Case endings

Question 1

парень - instrumental

singular, masculine, soft, fleeting vowel

Answer 1

парнем

add -ем

Question 2

башня - instrumental

singular, feminine, soft

Answer 2

башней

replace -я with -ей

Question 3

аналист - instrumental

singular, masculine, hard

Answer 3

аналистом

add -ом

Question 4

девушка - instrumental

singular, feminine, hard

Answer 4

девушкой

replace -a with -ой

Question 5

ночь - instrumental

singular, feminine, soft sign

Answer 5

ночью

add -ю

Question 6

молоко - instrumental

singular, neuter

Answer 6

молоком

no matter if it ends in -e or -o, add -м

Question 7

друзья - instrumental

plural, soft

Answer 7

друзьями

use nominative plural stem to form instrumental plural, replace -я with -ями

Question 8

имена - instrumental

plural, hard

Answer 8

именами

use nominative plural stem to form instrumental plural, replace -а with -ами

Question 9

продавщи́ца - instrumental

singular, feminine, hissing consonant, ending unstressed

Answer 9

продавщи́цей

Since ending is unstressed, we replace -а with -е. Because it is feminine, we add -й

Question 10

плове́ц - instrumental

singular, masculine, hissing consonant, ending stressed, fleeting vowel

Answer 10

пловцо́м

Since ending is stressed, we add -o. Because it is masculine, we add -м.

Question 11

све́точ - instrumental

singular, masculine, hissing consonant, ending unstressed

Answer 11

све́точем

Since ending is unstressed, we add -e. Because it is masculine, we add -M.

Question 12

Instrumental case hissing consonant endings

Answer 12

Masculine stressed ending: -ом
Feminine stressed ending: - ой
Masculine unstressed ending: -ем
Feminine unstressed ending: -ей

Nouns ending with soft sign have the usual -ю

All plurals end in -ами

Question 13

Instrumental case endings (excl. hissing consonants)

Answer 13

masculine, singular, hard: -ом
masculine, singular, soft: -ем
feminine, singular, hard: -ой
feminine, singular, soft: -ей
feminine, singular, soft sign: -ью
neuter, singular, both: -м
plural hard: -ами
plural soft: -ями
use nominative plural stem to make instrumental plural.

Question 14

дом - accusative

masculine, singular, hard or soft, inanimate

Answer 14

дом

masculine inanimates do not change in accusative case

Question 15

Слон - accusative

masculine, singular, hard, animate

Answer 15

слона

add -a

Question 16

Парень - accusative

masculine, singular, soft, animate, fleeting vowel

Answer 16

парня

add -я

Question 17

Мама - accusative

feminine, singular, hard

Answer 17

маму

replace -a with -y

Question 18

Семья - accusative

feminine, singular, soft

Answer 18

семью

replace -я with -ю

Question 19

дверь - accusative

feminine, singular, soft sign

Answer 19

дверь

feminine soft signs do not change in accusative case

Question 20

молоко - accusative

singular, neuter, hard

Answer 20

молоко

neuter nouns do not change in the accusative case

Question 21

accusative case endings

Answer 21

masc, singular, inanimate, both: no change
masc, singular, animate, hard: -a
masc, singular, animate, soft: -я
fem, singular, hard: -y
fem, singular, soft: -ю
neuter, singular, both: no change

Question 22

Детройт - prepositional

masculine, singular, hard

Answer 22

Детройте

add -e

Question 23

словарь - prepositional

masculine, singular, soft sign

Answer 23

словаре

add -e

Question 24

санаторий - prepositional

masculine, singular, -й

Answer 24

санатории

add -и

Question 25

Америка - prepositional

feminine, singular, hard

Answer 25

Америке

replace -a with -e

Question 26

Семья - prepositional

feminine, singular, soft

Answer 26

семье

replace -я with -e

Question 27

Тверь - prepositional

feminine, singular, soft sign

Answer 27

Твери

replace soft sign with -и

Question 28

prepositional case endings

Answer 28

masc, singular, hard, soft, and soft sign: -e
masc, singular, й: -и
fem, singular, hard and soft: -e
fem, singular, soft sign: -и
neuter, singular, hard: -e
neuter, singular, -e: no change
neuter, singular, soft: -и

Question 29

окно - prepositional

neuter, singular, hard

Answer 29

окне

replace -o with -e

Question 30

Море - prepositional

neuter, singular, -e

Answer 30

Море

no change

Question 31

Общежитие - prepositional

neuter, singular, soft

Answer 31

общежитии

replace -e with -и

Question 32

друг - dative

masc, singular, hard

Answer 32

другу

add -y

Question 33

парень - dative

masc, singular, soft, fleeting vowel

Answer 33

парню

add -ю

Question 34

подруга - dative

fem, singular, -a

Answer 34

подруге

replace -a with -e

Question 35

возня - dative

fem, singular, -я

Answer 35

возне

replace -я with -e

Question 36

мышь - dative

fem, singular, soft sign

Answer 36

мыши

replace soft sign with -и

Question 37

Россия - dative

fem, singular, -ия

Answer 37

России

replace -ия wth -ии

Question 38

пиво - dative

neuter, singular, hard

Answer 38

пиву

replace -o with -y

Question 39

море - dative

neuter. singular, soft

Answer 39

морю

replace -e with -ю

Question 40

дом - dative

plural

Answer 40

домам

use nominative plural stem + -ам; similar to instrumental case

Question 41

друг - dative

plural

Answer 41

друзьям

use nominative plural stem + -ям; similar to instrumental case

Question 42

dative case endings

Answer 42

masc, singular, consonant: -y
masc, singular, -й or -ь: -ю
fem, singular, -a or -я: -e
fem, singular, -ь: -и
fem, singular, -ия: -ии
neuter, singular, -o: -y
neuter, singular, -e: -ю
plural: -ам or -ям