Accusative Case

Vītam regit fortūna, nōn sapientia.
Regit fortuna.
Semper regit fortuna.
Vitam regit fortuna.
Vitam semper regit fortuna.
Viros sapientiam docet fortuna.
Enumerat miles vulnera, pastor oves.

SIMPLIFIED TABLE

(accusative only)

	Decl I	Decl II	Decl IIII	Decl IV	Decl V
Accusative Singular	-am	-um	-em	-um	-em
Accusative Plural	-ās	-ōs	-ēs	-ūs	-ēs

TABLE WITH NOMINATIVE & ACCUSATIVE

	Decl I	Decl II	Decl IIII	Decl IV	Decl V
Nominative Singular	-a	-us, -er / -um (n.)	-∞ / -∞ (n.)	-ūs / -ū (n.)	-es
Accusative Singular	-am	-um	-em / -∞ (n.)	-um / -ū (n.)	-em
Nominative Plural	-ae	-ī / -a (n.)	-ēs / -a (n.)	-ūs / -ua (n.)	-ēs
Accusative Plural	-ās	-ōs / -a (n.)	-ēs / -a (n.)	-ūs / -ua (n.)	-ēs

Source: Carl A.P.Ruck, "Intensive Latin", 1997. pp.33-37

Having observed the above table, we can obtain the following rules:
1) For all neuter nouns, the accusative case is identical with nominative case.
2) Except neuter nouns, all singular accusative case has -m as suffix.
3) Except neuter nouns, all Plural accusative case has -s as suffix.