How to form the accusative singular of nouns

Nom sg Acc sg
1st declension Masc (cons) *
-ий
Neut same as nominative
-ие
2nd decl Fem
Masc
-ия +ию
3rd decl Fem same as nominative

* For masculine nouns the accusative singular sometimes copies the nominative and sometimes copies the genitive. If the noun is inanimate, then the accusative singular copies the nominative singular. If the noun is animate (people, animals), the accusative singular copies the genitive singular. Thus the accusative singular of журнал “magazine” is журнал, whereas the accusative singular of студент “male college student” is студента.