YOU SAID:

i got such a bad grade

INTO JAPANESE

私はそのような悪い成績を得た

BACK INTO ENGLISH

I got such a bad grade.

INTO JAPANESE

私はとても悪い成績を取った。

BACK INTO ENGLISH

I had a very bad grade.

INTO JAPANESE

私は非常に悪い成績を持っていました。

BACK INTO ENGLISH

I had a very bad grade.