The Latin imperfect indicative presents a past situation from inside, without making its endpoint the focus. It commonly means “was doing,” “used to do,” or “kept doing,” but English sometimes uses a simple past, especially with states: sciēbat is normally “he knew,” not awkward “he was knowing.” Its forms are unusually friendly: every regular conjugation has a visible -bā- tense marker.
The imperfect belongs to the present system. It is built from the present-system stem, not from the perfect principal part. It has active and passive forms, and it is indicative because the speaker presents the past situation as actual rather than wished, commanded, or merely possible.
The formation map
| Conjugation | Present infinitive | Imperfect base | 1st singular |
|---|---|---|---|
| 1st | laudāre | laudābā- | laudābam, I was praising |
| 2nd | monēre | monēbā- | monēbam, I was warning |
| 3rd | regere | regēbā- | regēbam, I was ruling |
| 3rd-iō | capere | capiēbā- | capiēbam, I was taking |
| 4th | audīre | audiēbā- | audiēbam, I was hearing |
First and second conjugations preserve their characteristic ā and ē before -bā-. The third conjugation uses -ēbā-, even though its infinitive has short -ere. Third-iō and fourth-conjugation verbs use -iēbā-. This contrast is important: regēbam, but capiēbam and audiēbam.
The marker is conventionally cited as -bā-, but vowel quantity is shortened in some surface endings. Pedagogical forms therefore show laudābam, laudābat, and laudābant, alongside laudābās, laudābāmus, and laudābātis. Learn the actual written forms, not a mechanically concatenated formula.
Active endings in all persons
| Person | 1st: laudō | 2nd: moneō | 3rd: regō | 3rd-iō: capiō | 4th: audiō |
|---|---|---|---|---|---|
| 1st singular | laudābam | monēbam | regēbam | capiēbam | audiēbam |
| 2nd singular | laudābās | monēbās | regēbās | capiēbās | audiēbās |
| 3rd singular | laudābat | monēbat | regēbat | capiēbat | audiēbat |
| 1st plural | laudābāmus | monēbāmus | regēbāmus | capiēbāmus | audiēbāmus |
| 2nd plural | laudābātis | monēbātis | regēbātis | capiēbātis | audiēbātis |
| 3rd plural | laudābant | monēbant | regēbant | capiēbant | audiēbant |
The active endings are -m, -s, -t, -mus, -tis, -nt. The first-person singular uses -m, not present-indicative -ō. Thus laudō means “I praise,” but laudābam means “I was praising / used to praise.”
Dum cēnam parābam, frāter epistulam scrībēbat.
While I was preparing dinner, my brother was writing a letter.
Cotīdiē ad flūmen ambulābāmus.
Every day we used to walk to the river.
Puerī in hortō lūdēbant, sed pater labōrābat.
The boys were playing in the garden, but their father was working.
Omnēs magistrum audiēbant.
Everyone was listening to the teacher.
What the imperfect viewpoint contributes
The imperfect does not simply mean “past.” It presents an action as ongoing, repeated, attempted, or as background to another event. The perfect usually views a past event as a complete whole. Compare:
Dux mīlitēs convocābat cum nūntius vēnit.
The commander was calling the soldiers together when a messenger arrived.
Here convocābat supplies the open background; vēnit presents the messenger’s arrival as a bounded event. The imperfect does not claim that the summoning ended or succeeded. This contrast structures narrative in (neutral Classical prose) and is especially prominent in historical and literary writing (literary).
Vergil opens a new narrative movement with the same foreground-background contrast (literary): perfect conticuere presents the completed falling silent, while imperfect tenebant holds the audience in an ongoing pose. The attributed line is reproduced without added macrons.
Conticuere omnes intentique ora tenebant.
All fell silent and, intent, kept their faces fixed. — Vergil, Aeneid 2.1 (literary)
Repeated past activity also invites the imperfect:
Aestāte saepe in flūmine natābāmus.
In summer we often used to swim in the river.
With states, the best English translation is frequently a simple past:
Rōmae habitābat et multōs amīcōs habēbat.
She lived in Rome and had many friends.
“Was living” is possible, but “was having many friends” is normally unnatural English. The Latin morphology remains imperfect in both clauses. Tense labels describe the Latin viewpoint, not a mandatory English auxiliary.
The imperfect can also be conative: it presents an attempted action in progress without asserting success. This use is common in narrative (literary) but also fully ordinary prose.
Portam aperiēbam, sed clāvis nōn movēbātur.
I was trying to open the gate, but the key would not move.
For a fuller choice between the two past viewpoints, see Perfect versus Imperfect Narrative Viewpoint.
The passive imperfect
Replace the active endings with passive endings while keeping the same imperfect base: -bar, -bāris (or -bāre), -bātur, -bāmur, -bāminī, -bantur. A first-conjugation sample is laudābar, laudābāris, laudābātur, laudābāmur, laudābāminī, laudābantur.
Librī in tabernā vēndēbantur.
Books were being sold in the shop.
Porta ā servīs aperiēbātur.
The gate was being opened by the enslaved workers.
These forms express a patient undergoing an ongoing or repeated past action. Vēndēbant means “they were selling”; vēndēbantur means “they were being sold.” The passive endings, not English word order, establish that difference. The dedicated Imperfect Passive Indicative page develops the full set.
Important irregular verbs
The regular -bā- map does not cover every high-frequency verb. Sum has eram, erās, erat, erāmus, erātis, erant. Its compounds preserve that pattern: possum has poteram, poterās, and so on. Other common imperfects include ībam from eō, ferēbam from ferō, volēbam from volō, nōlēbam from nōlō, and mālēbam from mālō.
These are lexical exceptions, not alternative conjugation rules. The principal parts and present identity tell you which irregular family a verb belongs to. For a regular verb, start from its present-system pattern; never take the perfect stem and add -bā-.
Common Mistakes
1. Using short i instead of ē in the third conjugation. The imperfect of regō has -ēbā-.
❌ Rēx urbem regībat.
Incorrect — regībat does not show the third-conjugation imperfect pattern.
✅ Rēx urbem regēbat.
The king was ruling the city.
2. Using a chiefly poetic contraction as the regular prose form. Third-iō and fourth-conjugation verbs regularly use -iēbā-; ancient -ībā- forms occur chiefly in poetry.
❌ Puer mūsicam audībat.
Not the ordinary prose form — audībat is an attested chiefly poetic contraction of audiēbat.
✅ Puer mūsicam audiēbat.
The boy was listening to music.
3. Copying the English progressive with sum plus a participle. Latin normally expresses this past viewpoint in one finite imperfect.
❌ Eram labōrāns cum vēnistī.
Incorrect as a routine word-for-word rendering of ‘I was working.’
✅ Labōrābam cum vēnistī.
I was working when you came.
4. Confusing active and passive endings. Decide whether the subject performs or receives the action.
❌ Porta aperiēbat.
Incorrect for ‘the gate was being opened’ — this active form makes the gate the opener.
✅ Porta aperiēbātur.
The gate was being opened.
5. Assuming every English simple past requires a Latin perfect. States and habits commonly use the imperfect.
❌ Puer Rōmae habitāvit cotīdiē.
Incorrect for the intended continuing habit — the perfect presents the residence as a bounded whole.
✅ Puer Rōmae habitābat.
The boy lived in Rome; the boy used to live in Rome.
Key Takeaways
Build the regular imperfect from the present system: -ābā- in the first conjugation, -ēbā- in the second and third, and -iēbā- in third-iō and fourth. Then add active or passive personal endings. Interpret the resulting form by viewpoint—ongoing, repeated, backgrounded, or attempted—rather than forcing a one-to-one match with English “was.”
Now practice Latin
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Start learning Latin →Related Topics
- Present Indicative of Volo, Nolo, and MaloA1 — Form and distinguish volō, nōlō, and mālō in the present indicative when expressing wanting, unwillingness, and preference.
- Future Indicative of First and Second ConjugationsA1 — Form and interpret the b-future of first- and second-conjugation verbs in both active and passive voice.
- Perfect versus Imperfect Narrative ViewpointA2 — Choose between completed foreground events and ongoing, habitual, attempted, or descriptive past situations.
- Imperfect Passive IndicativeA2 — Form and interpret the Latin imperfect passive as an ongoing, habitual, or attempted past event viewed from the receiver's perspective.
- Person and Number EndingsA1 — Read Latin verb endings as compact signals of who acts, how many participants act, and whether the subject acts or is acted upon.