Russian case inflections, cheatsheet

This is my personal cheatsheet for Russian case endings.


Nominative plural

General rules

Case Inflection
ends with -к/г/ч/ш/щ/х/ж → +и
ends with another consonant → +ы
neuter -о → change to -а
neuter -e → change to -я
ends with -ь/й/я → change to -и

Exceptions

Word Nominative plural
дочь → дочери
мать → матери
брат → братья
муж → мужья
сын → сыновья
друг → друзья
дерево → деревья
имя → имена
город → города
яблоко → яблоки
профессор → профессора
директор → директора

Accusative singular

General rules

Case Inflection
neuter → no change
masculine/feminine -а → change to -у
masculine/feminine -я → change to -ю
animate, ends with consonant → +а
animate, ends with -ь/й → change to -я

Exceptions

I don't know of any exceptions. There are nouns with a removable vowel e.g. ребёнок → ребёнка, but this vowel removal applies across all case endings and otherwise follows the case ending rules.


Accusative plural

General rules

Case Inflection
inanimate → same as nominative plural
animate → same as genitive plural

Exceptions

None that I know of.


Prepositional singular

General rules

Case Inflection
ends with consonant → +е
ends with -ий → change to -ии
ends with -й/а/о → change to -е
masculine -ь → change to -е
feminine -ь → change to -е
ends with -ие/ия → change to -ии
ends with other letter, then -е/я → change last letter to -е

Exceptions

Word Prepositional singular
лес → в лесу, but о лесе
сад → в саду, but о саде
Крым → в Крыму, but о Крыме
Клин → в Клину, but о Клине
мать → о матери
дочь → о дочери

Prepositional plural

General rules

These are the same as the dative plural endings, except that -м becomes -х.

Case Inflection
nom. plural ends -ы/а → change to -ах
nom. plural ends -г/к/х/ч/ш/щ/ц followed by -и/я → change -и/я to -ах
nom. plural ends -и/я → change to -ях

Exceptions

None that I know of.


Genitive singular

General rules

Case Inflection
masculine, ends in consonant → +а
neuter -о → change to -а
masculine, ends in -ь/й → change to -я
neuter -е → change to -я
neuter -мя → change to -ени
feminine -а → change to -ы
feminine -я/ь → change to -и
feminine -ка/га/ха/жа/ча/ша/ща → change -а to -и

Exceptions

Word Genitive singular
дочь → дочери
мать → матери

Genitive plural

General rules

Case Inflection
-ь → сhange to -ей
-ж/ч/ш/щ → +ей
masculine, ends in -ц unstressed → +ев
masculine, ends in consonant → +ов
feminine/neuter, consonant group (not -тв/гр/рт) followed by -а/о → insert -о- or -е- in consonant group, drop -а/о
feminine/neuter, -а/о → drop -а/о
-ия/ие → -ий
nom. plural ends -ья unstressed → change to -ьев
nom. plural ends -ья stressed → change to -ей
-й → -ев
-жка/чка/шка/цка/ька → change to -жек/чек/шек/чек/ек
ends in consonant followed by -ка → change to -ок
-йка → -ек
ends in consonant followed by -ня → change to -ен
ends in consonant followed by -я → change to -ь
-анин/янин → change to -ан/ян

Exceptions


Dative singular

General rules

Case Inflection
masculine, ends in consonant → +у
masculine, ends in -ь/й → change to -ю
neuter, ends in -о → change to -у
neuter, ends in -е → change to -ю
masculine/feminine, ends in -а/я → same as prepositional singular

Exceptions

No exceptions that I know of, except for the vowel-dropping nouns.


Dative plural

General rules

Case Inflection
nom. plural ends -ы/а → change to -ам
nom. plural ends -г/к/х/ч/ш/щ/ц followed by -и/я → change -и/я to -ам
nom. plural ends -и/я → change to -ям

Exceptions

No exceptions that I know of, except for the vowel-dropping nouns.


Instrumental singular

General rules

Case Inflection
masculine, ends in stressed -ж/ч/ш/щ/ц → +ем
masculine, ends in consonant → +ом
neuter -о → change to -ом
masculine -ь/й → change to -ем/ём based on stress
neuter -е/ё → +м
masc/fem, ends in stressed -ж/ч/ш/щ/ц → +ей
masc/fem, ends in consonant → +ой
-я → change to -ей/ёй based on stress
feminine -ь → +ю

Exceptions

Word Instrumental singular
дочь → дочерью
мать → матерью

Instrumental plural

General rules

Case Inflection
nom. plural ends -ы/а → change to -ами
nom. plural ends -г/к/х/ч/ж/ш/щ/ц followed by -и/я → change to -ами
nom. plural ends -и/я → change to -ями

Exceptions

Word Instrumental plural
дети → детьми
дочери → дочерьми
лошади → лошадьми
люди → людьми

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