[986.] (d.) With the present stem in -io|e- ([836]).

gradior, stepgradīgressus
patior, sufferpatīpassus

Compounds of these two verbs have e for a: as, ad-gredior, per-petior, per-pessus; for forms of -gredior in -īrī, see [791].

[II. Denominative Verbs.]

[987.] Most verbs in -āre, -ēre, and -īre (or in -ārī, -ērī, and -īrī), are denominatives.

[988.] Some primitives from vowel roots have the form of denominatives in the present system, or throughout; and some verbs with a denominative present system have the perfect and perfect participle formed directly from a root.

[(1.) VERBS IN -āre.]

[(A.) PERFECT STEM WITHOUT A SUFFIX.]

[989.] (1.) The following verb in -āre has a reduplicated perfect stem ([859]):

stō, standstārestetī——