Я випадково позичив не ту книжку.

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Breakdown of Я випадково позичив не ту книжку.

• книжка: the book
• випадково: accidentally
• позичити: to borrow

Questions & Answers about Я випадково позичив не ту книжку.

What does the sequence не ту mean here?

It’s the natural Ukrainian way to say the wrong (one). Literally it’s not that (feminine), but in context it means you selected the wrong item.

• Masculine: не той (wrong one, masc.)
• Feminine: не ту (wrong one, fem.)
• Neuter: не те
• Plural: не ті

Why is it ту, not та?

Because книжку is a direct object, so the demonstrative must be in the accusative case. Та is nominative feminine; ту is accusative feminine to match книжку (also accusative).

Why книжку and not книжка?

After a transitive verb, the direct object is in the accusative case. Feminine nouns ending in -а/-я typically change to -у/-ю in the accusative: книжка → книжку, газета → газету, історія → історію.

Does позичив mean “borrowed” or “lent”?