Я купую вишні, хоча сливи дуже стиглі.

I am buying sour cherries although the plums are very ripe.

Breakdown of Я купую вишні, хоча сливи дуже стиглі.

• я: I
• дуже: very
• купувати: to buy
• хоча: although

Questions & Answers about Я купую вишні, хоча сливи дуже стиглі.

Why is вишні used here? What case is it?

Вишні is the accusative plural of вишня.

It is the direct object of купую:
Я купую вишні = I am buying cherries.

A useful point: for many inanimate plural nouns in Ukrainian, the accusative plural looks the same as the nominative plural. So:

• nominative plural: вишні
• accusative plural: вишні

That is why the form does not visibly change here.

Why is сливи also in the plural, and what case is it?

Сливи is nominative plural because it is the subject of the second clause:

сливи дуже стиглі = the plums are very ripe

So the sentence has two parts:

• Я купую вишні — I am buying cherries
• хоча сливи дуже стиглі — although the plums are very ripe

Here, сливи is not an object; it is the thing being described.

Why is there no word for are in сливи дуже стиглі?