In Japanese, the verb 返す (meaning "to to return (an object)", JLPT N4) conjugates in the Past Negative Casual form as 返さなかった (kaesanakatta). Verb group: Group 1.
Context Example
本を返さなかった。
Hon o kaesanakatta.
I did not return the book.
What is the Past Negative Casual conjugation of 返す (kaesu)?
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