YOU SAID:

Why is it, not all the time but sometimes, that I cant get a good grade?

INTO JAPANESE

なんで、ないすべての時間は、良い成績を得ることができません。

BACK INTO ENGLISH

In what, well not all the time.

INTO JAPANESE

どのようなよくないすべての時間。

BACK INTO ENGLISH

What good all the time.

INTO JAPANESE

何が良いすべての時間。

BACK INTO ENGLISH

What is the best of all time.

INTO JAPANESE

すべての時間のベストは何です。

BACK INTO ENGLISH

What is the best of all time.