YOU SAID:

i cant go to school today because im very tired

INTO JAPANESE

私はとても疲れたので今日学校に行くことができません

BACK INTO ENGLISH

I am so tired that I cannot go to school today

INTO JAPANESE

今日は学校に行けないほど疲れている

BACK INTO ENGLISH

I'm so tired that I can't go to school today

INTO JAPANESE

今日は学校に行けないほど疲れた

BACK INTO ENGLISH

I'm so tired that I can't go to school today