Latin 2 Quiz: 3rd Io And 4th Conjugation Verbs
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3rd Io And 4th Conjugation VerbsQuestion 1 of 13

Which form of capiō is built on the present stem?

cēperat
capiēbat
captus est
cēpisset
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Latin 2 Quiz

Latin 2 Quiz: 3rd Io And 4th Conjugation Verbs

Practice 3rd Io And 4th Conjugation Verbs in Latin 2 with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on 3rd Io And 4th Conjugation Verbs, giving you a quick way to practice the rules, question types, and explanations that matter most for Latin 2.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

All questions

Question 1

Which form of capiō is built on the present stem?

  1. cēperat
  2. capiēbat (correct answer)
  3. captus est
  4. cēpisset
Explanation: The present stem of capiō is capi-, so capiēbat (capi- + -ēba- + -t) is built directly on it. The other forms are not: cēperat and cēpisset use the perfect stem cēp-, and captus est uses the supine stem capt-. The tempting trap is captus est, because it is passive, but its stem is not the present stem.

Question 2

Which pair contains present active 3rd-person plurals, one 3rd-io and one 4th?

  1. capiunt / audient
  2. capient / audient
  3. capiunt / audiunt (correct answer)
  4. capient / audiunt
Explanation: Third-io capio and fourth audio both form present active 3rd plurals with -iunt: capiunt and audiunt. The forms capient and audient are future tense, not present. The tempting trap is capiunt / audient: capiunt is right, but audient means 'they will hear,' so it fails the present-tense requirement.

Question 3

In 'Nōs sapientiam cupimus,' cupimus means...

  1. we were desiring
  2. we are desired
  3. we will desire
  4. we are desiring (correct answer)
Explanation: Cupimus comes from cupio, with the active present ending -mus: first-person plural, so you're looking at 'we desire / we are desiring.' The tempting trap is 'we are desired,' which would be cupimur (passive ending -mur). Cupimus is active, so 'desiring' is right, not 'desired.'

Question 4

Audītis is 2nd plural present. Which 3rd-io verb is also 2nd plural present?

  1. capitis (correct answer)
  2. capit
  3. capiunt
  4. capimus
Explanation: Capio is a 3rd-io verb, so its present endings follow capio, capis, capit, capimus, capitis, capiunt. The 2nd plural form is capitis, matching the pattern of auditis. Capiunt is 3rd plural, capimus is 1st plural, and capit is 3rd singular, so none of those fit.

Question 5

In 'Mārcus verba audit,' audit means...

  1. he is hearing (correct answer)
  2. he is heard
  3. he will hear
  4. he has heard
Explanation: Audit is the present active form of audire, so Marcus is performing the action of hearing now. It means 'he is hearing' or 'he hears.' The tempting 'he has heard' would need the perfect audivit, and 'he is heard' would need the passive auditur.

Question 6

Which of the following correctly identifies the person, number, and conjugation of the verb form audimus?

  1. 1st person plural present active of a 4th conjugation verb, meaning 'we hear,' with the thematic vowel -i- marking 4th conjugation throughout the present system. (correct answer)
  2. 1st person plural present active of a 3rd-io conjugation verb, meaning 'we hear,' since the -imus ending with a short stem vowel is characteristic of 3rd-io verbs.
  3. 2nd person singular present active of a 4th conjugation verb, meaning 'you hear,' because -imus can signal a singular form when the stem ends in a long vowel.
  4. 1st person plural imperfect active of a 4th conjugation verb, meaning 'we were hearing,' since the -imus ending attached to an -i- stem regularly signals the imperfect in Latin.
Explanation: When analyzing a Latin verb form, your first move should be to isolate the ending and identify the stem vowel — these two clues together reveal person, number, tense, and conjugation. Take audimus: break it into audi- (stem) + -mus (ending). The ending -mus consistently marks 1st person plural in Latin across all conjugations and tenses — no exceptions. The stem audi- comes from audīre, and that long -ī- stem vowel is the signature of 4th conjugation verbs. Combined, audimus is 1st person plural present active, meaning "we hear." That makes A correct. B is tempting because 3rd-io verbs (like capiō) also show -i- in their stems, but their present 1st plural is formed differently — capimus has a short -i-, while audimus retains the long -ī- of a true 4th conjugation stem. The meaning "we hear" also points away from any 3rd-io verb. C invents a rule that doesn't exist. The ending -imus never signals 2nd person singular — that role belongs to -s or -ris endings. There is no scenario where -imus becomes singular. D confuses the imperfect with the present. The imperfect of 4th conjugation verbs uses -iēbā- as its tense marker (audiēbāmus = "we were hearing"). The -imus ending with no tense marker signals the present, not the imperfect. Your study tip: memorize the personal endings (-ō/-m, -s, -t, -mus, -tis, -nt) cold — they're your anchor for every verb question on this exam.

Question 7

Consider the following set of verb forms: facis, dormis, capis, audis.

A student argues that all four forms are morphologically identical in structure and therefore all belong to the same conjugation. Which response most accurately addresses this argument?

  1. The student is correct: all four forms end in -is and are therefore 4th conjugation 2nd person singular present active forms with identical morphological structure and conjugation class.
  2. The student is correct about both structure and conjugation: all four belong to 3rd-io, since the -is ending preceded by -i- is the exclusive marker of 3rd-io verbs in the 2nd person singular present active.
  3. The student is correct that all four are morphologically identical, but wrong about conjugation: they all belong to 4th conjugation, since only 4th conjugation verbs insert -i- before personal endings in the present tense.
  4. The student is partially correct about surface structure but wrong about conjugation: facis and capis are 3rd-io verbs while dormis and audis are 4th conjugation; the -is ending looks identical across forms but derives from different underlying stem vowels in each conjugation class. (correct answer)
Explanation: When you see verb forms that look identical on the surface, your job is to look beneath the ending and ask: where does that vowel actually come from? This question tests whether you understand that Latin's conjugation classes produce identical surface forms through different underlying mechanisms. Take the four forms: facis (facere, 3rd-io), capis (capere, 3rd-io), dormis (dormire, 4th), and audis (audire, 4th). All four end in -is, the standard 2nd person singular present active ending. But the -i- before that ending has two different origins. In 4th conjugation verbs like dormis and audis, the -i- belongs to the stem itself — the infinitive dormire/audire already contains that long -ī-. In 3rd-io verbs like facis and capis, the -i- is inserted in certain present tense forms, even though the infinitive (facere/capere) shows a short -e-. Same surface output, different grammatical history. Answer D captures this precisely — the student is right that the forms look alike, but wrong to assume identical appearance means identical conjugation. Answer A fails because assigning all four to 4th conjugation ignores that facere and capere are 3rd-io verbs. Answer B makes the opposite error — claiming all four are 3rd-io — and also invents a rule that -i- before personal endings is an exclusive marker of 3rd-io, which is false since 4th conjugation shares this feature. Answer C repeats the same conjugation error as A while adding a false grammatical claim. Your study tip: always check the infinitive to identify conjugation class. -ere (short e) = 3rd conjugation; -īre = 4th. The present tense alone can deceive you.

Question 8

A student must produce the 2nd person singular present active imperative of sentire. The student writes senti. Which of the following evaluations of the student's answer is most accurate?

  1. The answer is incorrect: sentire is a 3rd-io conjugation verb (not 4th), so the imperative is formed differently, yielding sente by analogy with regular 3rd conjugation imperatives rather than the student's senti.
  2. The answer is incorrect: sentire is a 4th conjugation verb, so the correct imperative form requires the full infinitive stem plus the imperative marker -e, giving sentie rather than senti.
  3. The answer is correct: sentire is a 4th conjugation verb, and the 2nd person singular present active imperative of 4th conjugation verbs is formed by dropping the -re from the infinitive, yielding senti, which also happens to be identical to the present stem. (correct answer)
  4. The answer is correct: sentire is a 3rd-io conjugation verb, and 3rd-io imperatives are formed by dropping -ere from the infinitive and retaining the -i-, which produces senti just as capere produces cape for regular 3rd conjugation.
Explanation: When forming the 2nd person singular present active imperative in Latin, your go-to rule is simple: drop -re from the present active infinitive. The tricky part is knowing which conjugation you're dealing with, since the result looks different across conjugations. Sentire belongs to the 4th conjugation, identifiable by its infinitive ending in -īre (like audire, venire, dormire). Drop -re, and you get senti — which is both the correct imperative and, conveniently, identical to the present stem. This makes C the correct evaluation. The student's answer is right, and the reasoning behind it is sound: 4th conjugation imperative = infinitive minus -re. A is wrong on two counts. First, sentire is not a 3rd-io verb — 3rd-io verbs have infinitives ending in -ere (like capere, facere). Second, the claim that the imperative would be sente misapplies the 3rd conjugation rule to a verb that doesn't belong there. B is wrong because it invents a nonexistent rule. There is no "-e imperative marker" added to the stem in 4th conjugation. Sentie is not a Latin form; you simply drop -re, nothing more. D is wrong because it misclassifies sentire as 3rd-io, and its internal logic is also confused — 3rd conjugation capere drops -ere to yield cape, not capi, so the analogy it constructs doesn't even hold together. Study tip: Memorize infinitive endings by conjugation (1st -āre, 2nd -ēre, 3rd -ere, 4th -īre). The imperative rule — drop -re — is universal; the conjugation tells you what's left over.

Question 9

A student must produce the present active infinitive of the verb whose 1st person singular present active indicative is cupio. The student proposes two candidates: cupire (4th conjugation) or cupere (3rd-io conjugation). Which choice is correct, and what is the most reliable basis for making that determination?

  1. Cupire is correct; any verb whose 1st person singular ends in -io belongs to the 4th conjugation, and 4th conjugation verbs always form their infinitive with the long -ire ending rather than the short -ere ending.
  2. Cupire is correct; although both 3rd-io and 4th conjugation verbs end in -io in the 1st person singular, the stem vowel of cupio is long, which aligns it with 4th conjugation verbs and their -ire infinitive.
  3. Cupere is correct; the 1st person singular ending -io always marks a verb as 3rd-io conjugation, and 3rd-io verbs invariably form their infinitive with the short -ere ending, so cupere follows automatically.
  4. Cupere is correct; the -io ending in the 1st person singular is shared by both 3rd-io and 4th conjugation verbs and cannot alone determine the infinitive. The student must consult the principal parts — cupio, cupere — which confirm 3rd-io conjugation with a short -e- infinitive. (correct answer)
Explanation: When you see a verb ending in -io in the first person singular present, your instinct might be to assign it immediately to either the 3rd-io or 4th conjugation — but that's exactly the trap this question is testing. Both conjugations share the -io ending in that form, which means the first person singular alone tells you nothing definitive about which conjugation the verb belongs to. The only reliable method is to consult the principal parts. For cupio, the dictionary entry reads cupio, cupere, cupivi, cupitum — and that second entry, the present active infinitive cupere, is your proof. The short -e- in cupere is the hallmark of the 3rd-io conjugation, distinguishing it from 4th conjugation verbs like audio, whose infinitive is audire (long -i-). So D is correct: the -io ending is ambiguous, and the principal parts resolve that ambiguity decisively. Choice A is wrong because it claims -io always signals 4th conjugation — it doesn't; 3rd-io verbs share that ending. Choice B invents a rule about stem vowel length that does not exist as a reliable classifier for Latin conjugations. Choice C makes the opposite error from A, claiming -io always signals 3rd-io — again false, since genuine 4th conjugation verbs like audio also end in -io. Study tip: Never determine a verb's conjugation — or its infinitive — from the first person singular alone. Always memorize the full principal parts; the infinitive is the second entry and directly reveals which conjugation you're dealing with.

Question 10

A student encounters the present active indicative form capit and must determine whether it belongs to a 3rd-io or 4th conjugation verb. The student reasons: 'Since the form ends in -it, not -iet, it must be present tense, and since -i- appears before the ending, this is 4th conjugation.' Which flaw, if any, is present in this reasoning?

  1. The reasoning is flawed: capit is actually a future tense form, not present, because 3rd-io conjugation verbs form the future with a vowel change rather than -iet, and -it can signal future tense in that conjugation under certain phonological conditions.
  2. The reasoning is flawed: while correctly identifying capit as present tense, the student wrongly concludes that the -i- before -t proves 4th conjugation. Both 3rd-io and 4th conjugation verbs produce a 3rd person singular present in -it (e.g., capit from 3rd-io capio; audit from 4th audio), so the -i- in this slot is not exclusive to 4th conjugation. (correct answer)
  3. The reasoning is correct: the -i- appearing before -t in capit is the diagnostic marker of 4th conjugation in the 3rd person singular present, since regular 3rd conjugation verbs produce -it without a preceding -i- (e.g., ducit), confirming that any -i- before -t signals 4th conjugation.
  4. The reasoning is flawed: the student correctly identifies the -i- before -t as meaningful, but draws the wrong conclusion — the -i- in capit actually proves 3rd-io conjugation specifically, since 4th conjugation verbs drop the stem -i- before the -t ending in the 3rd person singular present.
Explanation: When distinguishing 3rd-io from 4th conjugation verbs, students often search for a single "diagnostic" marker — but the trap is assuming that one feature belongs exclusively to one conjugation. This question tests exactly that misconception. The core issue is that both 3rd-io and 4th conjugation verbs produce identical 3rd person singular present active forms ending in -it with a preceding -i-. Consider: capit comes from capio (3rd-io), and audit comes from audio (4th conjugation). Both end in -it; both show an -i- in that position. The student in the question correctly identifies the tense as present — that part is fine — but then commits a logical error by treating the -i- as proof of 4th conjugation. Since the same form appears in both conjugations, it cannot distinguish between them. The correct answer is B. A is wrong because capit is genuinely present tense, not future. The future of 3rd-io verbs uses -iet (e.g., capiet), so capit with a short -i- is unmistakably present. There's no phonological condition that makes -it signal future tense here. C is wrong because it validates the student's flawed conclusion. The claim that -i- before -t is "exclusive to 4th conjugation" is simply false — capit (3rd-io) disproves it directly. D is wrong in the opposite direction: 4th conjugation verbs do not drop the stem -i- in the 3rd person singular present. Audio → audit retains the -i- just as 3rd-io does. Study tip: To tell 3rd-io from 4th conjugation, always check the infinitive (capere vs. audire) or the 1st person singular (capio vs. audio) — never rely on the 3rd person singular present alone.

Question 11

Read the following Latin sentence: Pueri in horto dormiunt dum mater cibum facit.

Which of the following analyses of the verbs in this sentence is entirely correct regarding conjugation and translation?

  1. Dormiunt is 4th conjugation, 3rd person plural present active ('they are sleeping'); facit is 3rd conjugation (not 3rd-io), 3rd person singular present active ('she/he makes'). Both translations are accurate.
  2. Dormiunt is 3rd-io conjugation, 3rd person plural present active ('they are sleeping'); facit is 3rd conjugation (not 3rd-io), 3rd person singular present active ('she/he makes'). Both translations are accurate.
  3. Dormiunt is 4th conjugation, 3rd person plural present active ('they are sleeping'); facit is 3rd-io conjugation, 3rd person singular present active ('she/he makes'). Both translations are accurate. (correct answer)
  4. Dormiunt is 3rd-io conjugation, 3rd person plural present active ('they are sleeping'); facit is 3rd-io conjugation, 3rd person singular present active ('she/he makes'). Both translations are accurate.
Explanation: When identifying Latin verb conjugations, your two main tools are the infinitive form and the key vowel patterns in conjugated forms. This question tests whether you can distinguish 4th conjugation verbs from 3rd-io verbs — a notoriously tricky pair. Here's the key: dormire (to sleep) is a 4th conjugation verb, recognizable by its -īre infinitive with a long i. Facere (to make/do) is 3rd-io, recognizable by its -ere infinitive combined with an i that appears in most present tense forms. In the sentence, dormiunt (3rd person plural, present active) correctly translates as "they are sleeping," and facit (3rd person singular, present active) correctly translates as "she makes." This makes C the correct answer — dormiunt is 4th conjugation and facit is 3rd-io, with both translations accurate. Answer A gets dormiunt right (4th conjugation) but misidentifies facit as plain 3rd conjugation. Facio belongs to 3rd-io, not regular 3rd — a common mix-up since both use -ere infinitives. Answer B misidentifies dormiunt as 3rd-io when the -īre infinitive clearly marks it as 4th conjugation, and also wrongly calls facit plain 3rd conjugation — two errors in one. Answer D correctly identifies facit as 3rd-io but wrongly labels dormiunt as 3rd-io instead of 4th. Your study tip: always look up the infinitive when classifying verbs. The -īre vs. -ere distinction separates 4th from 3rd/3rd-io — don't let the i in conjugated 4th-conjugation forms trick you into calling them 3rd-io.

Question 12

A Latin passage contains the following clause: Rex fines regit et populum audit.

Which of the following correctly identifies the conjugation of both verbs and translates the clause accurately?

  1. Regit is 3rd-io conjugation, 3rd person singular present active ('rules/governs'); audit is 4th conjugation, 3rd person singular present active ('hears/listens to'). The clause means: 'The king rules the borders and listens to the people.'
  2. Regit is 3rd conjugation, 3rd person singular present active ('rules/governs'); audit is 4th conjugation, 3rd person singular present active ('hears/listens to'). The clause means: 'The king rules the borders and listens to the people.' (correct answer)
  3. Regit is 3rd conjugation, 3rd person singular present active ('rules/governs'); audit is 3rd-io conjugation, 3rd person singular present active ('hears/listens to'). The clause means: 'The king rules the borders and hears the people.'
  4. Regit is 4th conjugation, 3rd person singular present active ('rules/governs'); audit is 3rd-io conjugation, 3rd person singular present active ('hears/listens to'). The clause means: 'The king governs the borders and listens to the people.'
Explanation: When identifying Latin verb conjugations, the key is knowing each verb's principal parts — specifically the infinitive form, which reveals the conjugation. The present tense ending -it (3rd person singular) appears across multiple conjugations, so you can't rely on that alone. Take regit, from rego, regere — the infinitive regere has a short -e- stem with no -i- before it, marking it as 3rd conjugation. Now take audit, from audio, audire — the infinitive audire has a long -i- stem, which is the signature of 4th conjugation. Both verbs are 3rd person singular present active, meaning the subject (Rex, "the king") is performing each action. Fines (accusative plural of finis) means "borders/boundaries," and populum (accusative singular) means "the people." This gives you: "The king rules the borders and listens to the people." — confirming B is correct. Answer A misidentifies regit as 3rd-io conjugation. Third-io verbs (like capio, capere) are a subset of 3rd conjugation, but rego doesn't follow that pattern — its infinitive ends in -ere without the inserted -i- characteristic of 3rd-io. Answer C makes the reverse error, calling audit 3rd-io instead of 4th. The infinitive audire with its long -i- is unmistakably 4th conjugation, not 3rd-io. Answer D misidentifies regit as 4th conjugation entirely, which would require an infinitive ending in -ire — but regere has no such ending. Study tip: Always memorize principal parts, especially the infinitive. The infinitive is your conjugation decoder — drill it for every new verb you encounter.

Question 13

The verb iacere appears in a Latin text. A student translates a derived form as 'they are throwing.' Which form would produce this translation, and to which conjugation does it belong?

  1. iaciunt; the verb iacio belongs to the 3rd-io conjugation, as confirmed by its infinitive iacere with a short -e-, and -iunt is the 3rd person plural present active ending shared by 3rd-io verbs. (correct answer)
  2. iaciunt; the verb iacio belongs to the 4th conjugation, as confirmed by the -iunt ending in the 3rd person plural, which is the exclusive marker of 4th conjugation present active forms.
  3. iaciunt; the verb iacio belongs to the 3rd conjugation (not 3rd-io), because its infinitive ends in -ere and all -ere infinitives are regular 3rd conjugation regardless of the 1st principal part.
  4. iacient; the verb iacio belongs to the 3rd-io conjugation, and the future active 3rd person plural form iacient is the correct way to express 'they are throwing' in a vivid or present context in Latin.
Explanation: When you encounter a Latin verb question like this, your first move should be to identify the conjugation by examining both the 1st principal part and the infinitive together — neither alone tells the full story. The verb here is iacio (1st principal part) with infinitive iacere. That short -e- in the infinitive signals 3rd conjugation territory, but the -io ending on the 1st principal part marks it specifically as 3rd-io — a subgroup that blends 3rd and 4th conjugation features. For 'they are throwing' in the present active, you need the 3rd person plural form. Both 3rd-io and 4th conjugation verbs use the ending -iunt in this slot, giving you iaciunt. This makes A correct: the form is iaciunt, and iacio is properly classified as 3rd-io, confirmed by the short -e- infinitive combined with the -io first person singular. B is tempting precisely because -iunt appears in 4th conjugation verbs like audiunt. However, 4th conjugation infinitives end in -īre (long -i-), not -ere. The -iunt ending is shared, not exclusive to 4th conjugation — a critical distinction B gets wrong. C makes the error of assuming any infinitive in -ere automatically means regular 3rd conjugation. The 1st principal part iacio (-io ending) overrides that assumption and signals 3rd-io status. D confuses tenses entirely. Iacient is the future active form, meaning 'they will throw' — not 'they are throwing,' which is present tense. Study tip: Always check both the 1st principal part and the infinitive to pin down conjugation. If you see -io + short -ere, think 3rd-io immediately.