YOU SAID:

If she weren't my daughter, perhaps I'd be dating her

INTO JAPANESE

彼女は私の娘ではなかった場合は、おそらく私は彼女をデートしているはずです

BACK INTO ENGLISH

If she was not my daughter, perhaps I should have been dating her

INTO JAPANESE

彼女は私の娘ではなかった場合は、おそらく私は彼女とデートされている必要があります

BACK INTO ENGLISH

If she was not my daughter, perhaps I should have been a date with girlfriend

INTO JAPANESE

彼女は私の娘ではなかった場合は、おそらく私はガールフレンドとデートされている必要があります

BACK INTO ENGLISH

If she was not my daughter, perhaps I should have been girlfriend and dating

INTO JAPANESE

彼女は私の娘ではなかった場合は、おそらく私はガールフレンドとデートしている必要があります

BACK INTO ENGLISH

If she was not my daughter, perhaps I should have been girlfriend and dating