YOU SAID:

I'm definitely not supposed to be doing school work right now...

INTO JAPANESE

私は間違いなく今学校の仕事をしているはずはありません.

BACK INTO ENGLISH

I definitely shouldn't be doing school work now.

INTO JAPANESE

私は間違いなく今学校の仕事をするべきではありません。

BACK INTO ENGLISH

I definitely shouldn't be doing school work now.