YOU SAID:

do not go to class today or tomorrow

INTO JAPANESE

今日か明日のクラスには行けない

BACK INTO ENGLISH

I can not go to the class today or tomorrow

INTO JAPANESE

今日、明日はクラスに行くことができない

BACK INTO ENGLISH

Today, tomorrow I can not go to class

INTO JAPANESE

今日、明日はクラスに行くことができません

BACK INTO ENGLISH

Today, tomorrow I can not go to class