In Japanese, the verb 頑張る (meaning "to to do one's best / persist", JLPT N4) conjugates in the Past Negative Casual form as 頑張らなかった (ganbaranakatta). Verb group: Group 1.
Context Example
テストを頑張らなかった。
Tesuto o ganbaranakatta.
I did not do one's best on the test.
What is the Past Negative Casual conjugation of 頑張る (ganbaru)?
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