YOU SAID:

It always seems impossible until it's done

INTO JAPANESE

それが終わるまで、常に不可能に思える

BACK INTO ENGLISH

It always seems impossible until it's over.

INTO JAPANESE

それが終わるまで、いつも無理だと思われる。

BACK INTO ENGLISH

I don't think I can do it until it's over.

INTO JAPANESE

終わるまでは無理だと思う

BACK INTO ENGLISH

I don't think we can do this until we're done.

INTO JAPANESE

終わるまではできないと思う

BACK INTO ENGLISH

I don't think we can do this until we're done.