YOU SAID:
I'm so bored I could sleep
INTO JAPANESE
私はとても退屈なので眠れなかった
BACK INTO ENGLISH
I was so bored that I couldn't sleep.
INTO JAPANESE
私はとても退屈だったので眠れなかった。
BACK INTO ENGLISH
I was so bored that I couldn't sleep.
That didn't even make that much sense in English.