvō), vīdī, vīsum ( vĭdeō); fūgī ( fŭgiō); vēnī ( vĕniō).

Exceptions.—bĭbī, dĕdī, fĭdī, scĭdī, stĕtī, stĭtī, tŭlī; cĭtum, dătum,ĭtum, lĭtum, quĭtum, rătum, rŭtum, sătum, sĭtum, stătum. In some compounds of stō, stātum is found (long), as praestātum.

a. In reduplicated perfects the vowel of the reduplication is short; the vowel of the following syllable is, also, usually short: as, cĕcĭdī ( cădō), dĭdĭcī ( discō), pŭpŭgī ( pungō), cŭcŭrrī ( currō), tĕtĕndī ( tendō), mŏmŏrdī ( mordeō). But cĕcīdī from caedō, pepēdī from pēdō.