or sent-tus).
caed-ere, " cae-sus (for caed-tus).

a. Note that g, before t, becomes c (see Sec. 8, 5); b becomes p; while dt
or tt becomes ss, which is then often simplified to s (Sec. 8, 2).

2. After the analogy of Participles like sensus and caesus, where -sus
arises by phonetic change, -sus for -tus is added to other Verb Stems;
as,--

lab-i, Participle lap-sus.
fig-ere, " fi-xus.

a. The same consonant changes occur in appending this ending -sus to the
stem as in the case of the Perfect ending -si (see Sec. 118, 3, a).

3. A few Verbs form the Participle in -itus; as,--

doma-re, dom-itus.
mone-re, mon-itus.

4. The Future Active Participle is usually identical in its stem with the
Perfect Passive Participle; as, ama-tus, amaturus; moni-tus, moniturus.
But--

juva-re, Perf. Partic. jutus, has Fut. Act. Partic. juvaturus.[40]
lava-re, " " lautus, " " " lavaturus.
par-ere, " " partus, " " " pariturus.
ru-ere, " " rutus, " " " ruiturus.
seca-re, " " sectus, " " " secaturus.
fru-i, " " fructus, " " " fruiturus.
mor-i, " " mortuus, " " " moriturus.
ori-ri, " " ortus, " " " oriturus.

* * * * *

LIST OF THE MOST IMPORTANT VERBS, WITH PRINCIPAL PARTS.

First (_A_-) Conjugation.

120. I. PERFECT IN -VI.

amo amare amavi amatus _love_

All regular verbs of the First Conjugation follow this model.

poto potare potavi potus (Sec. 114, _drink_
2)

II. PERFECT IN -UI.

crepo crepare crepui crepiturus _rattle_
cubo cubare cubui cubiturus _lie down_
domo domare domui domitus _tame_
frico fricare fricui frictus _and_ _rub_
fricatus
mico micare micui ---- _glitter_
dimico dimicare dimicavi dimicatum _fight_
(est)[41]
ex-plico explicare explicavi explicatus _unfold_
(-ui) (-itus)
im-plico implicare