YOU SAID:
I am so tired I can't see straight
INTO JAPANESE
私はとても疲れているので、まっすぐ見ることができない
BACK INTO ENGLISH
I'm so tired that I can't see straight
INTO JAPANESE
私はとても疲れているので、まっすぐ見ることができない
BACK INTO ENGLISH
I'm so tired that I can't see straight
That didn't even make that much sense in English.