Compare each case across both numbers. The forms below are the noun's stored reference paradigm.
Singular and plural case forms for книга
Case
Singular
Plural
Nominative
книга
книги
Accusative
книгу
книги
Genitive
книги
книг
Dative
книге
книгам
Instrumental
книгойLong instrumental variant:книгоюAccepted in practice
книгами
Prepositional
книге
книгах
Form pattern
How the forms are built
The paradigm above is authoritative. These notes expose a transparent ending change only when the stored declension family supports one.
Genitive · Singularкниг- + -и → книги
Remove -а and add -и.
Show all case-build notes
Nominative · Singularкнига
This is the dictionary form used to identify the noun.Nominative · Pluralкниг- + -и → книги
Remove -а and add -и.Accusative · Singularкниг- + -у → книгу
Remove -а and add -у.Accusative · Pluralкниг- + -и → книги
Remove -а and add -и.Genitive · Singularкниг- + -и → книги
Remove -а and add -и.Genitive · Pluralкниг- + zero ending → книг
Remove -а; this form has a zero ending.Dative · Singularкниг- + -е → книге
Remove -а and add -е.Dative · Pluralкниг- + -ам → книгам
Remove -а and add -ам.Instrumental · Singularкниг- + -ой → книгой
Remove -а and add -ой.Instrumental · Pluralкниг- + -ами → книгами
Remove -а and add -ами.Prepositional · Singularкниг- + -е → книге
Remove -а and add -е.Prepositional · Pluralкниг- + -ах → книгах
Remove -а and add -ах.