debeo: all forms
debeo means “owe; ought, must”. Below is its full conjugation in Latin.
Present active
Present active | Indicative | Subjunctive | Imperative |
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| 1st singular | debeo | debeam | |
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| 2nd singular | debes | debeas | debe |
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| 3rd singular | debet | debeat | |
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| 1st plural | debemus | debeamus | |
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| 2nd plural | debetis | debeatis | debete |
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| 3rd plural | debent | debeant | |
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Present passive
Present passive | Indicative | Subjunctive | Imperative |
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| 1st singular | debeor | debear | |
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| 2nd singular | deberis · debere | debearis | debere |
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| 3rd singular | debetur | debeatur | |
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| 1st plural | debemur | debeamur | |
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| 2nd plural | debemini | debeamini | debemini |
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| 3rd plural | debentur | debeantur | |
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Imperfect active
Imperfect active | Indicative | Subjunctive |
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| 1st singular | debebam | deberem |
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| 2nd singular | debebas | deberes |
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| 3rd singular | debebat | deberet |
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| 1st plural | debebamus | deberemus |
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| 2nd plural | debebatis | deberetis |
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| 3rd plural | debebant | deberent |
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Imperfect passive
Imperfect passive | Indicative | Subjunctive |
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| 1st singular | debebar | deberer |
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| 2nd singular | debebare · debebaris | deberere · debereris |
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| 3rd singular | debebatur | deberetur |
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| 1st plural | debebamur | deberemur |
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| 2nd plural | debebamini | deberemini |
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| 3rd plural | debebantur | deberentur |
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Future active
Future active | Indicative | Imperative |
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| 1st singular | debebo | |
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| 2nd singular | debebis | debeto |
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| 3rd singular | debebit | debeto |
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| 1st plural | debebimus | |
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| 2nd plural | debebitis | debetote |
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| 3rd plural | debebunt | debento |
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Future passive
Future passive | Indicative | Imperative |
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| 1st singular | debebor | |
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| 2nd singular | debebere · debeberis | debetor |
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| 3rd singular | debebitur | debetor |
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| 1st plural | debebimur | |
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| 2nd plural | debebimini | |
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| 3rd plural | debebuntur | debentor |
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Perfect active
Perfect active | Indicative | Subjunctive |
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| 1st singular | debui | debuerim |
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| 2nd singular | debuisti | debueris |
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| 3rd singular | debuit | debuerit |
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| 1st plural | debuimus | debuerimus |
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| 2nd plural | debuistis | debueritis |
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| 3rd plural | debuerunt · debuere | debuerint |
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Pluperfect active
Pluperfect active | Indicative | Subjunctive |
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| 1st singular | debueram | debuissem |
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| 2nd singular | debueras | debuisses |
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| 3rd singular | debuerat | debuisset |
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| 1st plural | debueramus | debuissemus |
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| 2nd plural | debueratis | debuissetis |
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| 3rd plural | debuerant | debuissent |
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Future perfect active
Future perfect active | Indicative |
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| 1st singular | debuero |
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| 2nd singular | debueris |
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| 3rd singular | debuerit |
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| 1st plural | debuerimus |
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| 2nd plural | debueritis |
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| 3rd plural | debuerint |
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Infinitives
Infinitives | Active | Passive |
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| Present | debere | deberi |
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| Perfect | debuisse | |
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Participles
Present active participle, singular | Neuter | Forms |
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| Nominative | | debens |
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| Genitive | | debentis |
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| Dative | | debenti |
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| Accusative | debens | debentem |
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| Ablative | | debente · debenti |
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| Vocative | | debens |
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Present active participle, plural | Neuter | Forms |
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| Nominative | debentia | debentes |
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| Genitive | | debentium |
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| Dative | | debentibus |
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| Accusative | debentia | debentes |
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| Ablative | | debentibus |
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| Vocative | debentia | debentes |
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Future active participle, singular | Masculine | Feminine | Neuter | Forms |
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| Nominative | debiturus | debitura | debiturum | |
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| Genitive | debituri | debiturae | debituri | |
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| Dative | debituro | debiturae | debituro | |
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| Accusative | debiturum | debituram | debiturum | |
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| Ablative | debituro | debitura | debituro | |
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| Vocative | debiture | debitura | debiturum | |
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Future active participle, plural | Masculine | Feminine | Neuter | Forms |
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| Nominative | debituri | debiturae | debitura | |
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| Genitive | debiturorum | debiturarum | debiturorum | |
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| Dative | | | | debituris |
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| Accusative | debituros | debituras | debitura | |
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| Ablative | | | | debituris |
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| Vocative | debituri | debiturae | debitura | |
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Perfect passive participle, singular | Masculine | Feminine | Neuter | Forms |
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| Nominative | debitus | debita | debitum | |
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| Genitive | debiti | debitae | debiti | |
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| Dative | debito | debitae | debito | |
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| Accusative | debitum | debitam | debitum | |
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| Ablative | debito | debita | debito | |
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| Vocative | debite | debita | debitum | |
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Perfect passive participle, plural | Masculine | Feminine | Neuter | Forms |
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| Nominative | debiti | debitae | debita | |
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| Genitive | debitorum | debitarum | debitorum | |
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| Dative | | | | debitis |
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| Accusative | debitos | debitas | debita | |
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| Ablative | | | | debitis |
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| Vocative | debiti | debitae | debita | |
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Gerund, gerundive and supine
Gerundive, singular | Masculine | Feminine | Neuter | Forms |
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| Nominative | debendus | debenda | debendum | |
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| Genitive | debendi | debendae | debendi | |
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| Dative | debendo | debendae | debendo | |
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| Accusative | debendum | debendam | debendum | |
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| Ablative | debendo | debenda | debendo | |
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| Vocative | debende | debenda | debendum | |
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Gerundive, plural | Masculine | Feminine | Neuter | Forms |
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| Nominative | debendi | debendae | debenda | |
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| Genitive | debendorum | debendarum | debendorum | |
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| Dative | | | | debendis |
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| Accusative | debendos | debendas | debenda | |
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| Ablative | | | | debendis |
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| Vocative | debendi | debendae | debenda | |
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Supine | Forms |
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| Accusative | debitum |
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| Ablative | debitu |
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Meaning and examples of debeo
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.