Learn Hardcore Ukrainian: Петро читає стару книгу.

Петро is the subject of the sentence. In Ukrainian, subjects appear in the nominative case, and since Петро is a proper noun, it remains unchanged in form when used as the subject.

How is the verb читає formed, and how does it agree with the subject?

The verb читає is the third-person singular present tense form of читати (“to read”). It agrees with the singular subject Петро, indicating that he is the one performing the action.

Why is the adjective стару used instead of стара to describe the noun?

In Ukrainian, adjectives must agree with the noun they modify in gender, number, and case. The noun книга (“book”) is feminine singular and appears as the direct object in the accusative case. Therefore, the adjective takes the accusative feminine singular form стару rather than the nominative form стара.

What case is the noun книгу in, and why is that case appropriate here?

The noun книгу is in the accusative case because it functions as the direct object of the verb читає. In Ukrainian, direct objects are marked by the accusative case, and feminine nouns of this type typically change their ending (from -а in the nominative to -у in the accusative).

Why does the sentence not include an article like “a” or “the” before стару книгу?

Ukrainian does not use articles. Instead of having separate words for definite or indefinite articles, Ukrainian relies on context and word endings to convey meanings that, in English, would be indicated by “a” or “the”.