YOU SAID:

have you ever done this in school because you where bored

INTO JAPANESE

退屈だから学校でこれをやったことがありますか

BACK INTO ENGLISH

Have you ever done this at school because you were bored

INTO JAPANESE

退屈で学校でこんなことをしたことがありますか

BACK INTO ENGLISH

Have you ever done this at school because you were bored?

INTO JAPANESE

退屈だったので、学校でこれをしたことがありますか?

BACK INTO ENGLISH

Have you ever done this at school because you were bored?