Lesson 26 · Review

-iō Verbs and the Imperative Mood — vocabulary, rules, and a self-check

IVocabulary

Five new verbs that end in -iō — yet their short -ere infinitives put them in the third conjugation, not the fourth. Two familiar verbs return because their commands are irregular.

capiō, caperetake
faciō, faceremake, do
fugiō, fugereflee
iaciō, iacerehurl
rapiō, rapereseize
dīcō, dīceresay — review
dūcō, dūcerelead — review

II-iō Verbs of the Third Conjugation

The ending -iō looks fourth-conjugation, but the infinitive decides: a short -ĕre (capere) is third, a long -īre (audīre) is fourth. So capiō is third — it only borrows the fourth-conjugation -i- where two vowels fall together.

Rule 1 — The infinitive tells the conjugation

Never trust the -iō; read the infinitive. capiō, capere has the third conjugation's short -ĕre, so it is third — set beside audiō, audīre, whose long -īre marks the fourth.

capiō, capere → III · audiō, audīre → IV

PersonPresentImperfectFuture
1 sg.capiōcapiēbamcapiam
2 sg.capiscapiēbāscapiēs
3 sg.capitcapiēbatcapiet
1 pl.capimuscapiēbāmuscapiēmus
2 pl.capitiscapiēbātiscapiētis
3 pl.capiuntcapiēbantcapient
Rule 2 — The extra -i- appears only where two vowels meet

Compare capiō with audiō: the two run together wherever a vowel already follows — capiō / capiunt (like audiō / audiunt) and right through the imperfect and future (capiēbam, capiam). Everywhere else capiō is pure third conjugation: capis like regis, capit like regit.

has the -i-: capiō, capiunt, capiēbat, capiet · lacks it: capis, capit, capimus, capitis

IIIThe Imperative Mood

The imperative gives a command. It exists only in the second person: a singular for one hearer, a plural for many. The singular is the present stem; the plural adds -te.

ConjugationSingular — "…thou"Plural — "…ye"
I. amōamāamāte
II. moneōmonēmonēte
III. regōregeregite
III. (-iō) capiōcapecapite
IV. audiōaudīaudīte
sum (irreg.)eseste
Rule 3 — Third conjugation shifts -ĕ- to -ĭ- in the plural

Add -te to the singular, but in the third conjugation the stem's final -ĕ- weakens to -ĭ- before it: regeregite, and the same for the -iō verbs, capecapite. The other conjugations simply keep their stem vowel (amā → amāte, audī → audīte).

rege → regite · cape → capite · fuge → fugite · iace → iacite · rape → rapite

N.B. — dīc, dūc, fac drop the -e in the singular

Three common verbs have a clipped singular imperative: dīcōdīc, dūcōdūc, and faciōfac (not dīce, dūce, face). Their plurals are perfectly regular — dīcite, dūcite, facite — so only the one-person command is odd.

dīc / dīcite · dūc / dūcite · fac / facite

IVSelf-check

Six out of six before you start the exercises.

Question 1

capiō, capere ("take") ends in -iō. To which conjugation does it belong?

Right. The -iō is a decoy — the infinitive decides. capere has the third conjugation's short -ĕre, so capiō is third, unlike fourth-conjugation audiō, audīre with its long -īre.

Not quite — ignore the -iō and read the infinitive. A short -ĕre (capere) means third conjugation; only a long -īre (audīre) would make it fourth.

Question 2

Which form of capiō means "they take"?

Right. In the third person plural two vowels fall together, so the -iō verb borrows the fourth conjugation's -i-: capiunt, just like audiunt. capunt drops the needed -i-, and capent is not a present form at all.

Not quite — capiō keeps its -i- wherever a vowel follows, as in the third plural. Compare audiunt: the answer is capiunt.

Question 3

The singular command "take thou!" from capiō is —

Right. The singular imperative simply is the present stem: cape-cape. capite is the plural ("take ye!"), and capī is not a form of this verb.

Not quite — the singular imperative equals the present stem, cape. capite is the plural command, and capī is no real form here.

Question 4

fugiō, fugere ("flee") is a third-conjugation -iō verb. What is the plural command "flee ye!"?

Right. Add -te to the singular fuge, and the third conjugation's final -ĕ- weakens to -ĭ-: fugefugite, exactly as regeregite. So it is neither fugete nor the fourth-conjugation-looking fugīte.

Not quite — in the third conjugation the stem's -ĕ- becomes -ĭ- before -te: fugefugite, like regeregite.

Question 5

Which is the correct singular command "make!" from faciō?

Right. faciō is one of the three verbs — with dīcōdīc and dūcōdūc — whose singular imperative drops the -e: fac, not face. The plural facite stays regular.

Not quite — faciō has an irregular clipped singular imperative fac (like dīc, dūc). face is wrong, and facite is the plural.

Question 6

Translate the command Rapite praedam! (rapiō = seize; praeda = booty).

Right. The -te ending marks the plural imperative, a command to more than one person: Rapite! A command to a single person would be Rape!, and "they seize" is the indicative rapiunt.

Not quite — -te is the plural command ending, so Rapite! addresses more than one person. The singular would be Rape!, and rapiunt would be "they seize."

Answered correctly: 0 / 6