observo: all forms
observo means “watch, observe; respect, comply with”. Below is its full conjugation in Latin.
Present active
Present active | Indicative | Subjunctive | Imperative |
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| 1st singular | observo | observem | |
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| 2nd singular | observas | observes | observa |
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| 3rd singular | observat | observet | |
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| 1st plural | observamus | observemus | |
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| 2nd plural | observatis | observetis | observate |
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| 3rd plural | observant | observent | |
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Present passive
Present passive | Indicative | Subjunctive | Imperative |
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| 1st singular | observor | observer | |
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| 2nd singular | observaris | observere · observeris | observare |
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| 3rd singular | observatur | observetur | |
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| 1st plural | observamur | observemur | |
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| 2nd plural | observamini | observemini | observamini |
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| 3rd plural | observantur | observentur | |
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Imperfect active
Imperfect active | Indicative | Subjunctive |
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| 1st singular | observabam | observarem |
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| 2nd singular | observabas | observares |
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| 3rd singular | observabat | observaret |
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| 1st plural | observabamus | observaremus |
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| 2nd plural | observabatis | observaretis |
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| 3rd plural | observabant | observarent |
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Imperfect passive
Imperfect passive | Indicative | Subjunctive |
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| 1st singular | observabar | observarer |
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| 2nd singular | observabare · observabaris | observarere · observareris |
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| 3rd singular | observabatur | observaretur |
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| 1st plural | observabamur | observaremur |
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| 2nd plural | observabamini | observaremini |
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| 3rd plural | observabantur | observarentur |
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Future active
Future active | Indicative | Imperative |
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| 1st singular | observabo | |
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| 2nd singular | observabis | observato |
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| 3rd singular | observabit | observato |
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| 1st plural | observabimus | |
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| 2nd plural | observabitis | observatote |
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| 3rd plural | observabunt | observanto |
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Future passive
Future passive | Indicative | Imperative |
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| 1st singular | observabor | |
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| 2nd singular | observabere · observaberis | observator |
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| 3rd singular | observabitur | observator |
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| 1st plural | observabimur | |
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| 2nd plural | observabimini | |
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| 3rd plural | observabuntur | observantor |
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Perfect active
Perfect active | Indicative | Subjunctive |
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| 1st singular | observavi | observaverim |
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| 2nd singular | observavisti | observaveris |
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| 3rd singular | observavit | observaverit |
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| 1st plural | observavimus | observaverimus |
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| 2nd plural | observavistis | observaveritis |
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| 3rd plural | observaverunt · observavere | observaverint |
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Pluperfect active
Pluperfect active | Indicative | Subjunctive |
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| 1st singular | observaveram | observavissem |
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| 2nd singular | observaveras | observavisses |
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| 3rd singular | observaverat | observavisset |
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| 1st plural | observaveramus | observavissemus |
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| 2nd plural | observaveratis | observavissetis |
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| 3rd plural | observaverant | observavissent |
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Future perfect active
Future perfect active | Indicative |
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| 1st singular | observavero |
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| 2nd singular | observaveris |
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| 3rd singular | observaverit |
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| 1st plural | observaverimus |
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| 2nd plural | observaveritis |
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| 3rd plural | observaverint |
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Infinitives
Infinitives | Active | Passive |
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| Present | observare | observari |
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| Perfect | observavisse | |
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Participles
Present active participle, singular | Neuter | Forms |
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| Nominative | | observans |
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| Genitive | | observantis |
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| Dative | | observanti |
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| Accusative | observans | observantem |
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| Ablative | | observante · observanti |
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| Vocative | | observans |
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Present active participle, plural | Neuter | Forms |
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| Nominative | observantia | observantes |
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| Genitive | | observantium |
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| Dative | | observantibus |
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| Accusative | observantia | observantes |
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| Ablative | | observantibus |
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| Vocative | observantia | observantes |
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Future active participle, singular | Masculine | Feminine | Neuter | Forms |
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| Nominative | observaturus | observatura | observaturum | |
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| Genitive | observaturi | observaturae | observaturi | |
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| Dative | observaturo | observaturae | observaturo | |
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| Accusative | observaturum | observaturam | observaturum | |
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| Ablative | observaturo | observatura | observaturo | |
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| Vocative | observature | observatura | observaturum | |
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Future active participle, plural | Masculine | Feminine | Neuter | Forms |
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| Nominative | observaturi | observaturae | observatura | |
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| Genitive | observaturorum | observaturarum | observaturorum | |
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| Dative | | | | observaturis |
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| Accusative | observaturos | observaturas | observatura | |
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| Ablative | | | | observaturis |
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| Vocative | observaturi | observaturae | observatura | |
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Perfect passive participle, singular | Masculine | Feminine | Neuter | Forms |
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| Nominative | observatus | observata | observatum | |
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| Genitive | observati | observatae | observati | |
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| Dative | observato | observatae | observato | |
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| Accusative | observatum | observatam | observatum | |
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| Ablative | observato | observata | observato | |
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| Vocative | observate | observata | observatum | |
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Perfect passive participle, plural | Masculine | Feminine | Neuter | Forms |
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| Nominative | observati | observatae | observata | |
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| Genitive | observatorum | observatarum | observatorum | |
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| Dative | | | | observatis |
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| Accusative | observatos | observatas | observata | |
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| Ablative | | | | observatis |
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| Vocative | observati | observatae | observata | |
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Gerund, gerundive and supine
Gerundive, singular | Masculine | Feminine | Neuter | Forms |
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| Nominative | observandus | observanda | observandum | |
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| Genitive | observandi | observandae | observandi | |
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| Dative | observando | observandae | observando | |
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| Accusative | observandum | observandam | observandum | |
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| Ablative | observando | observanda | observando | |
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| Vocative | observande | observanda | observandum | |
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Gerundive, plural | Masculine | Feminine | Neuter | Forms |
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| Nominative | observandi | observandae | observanda | |
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| Genitive | observandorum | observandarum | observandorum | |
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| Dative | | | | observandis |
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| Accusative | observandos | observandas | observanda | |
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| Ablative | | | | observandis |
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| Vocative | observandi | observandae | observanda | |
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Supine | Forms |
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| Accusative | observatum |
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| Ablative | observatu |
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Meaning and examples of observo
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.