Handy tool for determining case.
When determine the case of the noun use both auxilary word and question:
<table class="MsoTableGrid" style="border-collapse: collapse; border: none; mso-border-alt: solid black .5pt; mso-yfti-tbllook: 1184; mso-table-lspace: 9.0pt; margin-left: 6.0pt; mso-table-rspace: 9.0pt; margin-right: 6.0pt; mso-table-anchor-vertical: page; mso-table-anchor-horizontal: page; mso-table-left: 108.45pt; mso-table-top: 189.25pt; mso-padding-alt: 0in 5.4pt 0in 5.4pt;" border="1" cellspacing="0" cellpadding="0" align="left"> <tbody> <tr> <td style="width: 2.05in; border: solid black 1.0pt; mso-border-alt: solid black .5pt; padding: 0in 5.4pt 0in 5.4pt;" valign="top" width="148">Case
</td> <td style="width: 2.05in; border: solid black 1.0pt; border-left: none; mso-border-left-alt: solid black .5pt; mso-border-alt: solid black .5pt; padding: 0in 5.4pt 0in 5.4pt;" valign="top" width="148">Auxilary word
</td> <td style="width: 2.05in; border: solid black 1.0pt; border-left: none; mso-border-left-alt: solid black .5pt; mso-border-alt: solid black .5pt; padding: 0in 5.4pt 0in 5.4pt;" valign="top" width="148">Question
</td> </tr> <tr> <td style="width: 2.05in; border: solid black 1.0pt; border-top: none; mso-border-top-alt: solid black .5pt; mso-border-alt: solid black .5pt; padding: 0in 5.4pt 0in 5.4pt;" valign="top" width="148">Nominative
</td> <td style="width: 2.05in; border-top: none; border-left: none; border-bottom: solid black 1.0pt; border-right: solid black 1.0pt; mso-border-top-alt: solid black .5pt; mso-border-left-alt: solid black .5pt; mso-border-alt: solid black .5pt; padding: 0in 5.4pt 0in 5.4pt;" valign="top" width="148">Это
</td> <td style="width: 2.05in; border-top: none; border-left: none; border-bottom: solid black 1.0pt; border-right: solid black 1.0pt; mso-border-top-alt: solid black .5pt; mso-border-left-alt: solid black .5pt; mso-border-alt: solid black .5pt; padding: 0in 5.4pt 0in 5.4pt;" valign="top" width="148">Кто? Что?
</td> </tr> <tr> <td style="width: 2.05in; border: solid black 1.0pt; border-top: none; mso-border-top-alt: solid black .5pt; mso-border-alt: solid black .5pt; padding: 0in 5.4pt 0in 5.4pt;" valign="top" width="148">Genitive
</td> <td style="width: 2.05in; border-top: none; border-left: none; border-bottom: solid black 1.0pt; border-right: solid black 1.0pt; mso-border-top-alt: solid black .5pt; mso-border-left-alt: solid black .5pt; mso-border-alt: solid black .5pt; padding: 0in 5.4pt 0in 5.4pt;" valign="top" width="148">Нет
</td> <td style="width: 2.05in; border-top: none; border-left: none; border-bottom: solid black 1.0pt; border-right: solid black 1.0pt; mso-border-top-alt: solid black .5pt; mso-border-left-alt: solid black .5pt; mso-border-alt: solid black .5pt; padding: 0in 5.4pt 0in 5.4pt;" valign="top" width="148">Кого? Чего?
</td> </tr> <tr> <td style="width: 2.05in; border: solid black 1.0pt; border-top: none; mso-border-top-alt: solid black .5pt; mso-border-alt: solid black .5pt; padding: 0in 5.4pt 0in 5.4pt;" valign="top" width="148">Dative
</td> <td style="width: 2.05in; border-top: none; border-left: none; border-bottom: solid black 1.0pt; border-right: solid black 1.0pt; mso-border-top-alt: solid black .5pt; mso-border-left-alt: solid black .5pt; mso-border-alt: solid black .5pt; padding: 0in 5.4pt 0in 5.4pt;" valign="top" width="148">Дать
</td> <td style="width: 2.05in; border-top: none; border-left: none; border-bottom: solid black 1.0pt; border-right: solid black 1.0pt; mso-border-top-alt: solid black .5pt; mso-border-left-alt: solid black .5pt; mso-border-alt: solid black .5pt; padding: 0in 5.4pt 0in 5.4pt;" valign="top" width="148">Кому? Чему?
</td> </tr> <tr> <td style="width: 2.05in; border: solid black 1.0pt; border-top: none; mso-border-top-alt: solid black .5pt; mso-border-alt: solid black .5pt; padding: 0in 5.4pt 0in 5.4pt;" valign="top" width="148">Accusative
</td> <td style="width: 2.05in; border-top: none; border-left: none; border-bottom: solid black 1.0pt; border-right: solid black 1.0pt; mso-border-top-alt: solid black .5pt; mso-border-left-alt: solid black .5pt; mso-border-alt: solid black .5pt; padding: 0in 5.4pt 0in 5.4pt;" valign="top" width="148">Вижу
</td> <td style="width: 2.05in; border-top: none; border-left: none; border-bottom: solid black 1.0pt; border-right: solid black 1.0pt; mso-border-top-alt: solid black .5pt; mso-border-left-alt: solid black .5pt; mso-border-alt: solid black .5pt; padding: 0in 5.4pt 0in 5.4pt;" valign="top" width="148">Кого? Что?
</td> </tr> <tr> <td style="width: 2.05in; border: solid black 1.0pt; border-top: none; mso-border-top-alt: solid black .5pt; mso-border-alt: solid black .5pt; padding: 0in 5.4pt 0in 5.4pt;" valign="top" width="148">Instrumental
</td> <td style="width: 2.05in; border-top: none; border-left: none; border-bottom: solid black 1.0pt; border-right: solid black 1.0pt; mso-border-top-alt: solid black .5pt; mso-border-left-alt: solid black .5pt; mso-border-alt: solid black .5pt; padding: 0in 5.4pt 0in 5.4pt;" valign="top" width="148">Горжусь
</td> <td style="width: 2.05in; border-top: none; border-left: none; border-bottom: solid black 1.0pt; border-right: solid black 1.0pt; mso-border-top-alt: solid black .5pt; mso-border-left-alt: solid black .5pt; mso-border-alt: solid black .5pt; padding: 0in 5.4pt 0in 5.4pt;" valign="top" width="148">Кем? Чем?
</td> </tr> <tr> <td style="width: 2.05in; border: solid black 1.0pt; border-top: none; mso-border-top-alt: solid black .5pt; mso-border-alt: solid black .5pt; padding: 0in 5.4pt 0in 5.4pt;" valign="top" width="148">Prepositional
</td> <td style="width: 2.05in; border-top: none; border-left: none; border-bottom: solid black 1.0pt; border-right: solid black 1.0pt; mso-border-top-alt: solid black .5pt; mso-border-left-alt: solid black .5pt; mso-border-alt: solid black .5pt; padding: 0in 5.4pt 0in 5.4pt;" valign="top" width="148">Думаю
</td> <td style="width: 2.05in; border-top: none; border-left: none; border-bottom: solid black 1.0pt; border-right: solid black 1.0pt; mso-border-top-alt: solid black .5pt; mso-border-left-alt: solid black .5pt; mso-border-alt: solid black .5pt; padding: 0in 5.4pt 0in 5.4pt;" valign="top" width="148">О ком? О чём?
</td> </tr> </tbody> </table><em> </em>
Do not confuse!
· Questions Где? Куда? Откуда? do not help you to figure out the case.
· Prepositions По and К point to Dative case.
· Prepositions В, На with questions Кого? Чего? (Genitive Case) are not used. These prepositions can be used with questions Кого? Что? (Accusative Case) or в Чём? в Ком? на Чём? на Ком? (Prepositional Case)
· If in doubt of belonging question Кого? to Genitive or Accusative Case, substitute the noun with the magic word Мама, and see the ending of the word: Мамы - Genitive; Маму - Accusative.
Join the group, Sonya, and get updates. I am going to continue posting. And thanks for your feedback.
Thank you,it´s very useful!