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

5. 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.

6. 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

7. 1st declension -
Via, viae, f., road
2nd declension –
Vir, viri, m. man
3rd declension
Pater, patris, m. father