1. 4th Declension Nouns (Page 227)
4th Declension nouns are Masculine and Neuter. Masculine nouns have a nominative
ending in us. Neuter nouns have a nominative ending in u.The genitive ending of all
nouns of the 4th Declension is us
impetus impetus m. attack cornu cornus n. horn, wing of an army
Masculine Neuter
Endings Endings
Nom. impetus us cornu u
Gen. impetus us cornus us
Dat. impetui ui cornu u
Acc. impetum um cornu u
Abl. impetu u cornu u
Nom. impetus us cornua ua
Gen. impetuum uum cornuum uum
Dat. impetibus ibus cornibus ibus
Acc. impetus us cornua ua
Abl. impetibus ibus cornibus ibus

2. Accusative of Extent of Space (Page 228)
Words in Latin that answer the question how long ? (extent or length
of time) are in the accusative case without a preposition. Words that
answer the question how far? (extent of space, distance) are also
in the accusative case without a preposition.
EXTENT OF TIME: Octo annos Caesar in Gallia bellum gerebat.
How long? For eight years Caesar waged war in Gaul.
EXTENT OF SPACE: Castra decem pedes a muro posuerunt.
How far? They pitched camp ten feet from the wall.