YOU SAID:

School is so useless and not helpful.

INTO JAPANESE

学校はとても役に立たず、役に立ちません。

BACK INTO ENGLISH

School is very useless and useless.

INTO JAPANESE

学校は非常に役に立たないと役に立たない。

BACK INTO ENGLISH

Schools are very useless and useless.

INTO JAPANESE

学校は非常に役に立たないし、役に立たない。

BACK INTO ENGLISH

Schools are very useless and useless.