---
title: "Perfect Tense — AP Latin Definition & Exam Guide"
description: "The perfect tense marks a completed past action in Latin (\"did\" or \"has done\"). Tense accuracy is graded on AP Latin translation FRQs, so know your perfect stems."
canonical: "https://fiveable.me/ap-latin/key-terms/perfect-tense"
type: "key-term"
subject: "AP Latin"
---

# Perfect Tense — AP Latin Definition & Exam Guide

## Definition

In AP Latin, the perfect tense describes a completed past action, translated "did" or "has done." It's built on a verb's third principal part (the perfect stem) plus the endings -i, -isti, -it, -imus, -istis, -erunt, and tense accuracy is directly graded on translation FRQs.

## What It Is

The perfect tense is Latin's "done and finished" past [tense](/ap-latin/key-terms/tense "fv-autolink"). Where the imperfect paints an ongoing scene ("he was walking"), the perfect reports a completed event ("he walked" or "he has walked"). You spot it by the perfect stem, which comes from a [verb](/ap-latin/unit-4 "fv-autolink")'s third principal part, plus the signature endings -i, -isti, -it, -imus, -istis, -erunt (so *amavit* means "he loved / he has loved").

Two wrinkles matter for the AP syllabus authors. First, the perfect passive is a compound form built from the fourth principal part plus a form of *sum* (*captus est*, "he was captured"), and that same [participle](/ap-latin/key-terms/participle "fv-autolink") powers constructions like the ablative absolute. Second, poetry plays with the forms. Vergil regularly uses the alternate third-person plural ending *-ere* instead of *-erunt* (*dixere* = *dixerunt*) and syncopated forms that drop syllables. If you only know the textbook endings, the Aeneid will trip you up.

## Why It Matters

Tense recognition is one of the most directly graded skills in [AP Latin](/ap-latin "fv-autolink"). The translation free-response questions ask you to translate "as literally as possible," and the scoring guidelines award credit segment by segment. Render a perfect verb as "was doing" instead of "did" and you lose the point for that segment, even if you understood the gist. Caesar's narrative prose runs on the perfect tense (he reports completed military actions one after another), while [Vergil](/ap-latin/unit-3 "fv-autolink") shifts between perfect, imperfect, and the historical present for storytelling effect. Noticing those shifts is exactly the kind of evidence you cite when an analysis question asks how an author builds a scene. A released short-answer question from the 2017 exam also asked about the perfect tense directly, so the form itself, not just the translation, is fair game.

## Connections

### [Ablative Absolute (Units 2, 4, 6, 8)](/ap-latin/key-terms/ablative-absolute)

The most common [ablative absolute](/ap-latin/key-terms/ablative-absolute "fv-autolink") uses the perfect passive participle, the same fourth principal part the perfect passive is built on. *His rebus cognitis* means "with these things having been learned," and Caesar uses this move constantly to compress a completed action into a phrase before the main verb.

### [Subjunctive Mood (Units 1-8)](/ap-latin/key-terms/subjunctive-mood)

The perfect has subjunctive forms too (perfect active subjunctive adds -eri- to the perfect [stem](/ap-latin/key-terms/stem "fv-autolink")), and sequence of tenses decides when you need them. A perfect-tense main verb usually triggers secondary sequence in the clause that follows, so identifying the main verb's tense is step one in untangling indirect questions and purpose clauses.

### Active Voice (Units 1-8)

[Voice](/ap-latin/key-terms/voice "fv-autolink") changes how the perfect is even formed. Perfect active is one word from the third principal part (*cepit*, "he took"), but perfect passive is two words from the fourth principal part plus *sum* (*captus est*, "he was taken"). If you see a participle plus a form of *sum*, think perfect passive before anything else.

## On the AP Exam

Multiple-choice translation questions love to offer answer choices that differ only by tense, so the verb ending is the whole question. A stem like "How is *studium favorque transibit* best translated?" works exactly this way. *Transibit* is future ("will pass"), and the perfect form *transiit* ("passed") sits there as the tempting wrong answer for anyone skimming the ending. On the free-response side, the literal translation questions grade tense explicitly. "He has come" earns the segment for *venit* (perfect); "he was coming" does not. Short-answer questions on the syllabus passages can also ask you to identify a verb's tense and form outright, as a 2017 question did, so be ready to name the perfect and explain how you know.

## Perfect Tense vs Imperfect tense

Both are past tenses, but the perfect reports a completed action ("he walked," "he has walked") while the imperfect describes an ongoing, repeated, or attempted past action ("he was walking," "he used to walk"). The forms look different too. Imperfect uses the present stem plus -ba- (*ambulabat*), while perfect uses the third principal part (*ambulavit*). On translation FRQs, swapping one for the other costs you the segment.

## Key Takeaways

- The perfect tense expresses a completed past action and translates as "did" or "has done," never "was doing."
- Perfect active forms come from the verb's third principal part plus the endings -i, -isti, -it, -imus, -istis, -erunt.
- The perfect passive is two words, the perfect passive participle plus a form of *sum*, as in *captus est* ("he was captured").
- Vergil often uses the alternate ending -ere for -erunt (*dixere* = "they said"), so don't mistake it for a present infinitive.
- On AP Latin translation FRQs, tense is graded segment by segment, so rendering a perfect verb with imperfect meaning loses the point.
- A perfect-tense main verb usually puts subordinate subjunctive clauses into secondary sequence.

## FAQs

### What is the perfect tense in Latin?

It's the tense for completed past actions, translated "did" or "has done." You form the active from the verb's third principal part plus the endings -i, -isti, -it, -imus, -istis, -erunt, so *amavit* means "he loved" or "he has loved."

### What's the difference between the perfect and imperfect tense in Latin?

Perfect is a completed snapshot ("he walked"); imperfect is an ongoing or repeated past action ("he was walking, he kept walking"). Imperfect uses the present stem with -ba- (*ambulabat*), perfect uses the perfect stem (*ambulavit*), and AP translation rubrics treat them as different answers.

### Is "he was captured" perfect or imperfect in Latin?

Perfect. *Captus est* is the perfect passive, built from the perfect passive participle plus *sum*. It looks like a present-tense *est*, but the compound form means a completed past action, which is a classic AP trap.

### What does the -ere ending mean in Vergil?

In the Aeneid, -ere is often the alternate third-person plural perfect ending, so *dixere* equals *dixerunt*, "they said." It looks identical to a present active infinitive of some verbs, so check the stem. If it's the perfect stem, it's perfect tense.

### Does the AP Latin exam actually grade verb tense in translations?

Yes. The literal translation FRQs are scored segment by segment, and getting the tense wrong forfeits that segment's credit. Multiple-choice questions also offer answer choices that differ only by tense, like "will pass" versus "passed."

## Related Study Guides

- [Multiple-Choice Questions (MCQ)](/ap-latin/ap-latin-exam/ap-latin-mcq/study-guide/ap-latin-mcq)

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