e.g. villa, villae, f. house puella, puellae, f. girl

end in –us most of the time, but can end in –er or –ir.

e.g. amicus, amici, m. friend puer, pueri, m. boy

N.B. the genitive (the second word) always ends in –i.

Can end in anything. You identify them by the –is in the genitive, the second word listed.

e.g. canis, canis, m/f. dog mater, matris, f., mother

1st declension - Via, viae, f., road

2nd declension – Vir, viri, m. man

3rd declension Pater, patris, m. father