YOU SAID:
Jaehyun couldn't sleep very well last night, so that's why he didn't come to class.
INTO JAPANESE
昨夜はジェヒョンがあまりよく眠れなかったので、授業に来なかったのです。
BACK INTO ENGLISH
Jehyun didn't sleep very well last night, so he didn't come to class.
INTO JAPANESE
ジェヒョンは昨夜あまりよく眠れなかったので、授業に来なかった。
BACK INTO ENGLISH
Jae-hyun didn't sleep very well last night, so he didn't come to class.
INTO JAPANESE
ジェヒョンは昨夜あまりよく眠れなかったので、授業に来なかった。
BACK INTO ENGLISH
Jae-hyun didn't sleep very well last night, so he didn't come to class.
That didn't even make that much sense in English.
