YOU SAID:

I won't be done until my head falls off.

INTO JAPANESE

頭が落ちるまでは終わらない。

BACK INTO ENGLISH

It won't be over until my head falls.

INTO JAPANESE

頭が落ちるまで終わらない

BACK INTO ENGLISH

I'm not finished until my head falls.

INTO JAPANESE

頭が落ちるまで終わらない

BACK INTO ENGLISH

I'm not finished until my head falls.