YOU SAID:

I really need to get a good grade for maths!

INTO JAPANESE

私は本当に数学のために良い成績をとる必要があります！

BACK INTO ENGLISH

I really need to get good grades for mathematics!

INTO JAPANESE

私は本当に数学の良い成績を取る必要があります！

BACK INTO ENGLISH

I really need to take good grades in mathematics!

INTO JAPANESE

私は本当に数学で良い成績を取る必要があります！

BACK INTO ENGLISH

I really need to take good grades in mathematics!