The Latin perfect active indicative presents an event or change as a complete whole. Depending on context, scrīpsī can mean “I wrote” or “I have written.” English splits those translations between its simple past and present perfect; Latin uses one tense and lets context show whether the completed event belongs to a past narrative or remains relevant now.
The form is built from the third principal part, not from the present infinitive. This is why scrībō, scrībere has perfect scrīpsī, and regō, regere has perfect rēxī. The perfect is active because the grammatical subject performs or experiences the event, and indicative because the speaker presents it as actual.
Find the perfect stem
Remove final -ī from the first-person singular perfect, the third principal part:
| Dictionary entry | Third principal part | Perfect stem |
|---|---|---|
| laudō, laudāre, laudāvī, laudātum | laudāvī | laudāv- |
| moneō, monēre, monuī, monitum | monuī | monu- |
| regō, regere, rēxī, rēctum | rēxī | rēx- |
| capiō, capere, cēpī, captum | cēpī | cēp- |
| audiō, audīre, audīvī, audītum | audīvī | audīv- |
The perfect-stem shapes vary, but all take the same active endings. That is the payoff of principal parts: unpredictability is concentrated in the dictionary entry; the personal paradigm is then regular.
The six active endings
| Person | Ending | laudāv- | Translation |
|---|---|---|---|
| 1st singular | -ī | laudāvī | I praised / have praised |
| 2nd singular | -istī | laudāvistī | you praised / have praised |
| 3rd singular | -it | laudāvit | he/she/it praised / has praised |
| 1st plural | -imus | laudāvimus | we praised / have praised |
| 2nd plural | -istis | laudāvistis | you all praised / have praised |
| 3rd plural | -ērunt | laudāvērunt | they praised / have praised |
These are perfect endings, not the ordinary present active set -ō/-m, -s, -t, -mus, -tis, -nt. The sequence -istī is particularly diagnostic. Third-person plural -ēre also occurs for -ērunt, especially in narrative and poetry (literary): laudāvēre. It is an active finite ending, not an infinitive.
Epistulam scrīpsī et nūntium iam mīsī.
I wrote the letter and have already sent the message.
Cūr tam celeriter discessistī?
Why did you leave so quickly?
Hospitēs ad portam advēnērunt.
The guests arrived at the gate.
Omnia parāvimus; nunc proficīscī possumus.
We have prepared everything; now we can set out.
The first clause of the last example has a clear present result: the preparations are complete now. The arrival example instead advances a past account. Latin morphology is the same perfect in both uses.
Two common English translations, one Latin viewpoint
In a past narrative, the perfect normally corresponds to the English simple past and moves the sequence of events forward:
Dux signum dedit, mīlitēs cucurrērunt, hostēs fūgērunt.
The commander gave the signal, the soldiers ran, and the enemy fled.
Each perfect presents its event from the outside as a whole. By contrast, the imperfect supplies an ongoing, habitual, or background view:
Dum mīlitēs currēbant, dux signum alterum dedit.
While the soldiers were running, the commander gave a second signal.
Here currēbant opens a background situation; perfect dedit introduces a bounded event within it. This distinction is a narrative viewpoint, not simply English “was” versus “did.” Stative verbs may use an English simple past even when the Latin tense is imperfect, and a perfect may have a continuing present consequence. See Perfect versus Imperfect Narrative Viewpoint for the full contrast.
In conversation and correspondence (neutral Classical prose), the perfect can report a completed action that matters now:
Clāvem invēnī; iānuam aperīre iam possumus.
I have found the key; now we can open the door.
Hunc librum lēgistīne?
Have you read this book?
Latin has no rule matching the modern English restriction against a present perfect with a finished-time phrase. A Latin perfect can occur with herī “yesterday” and still be perfectly ordinary. Choose the English rendering that is idiomatic for its context.
Voice and mood diagnostics
Perfect active endings express active voice in one word. The perfect passive uses a perfect passive participle plus a form of sum: laudātus est “he was/has been praised,” laudāta est “she was/has been praised.” Do not attach active endings to a passive participle.
Iūlia Mārcum laudāvit; Iūlia quoque ā magistrā laudāta est.
Julia praised Marcus; Julia too was praised by the teacher.
Both clauses are perfect indicative, but laudāvit is active and finite by itself; laudāta est is a two-word passive form with feminine agreement.
Some perfect indicative forms resemble forms elsewhere in the system. Lēgerit may be future perfect indicative or perfect subjunctive, not ordinary perfect indicative. Lēgit, by contrast, can be present “he reads” or perfect “he read/has read” when macrons are absent; pedagogical quantity distinguishes present legit from perfect lēgit. Clause meaning and the verb’s principal parts confirm the parse.
Contraction and alternative forms
Perfect stems in -v- can lose v and a following vowel in contracted forms: laudāvistī may appear as laudāstī, and audīvistis as audīstis. Such syncopated forms are genuinely Classical and occur in prose as well as verse; they are not mistakes, though an uncontracted form is usually clearest for early production. Perfect third plural -ēre is especially associated with elevated narrative and verse (literary).
Never assume that every short-looking form is contracted. Restore a plausible perfect stem and ending, then verify it against the principal parts. The dedicated Perfect Stems in -v- and -u- page explains these patterns in detail.
Common Mistakes
1. Building the perfect from the English past or present infinitive. The third principal part controls the stem.
❌ Annō superiōre provinciam reguī.
Incorrect — the perfect of regō is supplied by rēxī, not invented from regere.
✅ Annō superiōre provinciam rēxī.
Last year I governed the province.
2. Using present personal endings on a perfect stem. Perfect active has its own set.
❌ Nūntium scrīpsō.
Incorrect — scrīps- does not combine with present first-person -ō here.
✅ Nūntium scrīpsī.
I wrote the message; I have written the message.
3. Copying the English auxiliary into Latin. Latin does not form this tense with habeō plus a participle.
❌ Herī habeō eum vīsum.
Incorrect for ‘yesterday I saw him’ — this word-for-word assembly is not the Latin perfect active.
✅ Herī eum vīdī.
Yesterday I saw him.
4. Forming the perfect passive with an active perfect. Use an agreeing participle plus sum.
❌ Puella laudāvit est.
Incorrect — laudāvit is already finite and active.
✅ Puella laudāta est.
The girl was praised; the girl has been praised.
5. Reading literary -ēre as an infinitive. Its clause position and perfect stem identify a finite plural.
❌ Mīlitēs veniēre.
Incorrect — the alternative third-person plural is built on perfect stem vēn- as vēnēre.
✅ Mīlitēs vēnēre.
The soldiers came. (literary)
Key Takeaways
Take the perfect stem from the third principal part and add -ī, -istī, -it, -imus, -istis, -ērunt. Interpret the perfect as a completed whole, using English simple past in narrative and English present perfect when a present result is prominent. Keep active scrīpsit separate from passive scrīptus est, and let Latin morphology lead the analysis before English tense choices enter.
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Start learning Latin →Related Topics
- Present, Perfect, and Supine StemsA1 — Map Latin’s three principal stem families to the tense, voice, and non-finite forms each family builds.
- Perfect Stems in -v- and -u-A2 — Recognize productive v-perfects and u-perfects, derive their perfect-system forms, and handle Classical contraction accurately.
- Perfect Stems in -s-A2 — Recognize s-perfects behind spellings such as scrīpsī, dūxī, clausī, and mīsī and use their stems across the perfect system.
- Pluperfect Active IndicativeA2 — Form the pluperfect active indicative from the perfect stem and use it for an event completed before a past reference point.
- Perfect versus Imperfect Narrative ViewpointA2 — Choose between completed foreground events and ongoing, habitual, attempted, or descriptive past situations.