YOU SAID:
i cannot explain how sleepy i am right now
INTO JAPANESE
私は今どれだけ眠いのか説明できません
BACK INTO ENGLISH
I can't explain how sleepy I am now
INTO JAPANESE
私は今どれほど眠いのか説明できません
BACK INTO ENGLISH
I can't explain how sleepy I am now
That didn't even make that much sense in English.