Первый лег уже начался.

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Breakdown of Первый лег уже начался.

• первый: first
• начаться: to start
• лег: the leg (in darts)

Questions & Answers about Первый лег уже начался.

What does лег mean here? Is it the same as лёг from лечь?

No. Here лег is a noun, a borrowing from English leg, used in sports and games for a leg, round, or one part of a multi-part match.

It is not the verb лёг meaning lay down or went to bed.

This can be confusing because Russian often writes ё as е in ordinary text. So лёг may appear as лег in some contexts. But in this sentence, первый лег clearly works as a noun phrase: the first leg.

Why is it первый and not первая or первое?

Because лег is a masculine singular noun, and первый has to agree with it.

So:

• первый = masculine singular
• первая = feminine singular
• первое = neuter singular

Since the noun is лег, the correct form is первый лег.

What case is первый лег in?

It is in the nominative case because it is the subject of the sentence — the thing that has started.

So the structure is basically:

• первый лег = the first leg
• уже начался = has already started / already started

Why is the verb , not ?