| SINGULAR | Decl I | Decl II | Decl III | Decl IV | Decl V |
| Nominative | -a | -us, -er / -um (n.) | -∞ / -∞ (n.) | -us / -ū (n.) | -ēs |
| Genitive | -ae | -ī | -is | -ūs | -ēī |
| Dative | -ae | -ō | -ī | -uī / -ū (n.) | -ēī |
| Accusative | -am | -um | -em / -∞ (n.) | -um / -ū (n.) | -em |
| Ablative | -ā | -ō | -e | -ū | -ē |
| PLURAL | Decl I | Decl II | Decl III | Decl IV | Decl V |
| Nominative | -ae | -ī / -a (n.) | -ēs / -a (n.) | -ūs / -ua (n.) | -ēs |
| Genitive | -ārum | -ōrum | -um / -ium | -uum | -ērum |
| Dative | -īs | -īs | -ibus | -ibus | -ēbus |
| Accusative | -ās | -ōs / -a (n.) | -ēs / -a (n.) | -ūs / -ua (n.) | -ēs |
| Ablative | -īs | -īs | -ibus | -ibus | -ēbus |
| SG. | Decl I | Decl II | Decl III | Decl IV | Decl V |
| Nom | port-a |
amīc-us, pu-er, ag-er / dōn-um (n.) |
rēx, civis, urbs / corpus, mare (n.) |
frūct-us / corn-ū (n.) |
di-ēs |
| Gen | port-ae |
amīc-ī, puer-ī, agr-ī / dōn-ī (.n) |
rēg-is, cīv-is, urb-is, / corpor-is, mar-is (n.) |
frūct-ūs / corn-ūs(n.) |
di-ēī |
| Dat | port-ae |
amīc-ō, puer-ō, agr-ō / dōn-ō (.n) |
rēg-ī, cīv-ī, urb-ī, / corpor-ī, mar-ī (n.) |
frūct-uī / corn-ū(n.) |
di-ēī |
| Acc | port-am |
amīc-um, puer-um, agr-um / dōn-um (n.) |
rēg-em, civ-em, urb-em / corpus, mar-e (n.) |
frūct-um / corn-ū (n.) |
di-em |
| Abl | port-ā |
amīc-ō, puer-ō, agr-ō / dōn--ō (.n) |
rēg-e, cīv-e, urb-e, / corpor-e, mar-ī (n.) |
frūct-ū / corn-ū(n.) |
di-ē |
| PL. | Decl I | Decl II | Decl III | Decl IV | Decl V |
| Nom | port-ae |
amīc-ī, puer-ī, agr-ī / dōn-a (.n) |
rēg-ēs, cīv-ēs, urb-ēs, / corpor-a, mar-ia (n.) |
frūct-ūs / corn-ua(n.) |
di-ēs |
| Gen | port-ārum |
amīc-ōrum, puer-ōrum, agr-ōrum / dōn-ōrum (.n) |
rēg-um, cīv-ium, urb-ium, / corpor-um, mar-ium (n.) |
frūct-uum / corn-uum(n.) |
di-ērum |
| Dat | port-īs |
amīc-īs, puer-īs, agr-īs / dōn-īs (.n) |
rēg-ibus, cīv-ibus, urb-ibus, / corpor-ibus, mar-ibus (n.) |
frūct-ibus / corn-ibus(n.) |
di-ēbus |
| Acc | port-ās |
amīc-ōs, puer-ōs, agr-ōs / dōn-a (.n) |
rēg-ēs, cīv-ēs, urb-ēs, / corpor-a, mar-ia (n.) |
frūct-ūs / corn-ua(n.) |
di-ēs |
| Abl | port-īs |
amīc-īs, puer-īs, agr-īs / dōn-īs (.n) |
rēg-ibus, cīv-ibus, urb-ibus, / corpor-ibus, mar-ibus (n.) |
frūct-ibus / corn-ibus(n.) |
di-ēbus |
Vocative case has the same form as nominative case, except for 2nd declension nouns with suffices -us and -ius in the nominative case. For those with -us, the vocative case is -e. for those with -ius, the vocative is simply -i. |