YOU SAID:
お腹が痛いので、今日は休みます。
INTO JAPANESE
お腹が痛いので、今日は休みます。
BACK INTO ENGLISH
I have a stomach ache, so I will be absent today.
INTO JAPANESE
お腹が痛いので、今日は欠席します。
BACK INTO ENGLISH
I have a stomach ache, so I will be absent today.
You've done this before, haven't you.