YOU SAID:

Oh no I was not supposed to be here now

INTO JAPANESE

ああ、私は今ここにいるはずがなかった

BACK INTO ENGLISH

Oh, I couldn't have been here now

INTO JAPANESE

ああ、今ここにいられなかった

BACK INTO ENGLISH

Oh, I could n’t be here right now

INTO JAPANESE

ああ、私は今ここにいられなかった

BACK INTO ENGLISH

Oh, I couldn't be here now

INTO JAPANESE

ああ、私は今ここにいられなかった

BACK INTO ENGLISH

Oh, I couldn't be here now