1. Third Declension I-stem Nouns

2. What do these nouns have in common?
civis, civis (c)
hostis, hostis (m)
navis, navis (f)
That’s right! They’re identical in the nominative and genitive singular.

3. What do these nouns have in common?
urbs, urbis (f)
mons, montis (m)
nox, noctis (f)
Optime! The nominative singular is one syllable, AND the base ends in 2 consonants.
urbis
montis
noctis

4. What is an i-stem noun?
1) masculine and feminine nouns ending in -is or -es with the same number of syllables in the genitive singular
m./f. nouns of one syllable (with an ending of –s/-x whose base ends in two consonants

5. Which nouns below are i-stems?
1) masculine and feminine nouns ending in -is or -es with the same number of syllables in the genitive singular
m./f. nouns of one syllable (with an ending of –s/-x whose base ends in two consonants
pars, partis (f)
dens, dentis (m)
pastor, pastoris (m)
finis, finis (m)
consul, consulis (m)

6. Which nouns below are i-stems?
1) masculine and feminine nouns ending in -is or -es with the same number of syllables in the genitive singular
m./f. nouns of one syllable (with an ending of –s/-x whose base ends in two consonants
pars, partis (f)
dens, dentis (m)
pastor, pastoris (m)
finis, finis (m)
consul, consulis (m)

7. The ONLY difference between a regular 3rd declension noun and an i-stem is in the genitive plural: ium.

8. Masculine & Feminine N --- ēs G is um D ī ibus Acc em ēs Abl e ibus
Regular 3rd Declension Nouns
3rd Declension I-stem Nouns
Masculine & Feminine
N ēs
G is um
D ī ibus
Acc em ēs
Abl e ibus
Masculine & Feminine
N ēs
G is ium
D ī ibus
Acc em ēs
Abl e ibus

9. Decline civis, civis. Masculine & Feminine N --- ēs G is ium D ī ibus
Acc em ēs
Abl e ibus
Masculine & Feminine
N civis civēs
G civis civium
D civī civibus
Acc civem civēs
Abl cive civibus

10. Neuter I-stems
Neuters of the third declension ending in -e / -al / -ar in the nominative singular (e.g., mare / animal / exemplar).

11. Regular 3rd Neuter
N a
G is um
D ī ibus
Acc --- a
Abl e ibus
3rd Neuter I-stems
N ia
G is ium
D ī ibus
Acc --- ia
Abl ī ibus

12. Decline animal, animalis (n).
3rd Neuter I-stems
N animal animalia
G animalis animalium
D animalī animalibus
Acc animal animalia
Abl animalī animalibus
3rd Neuter I-stems
N ia
G is ium
D ī ibus
Acc --- ia
Abl ī ibus

13. Donabimus (an animal) (to the citizens).
Translate the verb. Then, write the correct Latin form for the underlined nouns.
Donabimus (an animal) (to the citizens).

14. Donabimus (an animal) (to the citizens).
Translate the verb. Then, write the correct Latin form for the underlined nouns.
Donabimus (an animal) (to the citizens).
We will give animal civibus.

15. (Five citizens) (by an animal) ad oppidum agebantur.
Translate the Latin. Then, write the correct Latin form for the underlined nouns.
(Five citizens) (by an animal) ad oppidum agebantur.

16. (Five citizens) (by an animal) ad oppidum agebantur.
Translate the Latin. Then, write the correct Latin form for the underlined nouns.
(Five citizens) (by an animal) ad oppidum agebantur.
Quinque civēs were driven to town animalī.

17. (Many animals) (of Roman citizens) in viīs ambulaverunt.
Translate the Latin. Then, write the correct Latin form for the underlined nouns.
(Many animals) (of Roman citizens) in viīs ambulaverunt.

18. Translate the Latin. Then, write the correct Latin form for the underlined nouns.
(Many animals) (of Roman citizens) in viīs ambulaverunt.
Multa animalia civium Romanōrum walked in the streets.

19. Review. 3rd declension i-stems: ium in genitive plural (masc. & fem.)
i in ablative singular; all plural endings begin with i (neut.)