YOU SAID:

I should be studying right now, however I'm being useless

INTO JAPANESE

今は勉強するべきなのに、役に立たない

BACK INTO ENGLISH

I should be studying now, but it's no use.

INTO JAPANESE

今は勉強するべきなのに、無駄だ。

BACK INTO ENGLISH

I should be studying now, but it's no use.