Мой брат любит турник, а я чаще беру скакалку для разминки.

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Breakdown of Мой брат любит турник, а я чаще беру скакалку для разминки.

• мой: my
• любить: to love
• брат: the brother

Questions & Answers about Мой брат любит турник, а я чаще беру скакалку для разминки.

Why is it мой брат, not моего брата or some other form?

Because мой брат is the subject of the sentence, so it stays in the nominative case.

• мой = my in masculine nominative singular
• брат = brother in nominative singular

Russian changes word forms depending on their role in the sentence. Here, my brother is the one doing the action, so nominative is required.

Why does турник stay the same after любит? Shouldn’t the object change case?

It is in the object case: accusative. But for many inanimate masculine singular nouns, the accusative looks exactly like the nominative.

So:

• nominative: турник
• accusative: турник

That is why nothing changes in form.

Compare this with an animate masculine noun:

• Я вижу брата = I see my brother

Here брат becomes брата in the accusative because it is animate.

Why is it скакалку, not скакалка?

Because скакалку is the direct object of беру, so it is in the accusative case.

is a feminine noun ending in , and feminine nouns of this type usually change like this: