Language/Ukrainian/Grammar/Cases

In today's lesson, we will learn the purpose of Ukrainian cases and when to use them!

Cases are very important and not using them changes the meaning sometimes slightly:

• Я вчу українську - I learn Ukrainian
• Я вчу українською - I learn through Ukrainian (as in the lessons are in Ukrainian)

But sometimes it can make the meaning very different!

• Мама їсть курку. - Mom is eating the chicken.
• Маму їсть курка. - The chicken is eating mom.

Though I suppose, if you were saying the second one in a calm tone, they might cop on that your mother wasn't really being eaten by a chicken.

Here is the list of cases and there uses

• Nominative Case

• Genitive Case

• Dative Case*

• Accusative Case*

• Instrumental Case

• Locative Case

• Vocative Case

Source

https://forum.duolingo.com/comment/17637411/Overview-Of-Ukrainian-Grammar-UK-GRAMMAR-PORTAL